Dissertations / Theses on the topic 'Root canal filling materials. eng'
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Sant'Anna, Junior Arnaldo. "Avaliação do preenchimento de canais laterais simulados proporcionais pela guta-percha e Resilon empregando diferentes técnicas de obturação /." Araraquara : [s.n.], 2011. http://hdl.handle.net/11449/104181.
Full textBanca: Milton Carlos Kuga
Banca: Fábio Luiz Camargo Villela Berbet
Banca: Celso Luiz Caldeira
Banca: Ivaldo Gomes de Moraes
Resumo: O objetivo deste estudo foi avaliar a capacidade de preenchimento de canais laterais simulados pela guta-percha e Resilon, empregando diferentes técnicas termoplastificadoras de obturação: Condensação Vertical Aquecida (CVA), Compactação Termomecânica (CT) e Sistema Obtura II (SO). Foram utilizados 135 dentes humanos unirradiculados extraídos. Após preparo biomecânico, foram confeccionados seis canais laterais simulados em suas raízes, de acordo com a técnica proposta por Venturi et al. (2005). O diâmetro desses canais foi correspondente aos instrumentos # 08 e 10, sendo estabelecidos a 2, 5 e 8 mm do comprimento de trabalho (CT). Os espécimes foram divididos em 9 grupos (n=15), sendo: Grupo I (CVA + guta-percha Dentsply), Grupo II (CVA + Resilon), Grupo III (CVA + guta-percha Odous), Grupo IV (CT + guta-percha Dentsply), Grupo V (CT + Resilon), Grupo VI (CT + guta-percha Odous), Grupo VII (SO + guta-percha Obtura Flow 150), Grupo VIII (SO + Resilon) e Grupo IX (SO + guta-percha Odous Flow). Após a realização das obturações, os espécimes foram analisados pelos métodos radiográfico e diafanização, em função do percentual de preenchimento nos canais laterais, nos três terços. Os resultados foram submetidos ao teste de Kruskal-Wallis, com 5% de nível de significância, de acordo com avaliações específicas intra-grupos: CVA (Grupos I, II e III), CTH (Grupos IV, V e VI), SO (Grupos VII, VIII e IX) e Resilon (Grupos II, V e VIII). As avaliações CVA e CTH mostraram que o Resilon apresentou maior capacidade de preenchimento nas duas análises, em relação aos demais materiais, nos terços apical e médio (p<0,05). Quanto à avaliação SO, todos os materiais apresentaram boa capacidade de preenchimento dos canais laterais em todos os terços, com exceção do terço cervical onde o Resilon foi... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The aim of this study was to evaluate the ability of gutta-percha and Resilon to fill simulated canals using different thermoplastic obturation techniques: Warm Vertical Compaction (CVA), Thermomechanical Compaction (CTE) and Obtura II System (SO). It was used 135 extracted human teeth uniradicular. After biomechanical preparation, six simulated lateral canals were prepared in the roots, according to the technique proposed by Venturi et al. (2005). The diameter of these canals was equivalent to # 08 and 10 instruments and are set at 2, 5 and 8 mm to working length (WL). The specimens were divided into nine groups (n=15), as follow: Group I (CVA + gutta-percha Denstply), Group II (CVA + Resilon), Group III (CVA + gutta-percha Odous), Group IV (CTE + gutta-percha Dentsply), Group V (CTE + Resilon), Group VI (CTE + gutta-percha Odous), Group VII (SO + gutta-percha Obtura Flow 150), Group VIII (SO + Resilon) and Group IX (SO + gutta-percha Odous Flow). After the obturation, the samples were analyzed by radiographic and clearing methods, according to percentage of filling the lateral canals, in the three thirds. The result were submitted to the Kruskal-Wallis test at 5% significance level, according to specific intra-group evaluations: CVA (Groups I, II and III), CTH (Groups IV, V and VI), SO (Groups VII, VIII and IX) and Resilon (Groups II, V and VIII). CVA and CTH assessments showed that the Resilon has great ability to fill lateral canals in the two tests, compared to the other materials, in the apical and middle thirds (p < 0.05). As for SO evaluation, all materials showed good filling capacity of the lateral canals in all thirds, except in the cervical third where Resilon was better by radiographic analysis (extension and area) and in the cervical and middle thirds for clearing analysis (extension)... (Complete abstract click electronic access below)
Doutor
Souza, Erick Miranda. "Avaliação da qualidade da obturação de canais radiculares e da confiabilidade do modelo de penetração de glicose /." Araraquara : [s.n.], 2008. http://hdl.handle.net/11449/101641.
Full textBanca: Márcia Carneiro Valera
Banca: Ivaldo Gomes de Moraes
Banca: Renato de Toledo Leonardo
Banca: Mário Tanomaru Filho
Resumo: Diferentes técnicas de compactação da guta-percha (GP) e cimentos oburadores podem alterar a qualidade final da obturação do canal radicular. Recentemente foi introduzido um novo modelo de análise da qualidade de obturações endodônticas baseado na mensuração da concentração da glicose que passa pela falha na obturação. Este trabalho é composto por três capítulos cujos objetivos foram: a) determinar os efeitos de variações na técnica de condensação lateral (LC) e da área do canal na qualidade da obturação; b) verificar se diferentes materiais obturadores alteram a concentração do traçador utilizado no modelo de penetração de glicose, e; c) determinar se são similares os resultados de infiltração dos mesmos espécimes avaliados pelos modelos de penetração de glicose e transporte de fluidos. No primeiro estudo sessenta caninos humanos foram instrumentados e divididos em três grupos obturados por diferentes técnicas de LC e cimento AH Plus. Uma nova técnica usando uma seqüencia de espaçadores antes da colocação de um cone acessório foi comparada com duas técnicas comumente utilizadas. As raízes obturadas foram seccionadas nos níveis 3 mm e 6 mm a partir do ápice e as secções fotografadas. Usando um software de análise de imagens, as áreas do canal e de GP em cada nível foram mensuradas e a porcentagem de área obturada por guta-percha (PGP) foi calculada. Análise múltipla de variância foi utilizada para verificar as variáveis influenciando a PGP. Teste de regressão linear foi utilizado para verificar a influência da área do canal na PGP em cada nível de secção. Em ambas as secções o canal mais largo foi 2-3 vezes maior que o menos largo. Quanto maior a área do canal, menor a PGP nos níveis 6 mm (r2=0,154, P=0,02) e 3 mm (r2=0,119, P=0,007). A PGP no nível 3 mm foi menor que a 6 mm (P=0.003). A nova técnica atingiu maior PGP que as demais em ambos os níveis (P<0.05).
Abstract: Different gutta-percha (GP) compaction techniques and root canal sealers may affect the final quality of the root canal filling. Recently, it was discussed a new method for evaluation of the quality of root fillings based on measuring the concentration of the glucose that penetrates through voids in the obturation. This work is divided in 3 chapters aiming to: a) determine the effects of different techniques and canal area on the quality of laterally compacted root fillings; b) verify whether different filling materials react with the tracer used in the glucose penetration model, and; c) determine whether leakage results of the same specimens measured by the glucose penetration and fluid transport are comparable. In the first study sixty extracted canines were instrumented to the same size and equally divided in three groups filled with laterally compacted GP cones and AH Plus sealer using different techniques. A new technique with use of a sequence of spreaders prior to the accessory cone placement was compared to two commonly used techniques. The filled roots were horizontally sectioned at 3 mm and 6 mm from the apex and micro-photographs of the cross-sections were taken. Using an image-analysis software, the canal and GP areas at each level were measured. The percentage of gutta-percha filled canal area (PGP) was calculated. A Multivariate analysis was used to account for the variables influencing the PGP. Linear regression test was used to verify the influence of canal area on PGP. At each level the largest canal was 2-3 times larger than the smallest. The larger the canal area, the lower the PGP at 6 mm level (r2= 0.154, P=0.02) and at 3 mm level (r2=0.119, P=0.007). The PGP at 3 mm was lower than at 6 mm (P=0.003). The new technique achieved higher PGP than other techniques (P=0.00002).
Doutor
Guinesi, Adriana Simionatto. "Avaliação de solubilidade e desintegração, alteração dimensional e resistência à compressão de cimentos endodônticos /." Araraquara : [s.n.], 2008. http://hdl.handle.net/11449/90413.
Full textAbstract: Considering all the steps of the endodontic therapy, their success depend on the root canals sealing when the professional uses an endodontic sealer that gathers physical, chemical and biological properties. The aim of this study was to evaluate the endodontic sealers: Acroseal, AH Plus, Epiphany and a castor-oil based experimental sealer (Polifil) concerning the properties of solubility and disintegration, dimensional change and compressive strength. All of these tests were supposed to follow the ISO Specification 6876-2, 2001 and ISO Specification 9917-1, 2003. To perform the solubility and disintegration tests teflon rings (4 mm thickness, 12 mm of internal diameter, and 2 mm height) filled with the endodôntico sealers were used, containing perforations that allow a nylon wire passing through it, in order to get the specimens raised up. They were storaged in the oven under 37º C up to the setting time. The specimens were hydrated and dehydrated to be weighted for 24h, 48h, 72h, 7, 14, 30, 60 and 90 days. The solubility of the endodontic sealers was identified as a percentage obtained through the difference between the last measure of weight and the initial one. The disintegration were visually identified by observating the residues and the water's whirlwind. Teflon moulds (12 mm thickness and 6mm diameter) were used in dimensional change and compressive strength tests. They were filled with the endodontic sealers and storaged in the oven under 37º C up to the setting time. Afterwards, the moulds were removed and then, for the dimensional change test, they were measured under the longitudinal position with digital pachymeter for 24h, 48h, 72h, 7, 14, 30, 60 and 90 days. The dimensional change was identified as a percentage of the volumetrical change gotten in each time, compared with the first specimen.
Orientador: Idomeo Bonetti Filho
Coorientador: Luís Geraldo Vaz
Banca: Yara Teresinha Corrêa Silva Souza
Banca: Roberto Miranda Esberard
Mestre
Bier, Carlos Alexandre Souza. "Avaliação do pH, da liberação de íons cálcio e da adesividade de cimentos endodônticos contendo hidróxido de cálcio ou à base de MTA /." Araraquara : [s.n.], 2009. http://hdl.handle.net/11449/104185.
Full textBanca: Luis Geraldo Vaz
Banca: Idomeo Bonetti Filho
Banca: Marco Antônio Hungaro Duarte
Banca: Marcus Vinicius Reis Só
Resumo: O objetivo desse estudo foi a avaliação da liberação de íons cálcio, do pH e da adesividade de alguns cimentos utilizados em Endodontia: Sealapex (G1), Sealer 26 (G2), Acroseal (G3), Epiphany (G4), MTA Branco (G5), Endo CPM Sealer (G6). Após a espatulação, os materiais foram inseridos em tubos de polietileno medindo 1,5 mm de diâmetro interno e 1 cm de comprimento com ambas extremidades abertas e imersos em frascos de vidro contendo 10 mL de água ultra pura. Nos períodos de 2, 6, 12, 24 e 48 horas, 7, 14 e 28 dias foram realizadas as análises, sendo o tubo contendo o cimento transferidos para novo frasco a cada período. O pH e a liberação de íons cálcio foram avaliados, respectivamente por meio de pH metro e espectrofotometria de absorção atômica. Para a avaliação da adesividade dos cimentos endodônticos às paredes dentinárias, os canais radiculares de 28 dentes humanos uniradiculados foram dilatados com brocas de Gates Glidden número 1, 2 e 3 e brocas largo número 1, 3 e 5. As raízes foram cortadas em máquina de corte para confecção de discos de 2 mm de espessura. Durante o preparo e depois da secção os espécimes foram irrigados com solução de hipoclorito de sódio a 2,5% e com EDTA a 17 % para a remoção da smear layer. Após a divisão aleatória nos grupos experimentais, os espécimes foram secos e preenchidos com os cimentos endodônticos, sendo mantidos em estufa a 37oC e 95% de umidade relativa do ar por 48 hs. Em seguida, cada conjunto dentina/cimento endodôntico foi submetido ao teste push-out em uma máquina de ensaio mecânico e a tensão necessária para a remoção do cimento medida em Mega Pascal (MPa). Após a coleta dos dados estes foram submetidos à análise estatística de Análise Variância e teste Tukey, com nível de 5% de significância. Os maiores valores de pH foram obtidos pelos G6, seguido por G2 e G5 após 2 horas (P<0,05)... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The aim of this study was to evaluate in vitro the pH, calcium ion release and adhesiveness provide by 6 endodontic filling materials: Sealapex (G1), Sealer 26 (G2), Acroseal (G3), Epiphany (G4), White MTA (G5), Endo CPM Sealer (G6). After manipulation, the sealers (n=10) were placed in tubes with 10 mm-long and 1.5 mm in diameter and immediately immersed in a glass flask containing 10 ml of ultra pure water, which was hermetically sealed and stored at 37°C. At 2, 6, 12, 24 and 48 hr, and at 7, 14 and 28 days after mixing the tubes were moved to new flask with fresh solution and the water in which they were immersed was analyzed for pH with a pH meter and for released calcium by atomic absorption spectrophotometry. To evaluate the adhesiveness of the sealers to the root canal wall, 28 teeth were enlarged to size 5 Largo drill and cut in a cutting machine to create 2 mm thickness slices. During all this procedure the root canal was irrigated with sodium hypochlorite 2.5% and with EDTA 17% to remove the smear layer. The slices were randomly allocated to one of the groups, dried and filled with the sealers and kept in a controlled environment (37oC and 95% humidity) to allow the setting of the sealers. After that, the slice root/endodontic sealer was submitted to push out test in a mechanical testing machine and the results were expressed in Mega Pascal (MPa). The results obtained at each time were statistically evaluated. After 2 hours the uppermost pH was found in the G6, followed by G2 and G5 (P<0,05). From 6 h till 24 h the highest value were observed in groups G5, G6 and G2. After 48 hours, the pH of groups G5 and G6 were stood out. Finally from the 7th to 28th days of evaluation G2, G5 and G6 presented the utmost pH. With regards to calcium ions release in beginning periods the G6 was statistical significantly from the other groups until the 7th day (P<0.05)... (Complete abstract click electronic access below)
Doutor
Lima, Regina Karla de Pontes. "Sistema adesivo na obturação de canais radiculares : biocompatibilidade e infiltração coronária (reparação apical e periapical em dentes de cães) /." Araraquara: [s.n.], 2006. http://hdl.handle.net/11449/90393.
Full textBanca: Lea Assed Bezerra da Silva
Banca: Antonio Carlos Bombarda
Resumo: O objetivo deste estudo foi o de avaliar, in vivo, a biocompatibilidade e a influência da infiltração, no sentido coroa/ápice, na reparação dos tecidos apicais e periapicais pós-tratamento endodôntico, utilizando dois diferentes materiais obturadores: o cimento Sealapex e um sistema resinoso de obturação de canal radicular denominado de sistema Epiphany/Resilon. Os resultados mostraram que o sistema Epiphany/Resilon apresentou resposta tecidual apical e periapical melhor que o cimento Sealapex, independente da presença ou não de restauração coronária, em todos os aspectos estudados. O sistema Epiphany/Resilon com restauração coronária apresentou melhores resultados que o mesmo sistema sem restauração coronária. O cimento Sealapex sofreu influência da infiltração coronária, apresentando, em todas as variáveis estudadas, os piores resultados, quando exposto ao meio bucal.
Abstract: The objective of this study was to evaluate, in vivo, the biocompatibility and the leakage influence, in the crown-apex direction, in the endodontic post-treatment repairing of apical and periapical tissues, using two different filling materials: Sealapex sealer and a resinous cement of root canal filling - Epiphany/Resilon. The results showed that Epiphany/Resilon system presented apical and periapical tissue response better than Sealapex independent of presence or no of the coronary restoration, in all studied aspects. Epiphany/Resilon system, with coronary restoration presented better results than of the same system without coronary restoration. Sealapex was influenced by the coronary exposition to oral environment, presenting the worst results in all studied variables.
Mestre
Silva, Paulo Tadeu da. "Avaliação da citotoxicidade de cimentos endodônticos em relação aos reativos intermediários do oxigênio e nitrogênio em culturas de macrófagos peritoneais de camundongos /." Araraquara : [s.n.], 2004. http://hdl.handle.net/11449/101640.
Full textBanca: Celso Kenji Nishiyama
Banca: Abílio Albuquerque Maranhão de Moura
Banca: Iracilda Zeppone Carlos
Banca: Idomeo Bonetti Filho
Resumo: Analisou-se a citotoxicidade dos seguintes cimentos: Endofill, Sealapex e Polifil, quanto à liberação de óxido nítrico (NO) e peróxido de hidrogênio (H2O2) em culturas de macrófagos peritoneais de camundongos e também utilizamos um método de análise colorimétrica usando M.T.T. Concluiu-se que as considerações presentes após os resultados, discussão e constatação os cimentos que apresentaram o menor nível de citotoxicidade foi o Endofill, seguido da equivalência de liberação de Polifil e Sealapex, embora todos foram menos citotóxicos que o Grupo Controle Zimosan-A para H2O2 e o LPS para o NO.
Abstract: It was analyzed the citotoxicity of the following cements Endofill, Sealapex, and Poliol regarding the nitric oxide (NO) release and the hydrogen peroxide (H2O2) in the peritoneais macrophages medium of mice in different concentrations and we have also analyzed a colorimetric method using the M.T.T. It was concluded from the considerations which were present in the results, discussion, and verification that the cement which presented the lowest citotoxicity level was the Sealapex followed by the Polifil and the Endofill, although all of them were less citotoxic than the Zimosan-A control group for H2O2 and the LPS for the NO.
Doutor
Silva, Paulo Tadeu da. "Avaliação da citotoxicidade de cimentos endodônticos quanto a liberação de peróxido de hidrogênio e óxido nítrico em culturas de macrófagos peritoneais de camundongos /." Araraquara : [s.n.], 2002. http://hdl.handle.net/11449/90420.
Full textBanca: Renato de Toledo Leonardo
Banca: Celso Kenji Nishiyama
Resumo: Avaliou-se a citotoxicidade dos cimentos Topseal, EndoRez, Tubli-Seal e Kerr Pulp Canal Sealer E.W.T. quanto a liberação de derivados do oxigênio no contato cimento/cultura de macrófagos peritoneais de camundongos. Respectivamente os cimentos que mais liberaram H2O2 na concentração de 9 mg/ml foi o Topseal > Zimosan > EndoRez > Tubli-Seal = Kerr Pulp E.W.T. e na concentração de 18 mg/ml foi o Topseal > Zimosan = EndoRez > Tubli-Seal > Kerr Pulp E.W.T. Os que mais liberaram NO na concentração de 9 mg/ml foi o LPS > Topseal > Kerr Pulp E.W.T. > Tubli-Seal = EndoRez e na concentração de 18 mg/ml foi o LPS > Topseal = Kerr Pulp E.W.T. > Tubli-Seal > EndoRez.
Abstract: It was evaluated the citotoxicity of the sealers Topseal, EndoRez, Tubli-Seal and Kerr Pulp Canal Sealer after exposure to rat peritoneal macrophage culture, due to oxigen derivate liberation. Respectively, the sealer that, liberated more H2O2 at 9 mg/ml concentration were Topseal > Zimosan > EndoRez > Tubli-Seal = Kerr Pulp E.W.T. and in concentration of 18 mg/ml were Topseal > Zimosan = EndoRez > Tubli-Seal > Kerr Pulp E.W.T. The greatest liberation of in NO concentration of 9 mg/ml were LPS > Topseal > Kerr Pulp E.W.T. > Tubli-Seal = EndoRez and in concentration of 18 mg/ml were LPS > Topseal = Kerr Pulp E.W.T. > Tubli-Seal > EndoRez.
Mestre
Milica, Premović. "Reološka svojstva endodontskih silera." Phd thesis, Univerzitet u Novom Sadu, Medicinski fakultet u Novom Sadu, 2016. http://www.cris.uns.ac.rs/record.jsf?recordId=101723&source=NDLTD&language=en.
Full textIntroduction: The root canal system has a complex anatomy with main root canal and many lateral, secondary, accessory canals, apical isthmuses and deltas, as well as numerous branched dentinal tubules. Due to its complexity, the root canal system cannot be completely cleaned, shaped and disinfected using available techniques of instrumentation, irrigation and intracanal medication. The aim of root canal filling is to achieve a three-dimensional obturation of the root canal space, entomb residual bacteria and prevent their penetration into the periradicular tissue. Defining and understanding the rheological properties of endodontic sealers in different conditions contributes to the proper handling of the material according to the obturation technique applied. The aim: testing the viscoelastic properties of three different endodontic sealers, including the flow / sealer penetration into dentinal tubules in combination with different obturation techniques. Materials and Methods: The total sample consisted of 132 mesiobuccal and mesiolingual root canals of first mandibular molars. After root canal preparation using ProTaper endodontic instruments, in crown-down manner, the sample is divided into three groups depending on the tested sealers (AH Plus, Sealapex and EndoREZ) and additionally into four subgroups according to the obturation technique applied (cold lateral compaction, single-cone technique, carrier – based obturation and warm vertical compaction), making a total of 12 groups of 11 canals. After root canal obturation, the samples were sectioned horizontally at 3, 5 and 8mm from the anatomical foramen, in order to get the sections that correspond to the apical, middle and coronary third of the canal. The coronal surfaces of the sections were analyzed using scanning electron microscopy (SEM). The maximum depth of sealer penetration was measured and expressed in micrometers and as a percent of the total distance: canal dentinal wall - the outer surface of the root. The viscoelastic properties of endodontic sealers were measured using frequency sweep test on dynamic oscillatory rheometer, at four different temperatures: 25°C, 35°C, 40°C and 65°C. Results: Obturation techniques with AH Plus that applied heat and pressure produced a significantly higher depth of sealer penetration into dentinal tubules as compared to techniques that did not apply. The application of heat and pressure during obturation with Sealapex had no a significant role in the depth of sealer penetration into dentinal tubules. Obturation techniques with EndoREZ that did not apply heat and pressure produced a significantly higher depth of sealer penetration into dentinal tubules as compared to techniques that applied. The depth of penetration of all three endodontic sealers into dentinal tubules was the highest in the coronary third, followed by the second and was significantly lower in the apical third of the root canal. AH Plus, Sealapex and EndoREZ exhibited viscoelastic character with dominant values of elastic over viscous modulus, at all specified temperatures, in the range of applied frequencies and shear stresses. Complex viscosity of all sealers decreased as the frequency increased at all temperatures. AH Plus showed decreased viscosity as the temperature increased, while Sealapex and EndoREZ demonstrated opposite behavior. Correlation analysis has established a strong negative correlation between the complex viscosity of the tested sealers and the depth of penetration into dentinal tubules: the decrease of complex viscosity increase the depth of sealer penetration into dentinal tubules. Conclusion: The choice of endodontic sealer should be based on the obturation technique applied.
Lena, Jovanović. "Biokompatibilnost i marginalna adaptacija mineral-trioksid agregata, trikalcijum-silikatnog cementa i amalgama kao materijala za retrogradno zatvaranje kanala korena zuba." Phd thesis, Univerzitet u Novom Sadu, Medicinski fakultet u Novom Sadu, 2019. https://www.cris.uns.ac.rs/record.jsf?recordId=110814&source=NDLTD&language=en.
Full textBiocompatibility of materials, deployed in periapical surgery, has been a subject of debate in referential literature for some time now. Apart from biocompabillity, root end filling materials are expected to prevent bacteria from entering the surrounding tissue from canal system. The most important factors for successful long term treatment include marginal seal, i.e. adequate marginal adaptation. The aim of this research was to examine biocompatibility and establish the potential difference in biocompatibility between mineral trioxide aggregate, tricalcium silicate cement and dental amalgam according to three cytotoxicity tests, but also to corroborate marginal adaptation of the materials in question for retrograde seal of a root canal. Materials and methods: The experimental part of the research is divided in two parts. In the first part of the research biocompatibility of the materials was examined, while the examination of the marginal adaptation based on the micro images from scanning electron microscope was conducted in the second part. The examination of biocompatibility was executed on two cell lines, mouse fibroblast cell line (L929) and human cell line (MRC-5).Biocompatibility of all three types of material was examined based on three standard biocompatibility tests: DET test, MTT test, Agar diffusion test.The examination of marginal adaptation was carried out on 90 single-rooted tooth extractied human teeth of the intercanine sector of maxilla with intact pulp, mature apices, without root fractures or resorption. All teeth were endodontically treated. After the extirpation, irrigation and opturation, the resection of 3mm of root apex and retrograde preparation with ultrasonic instruments up to 3 mm depth inside the canal was done. Teeth were divided in three groups alternately. The First group include teeth which apical cavitation was filled with amalgam, in the Second group apical cavitation was filled with MTA, and in the Third group with tricalcium silicate cement. After the complete setting of the materials, teeth were cut in longitudinal manner, with fine, diamond tool. Marginal adaptation of the materials was assessed through scanning electron microscope (SEM). Software application Image J software was deployed to measure the total length of marginal fissure in micrometers in 5 pointson both sides of the preparation . The results of biocompatibility indicate high degree of cell compatibility of all tested materials. DET test did not assert any statistically significant difference in cytotoxicity between the same tested materials in both cell lines, nor between all three tested materials in both cell cultures. Comparing the results of MTT test after 24h and 48h, and 48h and 72h, it is noted that middle value of cytotoxicity index with all three tested materials and on both cell lines is lower after 48h, and after 72h, indicating the recovery of cell metabolism. In both cell cultures, with all three tested materials there is statistically significant difference between measured cytotoxicity indices after 24h and after 72h. Agar diffusion test did not show decolorization, nor cell lysis underneath the tested materials, which means that cytotoxic effect was not asserted on cell lines L929 i MRC-5. The examination of marginal adaptation was conducted according to micro images gained by scanning electron microscope. The results in the measure point 1 indicate there are significant differences between materials, and amalgam has significantly higher values of the measured fissures in relation to remaining two materials, whereas values for MTA and biodentine do not differ significantly. In measure point 5 significant differences were noted. Post hoc Mann-Whitney test shows that amalgam has lower values of the tested fissures in this measure point in relation to two other materials, while there were no significant differences between MTA i biodentine. In points 2-4, as well as points 1-5 (in total), there were no statistically significant differences in marginal adaptation of the examined materials. The results of all three tests show that there is no statistically significant difference in cytotoxicity between examined materials. MTT test shows that there is, in both cell cultures, with the same examined materials , statistically significant difference between cytotoxicity indices measured after 24h and after 72h. The results of the examination of marginal adaptation show that in point 1 amalgam has the worst seal, whereas between MTA and biodentine there is no difference. In point 5 amalgam has the best seal.
Hammad, Mohammad. "In vitro properties of novel root canal filling materials." Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.502267.
Full textKo, Hiu-wan Cora. "Quantification of microleakage of a resin-based root canal filling material." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B37344638.
Full textKo, Hiu-wan Cora, and 高曉韻. "Quantification of microleakage of a resin-based root canal filling material." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B37344638.
Full textCervi, Devanir de Araújo. "Avaliação da infiltração apical, pós tratamento de canais radiculares, utilizando 4 diferentes técnicas combinadas de instrumentação rotatória e obturação por termoplastificação. Estudo "in vitro" /." Araraquara : [s.n.], 2002. http://hdl.handle.net/11449/90422.
Full textBanca: Mario Roberto Leonardo
Banca: Jesus Djalma Pécora
Resumo: Foram utilizados 115 dentes pré molares inferiores de humanos, que foram divididos em 5 grupos de 16 dentes cada; sendo 5 grupos com 5 dentes cada, utilizados como controle positivo e, 5 grupos de 2 dentes como controle negativo. Em todos os dentes após a abertura coronária, foi realizado o desbridamento foraminal com uma lima tipo Kerr no 15 até 1mm além do forame apical e o preparo biomecânico a 1mm aquém comprimento real do dente. Foram utilizados para a instrumentação dos canais radiculares, os sistemas de limas rotatórias de níquel titânio ProFile 0.4/.06 e Quantec, e a técnica Clássica Modificada; sendo o batente apical preparado até a lima 45 de cada técnica de instrumentação. A cada troca de lima, foi utilizado o hipoclorito de sódio à 1% como solução irrigadora. Posteriormente os dentes foram obturados pelos sistemas de guta-percha termoplastificada Thermafil, Microseal e pela técnica da Condensação Lateral Ativa; utilizando como cimento obturador; AH Plus. Após as obturações os dentes foram impermeabilizados com esmalte de unha, exceto, o 1mm ao redor do forame apical; imersos no corante de azul de metileno à 2% sob vácuo e fraturados de maneira a serem obtidas duas hemi-partes. A penetração do corante foi medida com auxílio de um perfilômetro, e os dados, após análise estatística mostraram que, o grupo de dentes instrumentados pelo sistema ProFile 0.4/.06 e obturados com o sistema Thermafil, apresentaram menor infiltração apical, quando comparado com os demais grupos.
Abstract: It was evaluated 115 mandibular premolars of humans, that were divided in 5 groups of 16 teeth each; 5 groups with 5 teeth each, used as positive control and 5 groups of 2 teeth as negative control. After coronary acess, the apical patency was accomplished with a file type Kerr no 15 up to 1mm after the apical foramen and prepared to 1mm short of working length. Instrumentation wasdone, using ProFile 0,04 and 0,06 and Quantec, stotary files and the Modified Classic technique; The apical preparation used a file 45 as memory file. After each file change, sodium hypochlorite was used at 1% as irrigation solution. The teeth were filled using systems of thermoplasticized gutta-percha Thermafil, Microseal and the technique of the Active Lateral Condensation. The sealer used was the AH Plus root canal sealer. After obturation the teeth were waterproof with fingernail enamel, except, the 1mm short of the apical foramen; immerged in the coloring of methylene blue at 2% under vacuum and fractured in a way where it was obtained two hemi-parts. The penetration of the coloring was measured with aid of a Nikon Profile Projector, and the data, after statistical analysis showed that, the group of teeth under the system ProFile 0,04 and 0,06 and filled with the system Thermafil, presented lower leakage apical, when compared with other groups.
Mestre
Hughart, Donald Wayne. "Comparison of the sealing ability of two different types of root canal obturation cold lateral compaction and the continuous wave compaction technique /." Morgantown, W. Va. : [West Virginia University Libraries], 2004. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3348.
Full textTitle from document title page. Document formatted into pages; contains xi, 56 p. : ill. Vita. Includes abstract. Includes bibliographical references (p. 41-44).
Sant'Anna, Junior Arnaldo [UNESP]. "Avaliação do preenchimento de canais laterais simulados proporcionais pela guta-percha e Resilon empregando diferentes técnicas de obturação." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/104181.
Full textConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
O objetivo deste estudo foi avaliar a capacidade de preenchimento de canais laterais simulados pela guta-percha e Resilon, empregando diferentes técnicas termoplastificadoras de obturação: Condensação Vertical Aquecida (CVA), Compactação Termomecânica (CT) e Sistema Obtura II (SO). Foram utilizados 135 dentes humanos unirradiculados extraídos. Após preparo biomecânico, foram confeccionados seis canais laterais simulados em suas raízes, de acordo com a técnica proposta por Venturi et al. (2005). O diâmetro desses canais foi correspondente aos instrumentos # 08 e 10, sendo estabelecidos a 2, 5 e 8 mm do comprimento de trabalho (CT). Os espécimes foram divididos em 9 grupos (n=15), sendo: Grupo I (CVA + guta-percha Dentsply), Grupo II (CVA + Resilon), Grupo III (CVA + guta-percha Odous), Grupo IV (CT + guta-percha Dentsply), Grupo V (CT + Resilon), Grupo VI (CT + guta-percha Odous), Grupo VII (SO + guta-percha Obtura Flow 150), Grupo VIII (SO + Resilon) e Grupo IX (SO + guta-percha Odous Flow). Após a realização das obturações, os espécimes foram analisados pelos métodos radiográfico e diafanização, em função do percentual de preenchimento nos canais laterais, nos três terços. Os resultados foram submetidos ao teste de Kruskal-Wallis, com 5% de nível de significância, de acordo com avaliações específicas intra-grupos: CVA (Grupos I, II e III), CTH (Grupos IV, V e VI), SO (Grupos VII, VIII e IX) e Resilon (Grupos II, V e VIII). As avaliações CVA e CTH mostraram que o Resilon apresentou maior capacidade de preenchimento nas duas análises, em relação aos demais materiais, nos terços apical e médio (p<0,05). Quanto à avaliação SO, todos os materiais apresentaram boa capacidade de preenchimento dos canais laterais em todos os terços, com exceção do terço cervical onde o Resilon foi...
The aim of this study was to evaluate the ability of gutta-percha and Resilon to fill simulated canals using different thermoplastic obturation techniques: Warm Vertical Compaction (CVA), Thermomechanical Compaction (CTE) and Obtura II System (SO). It was used 135 extracted human teeth uniradicular. After biomechanical preparation, six simulated lateral canals were prepared in the roots, according to the technique proposed by Venturi et al. (2005). The diameter of these canals was equivalent to # 08 and 10 instruments and are set at 2, 5 and 8 mm to working length (WL). The specimens were divided into nine groups (n=15), as follow: Group I (CVA + gutta-percha Denstply), Group II (CVA + Resilon), Group III (CVA + gutta-percha Odous), Group IV (CTE + gutta-percha Dentsply), Group V (CTE + Resilon), Group VI (CTE + gutta-percha Odous), Group VII (SO + gutta-percha Obtura Flow 150), Group VIII (SO + Resilon) and Group IX (SO + gutta-percha Odous Flow). After the obturation, the samples were analyzed by radiographic and clearing methods, according to percentage of filling the lateral canals, in the three thirds. The result were submitted to the Kruskal-Wallis test at 5% significance level, according to specific intra-group evaluations: CVA (Groups I, II and III), CTH (Groups IV, V and VI), SO (Groups VII, VIII and IX) and Resilon (Groups II, V and VIII). CVA and CTH assessments showed that the Resilon has great ability to fill lateral canals in the two tests, compared to the other materials, in the apical and middle thirds (p < 0.05). As for SO evaluation, all materials showed good filling capacity of the lateral canals in all thirds, except in the cervical third where Resilon was better by radiographic analysis (extension and area) and in the cervical and middle thirds for clearing analysis (extension)... (Complete abstract click electronic access below)
Asheibi, Fatma K. "Investigation of selected properties of a resin-based root canal filling material : an in vitro study." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/investigation-of-selected-properties-of-a-resinbased-root-canal-filling-material-an-in-vitro-study(0b248ec8-f664-4772-94be-857ba302015b).html.
Full textSpencer, David Lowell. "Physical and Chemical Properties of a New Mineral Trioxide Aggregate Material." VCU Scholars Compass, 2004. http://scholarscompass.vcu.edu/etd/647.
Full textBonifacio, Kleber Cortes. "Técnicas adesivas de obturação - Avaliação microscópica quantitativa da reparação apical e periapical pós-tratamento de canais radiculares de dentes de cães com lesão periapical." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/58/58135/tde-04102013-163232/.
Full textThe aim of this study was to evaluate quantitatively, in vivo, the response of apical and periapical tissues of dog\'s teeth with experimentally induced chronic periapical lesion, after endodontic treatment and root canal filling using the following sealers: EndoREZ, Real Seal and Sealapex. Non-filled root canals (intracanal dressing) were used as control. After induction of the experimental periapical lesions, the teeth were subjected to coronal access, neutralization of the necrotic content, biomechanical preparation, placement of an intracanal dressing with a calcium hydroxide paste (Calen), and root canal filling with the different endodontic sealers mentioned above. After 30 and 90 days, the animals were euthanized and the material was subjected to histotechnical processing. A quantitative microscopic analysis was performed using an Axio Imager.M1 (Zeiss) microscope coupled to an AxioCam MRc5 (Zeiss) camera. A complete description of the characteristics of the apical and periapical tissues was performed and the number of inflammatory cells, size of the periapical lesions (in mm2), presence of bone resorption and presence of sealing of the apical opening with mineralized tissue deposition was determined on microscopic images obtained from hematoxylin and eosin-stained histological sections, using the Software AxioVision Rel.4.6 (Automatic Measurements Programs Program Wizard). Data were examined for their distribution and the compared using analysis of variance (ANOVA) followed by Tukeys post-test with a 5% significance level. Presence and extension of an inflammatory infiltrate, predominantly mononuclear, beyond half of the periodontal ligament was observed for all sealers, at both 30-day and 90-day periods. There was no modulation of the inflammatory infiltrate for any of the sealers because the number of inflammatory cells was similar at both 30-day and 90-day periods (p>0.05). Bone and radicular resorption areas were found in approximately 50% of the cases at 90 days for EndoREZ and Real Seal, and in 30% of the cases at the 30-day and 90-day periods for Sealapex. The periapical lesion size was similar at both experimental periods (30 and 90 days) for all evaluated sealers. Finally, sealing of the apical opening with mineralized tissue deposition was observed at 90 days in approximately 20%, 30% and 50% of the cases for EndoREZ, Real Seal and Sealapex, respectively; and in 15% dos cases, at the 30-day period, only for Sealapex. Within the limitations of this experiment, it may be concluded that the resin-based sealers EndoREZ and Real Seal were not well tolerated by the apical and periapical tissues. Periapical tissue repair, with cementum deposition, was found in the teeth filled with Sealapex, although complete repair of the periapical lesions was not observed.
Neto, Felix Nina. "InfluÃncia do material e tÃcnica de obturaÃÃo endodÃntica na resistÃncia à fratura de raÃzes dentais humanas." Universidade Federal do CearÃ, 2009. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=3033.
Full textGutta-percha, in combination with a variety of sealers, is the most commonly used material for root canal filling. This association presents no adhesiveness to the root structure. Resilon cones and resinous cement (Epiphany) were introduced on the market that, in association with a self-conditioning primer, would alow a solid monoblock to be obtained. The Resilon/Epiphany system forms a monoblock within the canals that bonds to the dentin walls. It has potential to strengthen the walls against fracture. The material was proposed as an alternative to gutta-percha. The purpose of this in vitro study was to evaluate the fracture resistance of root canals filled with gutta-percha/ AH Plus and root canals filled with Resilon/Epipanhy system. Sixty extracted single rooted teeth were selected. The teeth were randomly categorized into 6 groups of 10 teeth each as follows: Group I: teeth without endodontic treatment; Group II: teeth were instrumented but without endodontic obturation; Group III: teeth were instrumented and obturated with gutta-percha in conjunction with AH Plus sealer and obturated with lateral condensation technique; Group IV: teeth were instrumented and obturated with gutta-percha in conjunction with AH Plus sealer and obturated with hybrid Tagger`s techinique; Group V: teeth were instrumented and obturated with Resilon/Epiphany system and obturated with lateral condensation technique; Group VI: teeth were instrumented and obturated with Resilon/Epiphany system and obturated with hybrid Tagger`s technique. The roots were submited to the compressive test. A Kratos Universal Testing Machine was used to apply a load to each specimen at a crosshead speed of 0,5mm per minute until the root fracture. The results were submited to ANOVA test ( 5%) and Tukey test. With respect to the fracture resistance there was no statiscally significant difference between the group filled with gutta-percha and the Resilon/Epiphany system. However, the group VI showed statistically significant difference when compared with group I and group II. The presence of the endodontic material is very important to maintenance the good fracture resistance, because the group II showed the worst results. The thermoplastic technique presented better results, but within statistically significant differences.
Hales, Jason J. "Development of antibiotic resistance due to chromosomal mutation caused by AH26 endodontic sealer." Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2304.
Full textAH26 is a registered trademark. Title from document title page. Document formatted into pages; contains vii, 55 p. : ill. (some col.). Includes a video file in the AVI format. Vita. Includes abstract. Includes bibliographical references (p. 48-53).
Hsieh, Hsin-Ju. "A case series study of Vitapex® pulpectomy treatment in primary teeth II." Thesis, Birmingham, Ala. : University of Alabama at Birmingham, 2007. https://www.mhsl.uab.edu/dt/2007m/hsieh.pdf.
Full textSouthern, Rodney George. "Comparison of the obturation density of resilon[TM] using cold lateral condensation and varying continuous wave of condensation techniques." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4683.
Full textTitle from document title page. Document formatted into pages; contains vii, 47 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 35-38).
Águeda, Cristiana Filipa Moutinho. "Materiais de obturação do sistema de canais radiculares." Master's thesis, [s.n.], 2014. http://hdl.handle.net/10284/4588.
Full textIntrodução: Desde a década de 1910, a evolução dos materiais de obturação endodôntica tem-se focado principalmente sobre a química e as propriedades destes materiais como uma parte técnica e biologicamente importante da obturação. Deste modo, os materiais de obturação têm vindo a ser desenvolvidos de modo a melhorar a sua adaptação às paredes dos canais radiculares e às suas irregularidades. Objetivos: Este trabalho tem como objetivo principal efetuar uma revisão bibliográfica sobre alguns materiais usados no Tratamento Endodôntico Não Cirúrgico, na fase de obturação, de modo a consciencializar e apresentar os diferentes tipos de materiais de obturação que existem no mercado de trabalho. Materiais e métodos: Para a elaboração deste trabalho foi realizada uma pesquisa bibliográfica recorrendo aos seguintes motores de busca: Google Scholar, PubMed, Scielo e ScienceDirect com as seguintes palavras-chave: “Activ GP obturation system”; “Bioceramic”; “Filling materials endodontics”; “Termoplastic gutta-percha”; “Obturation material”; “Mineral Trioxide Aggregate”; “Resilon”; “Resin cement”; “Resin material for root canal obturation”; “Resin sealer”;“Root canal”; “Root canal sealing”; “Root canal filling materials”. Como critério de inclusão estabeleceu-se que os artigos deveriam ser em Português, Inglês ou Espanhol, publicados entre 2003 e 2014. Dos resultados apresentados foram utilizados 75 artigos, pesquisados entre Setembro de 2013 e Setembro de 2014. Desenvolvimento: Ao longo do tempo têm vindo a ser desenvolvidos diversos materiais de obturação como a guta-percha, resilon e cones de guta-percha revestidos apresentando cada um destes materiais características físico-quimicas e biológicas diferentes e consequentemente com propriedades distintas. Em relação aos cimentos de obturação analisaram-se igualmente diversos materiais com composições químicas e propriedades também diferentes. O xido de zinco eugenol o hidr xido de cálcio a resina ep xi o MTA e o cimento biocer mico foram abordados na perspetiva de verificar quais os que satisfazem os requisitos de um cimento de obturação ideal. Conclusão: Com este trabalho podemos deduzir que a guta-percha ainda é considerada o material de obturação ideal para o preenchimento de canais radiculares e em relação aos cimentos os que apresentam melhores propriedades são os cimentos de MTA e os biocerâmicos embora não sejam os mais utilizados a nível clínico. A eleição do cimento a ser utilizado deve fundamentar-se no conhecimento básico dos materiais disponíveis, as necessidades do paciente, perícia e experiência do Médico Dentista. Em virtude de terem surgido nos últimos tempos novos cimentos, o Médico Dentista deve ter conhecimento suficiente para escolher o material para cada situação clinica. Introduction: Since the 1910s, the evolution of endodontic materials has primarily focused on the chemistry and cement properties as a biologically important part of the root canals filling process. Thus, the filling materials have been developed in order to improve its adaptation to the root canal walls and its irregularities. Objectives: This study aims to perform a literature review of some materials used in Non-Surgical Endodontic Treatment, at the stage of closing, so as to raise awareness and present the different types of filling materials that exist in the labor market. Materials and methods: To prepare this paper, a literature search was performed in the database Google Scholar, PubMed, ScienceDirect and SciELO with the following keywords: “Activ GP obturation system”; "Bioceramic"; "Filling materials endodontics"; "Termoplastic gutta-percha"; "Obturation material"; "Mineral Trioxide Aggregate"; "Resilon"; "Resin Cement"; "Resin material for root canal obturation"; "Resin sealer", "root canal"; "Root canal sealing"; "Root canal filling materials". It was established, like inclusion criteria, that the articles should be in English, Portuguese or Spanish, published between 2003 and 2014. Thus, 75 articles were included in this work, surveyed between September 2013 and September 2014. Discussion: Over time, were developed some obturation materials and cements like gutta-percha, resilon and coated gutta-percha cones, which present diverse physicochemical and biological characteristics and consequently different properties. Regarding the filling cements, it is also examined several materials, having chemical compositions and different properties. Zinc oxide eugenol, calcium hydroxide, the epoxy resin, the MTA and the bioceramic cement were addressed in the perspective of check which of them can it be the ideal cement filling. Conclusion: With this paper we can assert that gutta-percha is still considered the ideal filling material for filling root canals and regarding the filling cements, those with the best properties are the MTA and bioceramic cements although are not the most used at clinical level. The election of the cement to be used should be grounded in the basic knowledge of the available materials, the type of restoration, patient needs and dentists expertise and experience. Because new cements have emerged in recent times, the Dentist should have enough knowledge to choose the appropriate material for each clinical situation.
Abreu, Ricardo Toledo. "Análise da cimentação e da resistência de união de dois diferentes tipos de pinos de fibra de vidro em dentes com reabsorções radiculares internas simuladas /." São José dos Campos, 2019. http://hdl.handle.net/11449/180530.
Full textCoorientador: Carlos Rocha Gomes Torres
Banca: César Rogério Pucci
Banca: Flávia Goulart da Rosa Cardoso
Resumo: Este estudo analisou a interface de união e a força de adesão dos pinos de fibra de vidro Rebilda Post (RP) (VOCO) e Rebilda Post GT (GT) (VOCO) após cimentação em dentes com Reabsorção Radicular Interna (RRI) simulada. Quarenta e cinco raízes de pré-molares inferiores humanos foram padronizadas em 16 mm e incluídas em resina acrílica. Os canais radiculares (CR) foram preparados biomecanicamente, as raízes foram seccionadas em sua metade e a RRI foi simulada. Os segmentos foram retornados à posição original com auxílio de parafusos. Uma pasta de Ca(OH)2 permaneceu como MIC por 15 dias. A remoção foi feita por PUI e a qualidade da limpeza foi avaliada por estereomicroscopia. Os CR das amostras foram obturados e o preparo foi feito de forma padronizada. Os espécimes foram divididos em 2 grupos (n=20), de acordo com o tipo de pino cimentado. A resistência de união foi avaliada aos níveis cervical e da RRI pelo teste push-out. Para a análise estatística só foram incluídas falhas adesivas e predominantemente adesivas. Os resultados foram submetidos ao teste de Kruskal-Wallis, Mann Whitney e teste de Dunn (α = 0,05). Foi realizada MEV para análise da interface de união entre cimento e dentina radicular (n=1) e análise por microtomografia computadorizada (micro-CT) do pino GT (n=3). PUI não foi capaz de limpar completamente a maioria das RRI (62,5%). Houve alteração da resistência adesiva entre todos os grupos (p <0,05). Os valores de resistência de união para ambos os grupos na reg... (Resumo completo, clicar acesso eletrônico abaixo)
ABSTRACT : This study analyzed the adhesion interface and bond strength of Rebilda Post (RP) (VOCO) and Rebilda Post GT (GT) (VOCO) glass fibers after cementation in teeth with simulated Internal Root Resorption (IRR). Forty-five roots of lower human premolars were standardized at 16 mm and included in acrylic resin.The root canals (RC) were prepared biomechanically, the roots were sectioned and the IRR was simulated.The segments were returned to original position with the aid of screws. A Ca(OH)2 paste remained as MIC for 15 days.The removal was done by PUI and the quality of the cleaning was evaluated by stereomicroscopy. The RC of the samples were filled and the preparation was done in standardized way. The specimens were divided into 2 groups (n=20), according to the type of cemented post. The bond strength was evaluated at the cervical and RRI levels by the push-out test. For the statistical analysis only adhesive and predominantly adhesive failures were included. The results were submitted to Kruskal-Wallis test, Mann Whitney test and Dunn test (α =.05). SEM was used to analyze the bond interface between cement and dentin root (n=1) and Microcomputed tomography (micro-CT) analysis of the GT post (n=3). PUI was not able to clear completely the majority of RRI (62.5%). There was alteration of the adhesive resistance between all groups (p <.05). The values of bond strength for both groups in the cervical region were higher in relation to the groups in the RRI region.The SEM showed formation of resin tags at the bond interface between resin cement and root dentin for both groups. In micro-CT analysis, the presence of bubbles in the cement and spaces in the bond interface between cement are visible. The adhesion of both posts was affected negatively by the level of cementation, post adaptation in the root canal and presence of IRR. Rebilda Post presented better ...(Complete abstract click electronic access below)
Mestre
Connor, Catherine Erwin. "A model combining fluorescent microscopy and culture inhibition to evaluate bacterial activity of calcium hydroxide medicaments." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1285.
Full textTitle from document title page. Document formatted into pages; contains vii, 82 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 47-52).
Ueda, Julio Katuhide. "Estudo in vitro da resistência à fratura de raízes debilitadas. Efeito de diferentes tratamentos restauradores /." Araraquara: [s.n.], 2007. http://hdl.handle.net/11449/101362.
Full textBanca: Marcelo Ferrarezi de Andrade
Banca: Osmir Batista de Oliveira Junior
Banca: Paulo Afonso Silveira Francisconi
Banca: Luiz Alberto Formighieri
Resumo: A preservação e a restauração de dentes despolpados severamente debilitados é um procedimento complexo e relativamente imprevisível. Este estudo avaliou a resistência à fratura de raízes bovinas experimentalmente debilitadas, reconstruídas internamente com diferentes materiais restauradores em combinação com pinos pré-fabricados de fibra de vidro comparados com raízes íntegras restauradas com núcleo metálico fundido ou pino de fibra de vidro. Foram selecionadas raízes de 120 (n=15) incisivos bovinos inferiores de dimensões semelhantes, dos quais, 90 foram internamente preparados para simular uma raiz debilitada. Todas as raízes foram preenchidas com diferentes materiais restauradores e os espécimes foram submetidos ao teste de resistência ao fracasso/ fratura com a aplicação de uma carga compressiva tangencial a um ângulo de 135º em relação ao longo eixo axial das raízes. Resultados indicaram diferenças estatisticamente significante entre os grupos. As raízes debilitadas restauradas com núcleo metálico fundido (grupo NMF-RD) demonstraram os mais baixos valores de resistência à fratura (107.7436 N), sendo estatisticamente diferentes dos demais grupos. As raízes íntegras restauradas com núcleo metálico fundido (NMF-RI) mostraram os maiores valores de resistência (362.3308 N), mas com diferenças estatisticamente significantes somente quando comparadas às raízes debilitadas restauradas com cimento resinoso dual (Variolink II, Ivoclar Vivadent - grupo Vario-RD), cimento resinoso autopolimerizável (Multilink, Ivoclar Vivadent - grupo Multi-RD) e cimento de ionômero de vidro modificado por resina (Vitremer, 3M ESPE - grupo Vitre-RD) associado com pino de fibra de vidro... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The preservation and restoration of severely weakened pulpless teeth is a difficult and relatively unpredictable procedure. This study evaluated the resistance to fracture of experimentally weakened bovine roots internally reconstructed with different filling materials in combination with prefabricated fiberglass posts compared with restored roots that were relatively intact. The roots of 120 mandibular bovine incisors with similar bulks were selected. Of these, 90 were internally prepared to standardized dimensions, thereby simulating weakness. All roots were filled with different restorative materials. The specimens were submitted to the fracture resistance testing with the application of a tangential compressive loading at an angle of 135º in relation to the long axes of the roots. Results indicated statistically significant differences among the groups. The weakened roots restored with the cast post-core (group NMF-RD) demonstrated the lowest fracture resistance values (107.7436 N), which were significantly different from the averages of the remaining groups. The healthy roots restored with the cast post-core (group NMF-RI) showed the highest values (362.3308 N), but statistically significant differences were observed only when compared with weakened roots restored by the dual-cured resin cements (Variolink II, Ivoclar Vivadent - group Vario-RD), chemically cured resin cements (Multilink, Ivoclar Vivadent - group Multi-RD) and resin-modified glass-ionomer cement (Vitremer, 3M ESPE - group Vitre-RD) associated with fiberglass posts. There was not statistically significant differences among the groups of the weakened roots restored with self-adhesive universal resin cement (RelyX Unicem, 3M ESPE - group Unicem-RD), composite resin (Tetric 15 Ceram, Ivoclar Vivadent - group Tetric-RD), group Vitre-RD and group Vario-RD... (Complete abstract click electronic access below)
Doutor
Lopes, Rafael Paiva. "Avaliação da permeabilidade dentária de dentes submetidos à reintervenção endodôntica quando obturados com diferentes cimentos." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/23/23145/tde-16012012-143744/.
Full textThe purpose of this study was to evaluate ex vivo the permeability of root canal dentin walls after the removal of three different combinations of filling materials. To this end, 36 extracted human single-rooted premolars, with similar length and anatomy, had surgery access to the pulp chamber, root canal preparation was performed to F4 ProTaper instruments and filling with one of the following associations of filling materials: G1 - gutta-percha and Fill Canal cement (n = 10); G2 - gutta-percha and AH Plus cement (n = 10); G3 - Resilon cones and Epiphany cement (n = 10). Six specimens were prepared but its canals were not filled for positive control. After 24 hours at 37 ° C, the canals were desobturated, making use of NRT rotary instruments , # 40 K-type files and orange oil based solvent. After the removal of the filling material, specimens were sealed and tested for impregnation of dye in 1% methylene blue for 24 hours in the absence of vacuum. The teeth were then washed in running water for 24 hours, had their crowns amputated and the roots sectioned horizontally into 1 mm slices. For each root third , one section was selected and photographed, the images were stored on computer and the percentage of stained dentin in each section was calculated using a graphical analysis software. The results showed a statistically significant difference between experimental groups and control group (p <0.05). However, there was no statistical difference between experimental groups (p> 0.05). Thus, it was concluded that the type of filling material does not influence dentin permeability after its removal.
Guinesi, Adriana Simionatto [UNESP]. "Avaliação de solubilidade e desintegração, alteração dimensional e resistência à compressão de cimentos endodônticos." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/90413.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O propósito do presente estudo foi avaliar os cimentos endodônticos Acroseal, AH Plus, Epiphany e Polifil (cimento endodôntico experimental), no que se refere às propriedades de solubilidade e desintegração, alteração dimensional e resistência à compressão. Os testes seguiram a Norma ISO 6876-2, de 2001 e ISO 9917-1, de 2003. Nos testes de solubilidade e desintegração foram utilizados moldes de teflon (4mm de espessura, 12mm de diâmetro interno e 2mm de parede) preenchidos com cimentos endodônticos e contendo perfuração com fio de nylon para suspensão das amostras. Os espécimes foram levados à estufa até a presa dos materiais. Em seguida, as amostras hidratadas e desidratadas tiveram sua massa mensurada imediatamente após sua retirada da estufa, e após períodos de 24h, 48h, 72h, 7, 14, 30, 60 e 90 dias. A solubilidade dos cimentos endodônticos foi identificada pela alteração da massa de cada amostra, expressa como o percentual de massa perdida em comparação à massa inicial. A desintegração foi identificada visualmente, pela observação de resíduos nos recipientes e pela turbidez da água destilada. Nos testes de alteração dimensional e resistência à compressão foram utilizados moldes de teflon (12mm de espessura e 6mm de diâmetro). Os moldes foram preenchidos com cimentos endodônticos e levados à estufa até a tomada de presa, então foram removidos dos moldes e, para os testes de alteração dimensional, suas dimensões foram medidas, no sentido longitudinal, com paquímetro digital, imediatamente após sua retirada da estufa e após períodos de 24, 48 e 72 horas, 7, 14, 30, 60 e 90 dias de armazenamento. A alteração dimensional foi identificada como a percentagem de alteração volumétrica no final de cada período, em comparação ao período inicial.
Considering all the steps of the endodontic therapy, their success depend on the root canals sealing when the professional uses an endodontic sealer that gathers physical, chemical and biological properties. The aim of this study was to evaluate the endodontic sealers: Acroseal, AH Plus, Epiphany and a castor-oil based experimental sealer (Polifil) concerning the properties of solubility and disintegration, dimensional change and compressive strength. All of these tests were supposed to follow the ISO Specification 6876-2, 2001 and ISO Specification 9917-1, 2003. To perform the solubility and disintegration tests teflon rings (4 mm thickness, 12 mm of internal diameter, and 2 mm height) filled with the endodôntico sealers were used, containing perforations that allow a nylon wire passing through it, in order to get the specimens raised up. They were storaged in the oven under 37º C up to the setting time. The specimens were hydrated and dehydrated to be weighted for 24h, 48h, 72h, 7, 14, 30, 60 and 90 days. The solubility of the endodontic sealers was identified as a percentage obtained through the difference between the last measure of weight and the initial one. The disintegration were visually identified by observating the residues and the water’s whirlwind. Teflon moulds (12 mm thickness and 6mm diameter) were used in dimensional change and compressive strength tests. They were filled with the endodontic sealers and storaged in the oven under 37º C up to the setting time. Afterwards, the moulds were removed and then, for the dimensional change test, they were measured under the longitudinal position with digital pachymeter for 24h, 48h, 72h, 7, 14, 30, 60 and 90 days. The dimensional change was identified as a percentage of the volumetrical change gotten in each time, compared with the first specimen.
Silveira, Geraldine Faccio da. "Análise da termoplasticidade e adesividade da guta-percha e resilon /." Araraquara : [s.n.], 2010. http://hdl.handle.net/11449/95383.
Full textBanca: José Maurício dos Santos Nunes Reis
Banca: Yara Teresinha Correa Silva Sousa
Resumo: Objetivo: Analisar a termoplasticidade da guta-percha e Resilon®, submetidos à diferentes condições de testes de termoplastificação, bem como resistência de união dos mesmos à diferentes cimentos endodônticos. Metodologia: Para os testes de termoplasticidade, corpos-de-prova foram confeccionados com dimensões padronizadas dos seguintes materiais: guta percha convencional (GCO); guta percha termoplástica (GTP) e cones Resilon® (RE). Após 24 h, os corpos-de-prova foram submetidos às temperaturas de 50 °C, 60 °C ou 70 °C por 60 segundos conforme o grupo avaliado. Em seguida, receberam uma carga compressiva de 1,0; 3,0 ou 5,0 kg. As imagens dos corpos de prova antes e após os testes foram digitalizadas e analisadas. A capacidade de plastificação dos materiais foi determinada pela diferença das áreas final e inicial dos corpos-de-prova. Para teste de resistência de união, os corpos-de-prova foram confeccionados com dimensões padronizadas para cada material sólido testado: guta-percha convencional (GCO), guta-percha termoplastica (GTP), Resilon® (RE) e Obtura II® (OBT). Os cimentos, AH Plus® (AHP), Endofill (EF), Sealer 26 (S26) e Epiphany SE®. (ESE), foram inseridos em cilindros de alumínio dotados de alça lateral nos quais foram conectados os discos padronizados de cada material. Foi realizado o teste de tração em Máquina de Ensaios Mecânicos Emic DL 2000. Desta forma, dois estudos foram realizados. Na primeira análise os espécimes foram divididos em 12 grupos: grupo 1 (GCO + AHP); grupo 2 (GCO + EF); grupo 3 (GCO + S26); grupo 4 (GCO + ESE); grupo 5 (GTP + AHP); grupo 6 (GTP + EF); grupo 7 (GTP + S26); grupo 8 (GTP + ESE); grupo 9 (RE + AHP); grupo 10 (RE + EF); grupo 11 (RE + S26) e grupo 12 (RE + ESE). A segunda análise correspondeu à avaliação da resistência de união das associações: grupo 1 (OBT + AHP); grupo 2 (OBT + ESE); grupo 3 (RE + AHP)... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Aim: The aim of the study was to evaluate the thermoplasticity and bond strength properties of conventional and thermoplastic gutta-percha and Resilon. Metodology: To thermoplasticity test, specimens with standardized dimensions were fabricated from the materials: conventional and thermoplastic Endopoints gutta-percha, and Resilon. After 24 h, the specimens were placed in water at 50º, 60º or 70 oC for 60 seconds and thereafter positioned between two glass slabs. Each set was compressed by a 1,0; 3,0 or 5,0-kg weight. Digital images of the specimens before and after compression were obtained and analyzed. The thermoplasticity of each material was confirmed by the difference between final and initial areas of each sample. To the analyze of conventional, thermoplastic gutta-percha and Resilon, disks were prepared with standardized dimension: convencional gutta-percha (GCO), thermoplastic gutta-percha (GTP), Resilon (RE) and Obutra II (OBT). The root canal sealers: AH Plus (AHP), Endofill zinc oxide and eugenol sealer (EF), Sealer 26 epoxy.resin sealer (S26), and Epiphany SE methacrylate-based sealer (ESE) were inserted in to metallic rings .The metallic rings were positioned over the core material disks and after set of the sealers the specimens were subjected to tensile bond strength testing using a mechanical testing machine (0.5 mm/min). The ultimate tensile bond strength was expressed in MPa. The first analysis, 12 groups were made: group 1 (GCO + AHP); group 2 (GCO + EF); group 3 (GCO + S26); group 4 (GCO + ESE); group 5 (GTP + AHP); group 6 (GTP + EF); group 7 (GTP + S26); group 8 (GTP + ESE); group 9 (RE + AHP); group 10 (RE + EF); group 11 (RE + S26) and group 12 (RE + ESE). For the second analysis, 4 groups were evaluated: group 1 (OBT + AHP); group 2 (OBT + ESE); group 3 (RE + AHP) e group 4 (RE + ESE).All data were statistically analyzed by ANOVA (P<0.05)... (Complete abstract click electronic access below)
Mestre
Figueiredo, Mariana Diehl. "Influência de soluções irrigadoras na resistência adesiva de pinos de fibra de vidro utilizando cimento resinoso : avaliação através do teste de push-out /." São José dos Campos : [s.n.], 2011. http://hdl.handle.net/11449/90376.
Full textBanca: Renato Miotto Palo
Banca: Márcia Carneiro Valera
Resumo: Atualmente, os pinos de fibra de vidro têm surgido como uma alternativa para restaurar dentes tratados endodonticamente. Entretanto, a perda da retenção do pino é uma das principais causas de falhas. Portanto, o objetivo deste estudo foi avaliar a resistência de união e o tipo de falha adesiva, em diferentes regiões da raiz, de pinos de fibra de vidro transparente cimentados no canal radicular com cimento de cura dual, variando-se a solução irrigadora utilizada durante o preparo dos canais, através do teste de push-out. Para o estudo, foram utilizados 30 dentes humanos, todos igualmente preparados. No momento da cimentação dos pinos, as soluções irrigadoras foram: solução de soro fisiológico, hipoclorito de sódio 2,5% e solução de clorexidina 2%; e o cimento resinoso utilizado foi de cura dual. Após a cimentação, os espécimes foram seccionados, obtendo-se 2 fatias de aproximadamente 2 mm cada, suas faces cervicais foram marcadas, e então, submetidas ao teste de push-out. Foram realizados os testes ANOVA e Tukey, com nível de significância de 5 %, para a análise do ensaio mecânico e realizada análise qualitativa do tipo de falha ocorrida. Pôde-se observar que o grupo irrigado com hipoclorito de sódio 2,5% apresentou menor valor da média de resistência adesiva (3,870 ± 3,799 MPa), comparado com o grupo da clorexidina 2% (4,215 ± 2,098 MPa) e com o grupo do soro (4,510 ± 1,186 MPa). Já em relação aos terços, a região média foi a que apresentou maior valor da média de resistência adesiva (4,803 ± 3,14 MPa) quando comparado com a região cervical (3,593 ± 1,717 MPa), porém não houve diferença estatística significante, nem entre as regiões e nem entre as soluções irrigadoras. A maioria das falhas ocorridas foram do tipo adesiva 70%, enquanto que 23,33% foram fraturas coesivas, e 6,66% foram do tipo mistas. Assim, é possível concluir que os ... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Currently, the fiberglass posts have emerged as an alternative to restore endodontically treated teeth. However, the loss of retention of the pin is a major cause of failure. Therefore, the aim of this study was to evaluate and compare the bond strength of transparent fiberglass posts, using a dual cure cement, varying the irrigating solution used during the preparation of the root canals through the push-out test and then a qualitative analysis of types of adhesion failures was made by reading into a stereomicroscope. For the study, 30 human teeth were used, all equally prepared. At the time of cementation of the posts, the irrigating solutions were: normal saline solution, sodium hypochlorite 2.5%, and 2% chlorhexidine solution, and the resin cement used was dual-curing. After cementation, specimens were sectioned, yielding two slices of about 2 mm each, their cervical faces were marked, and then subjected to push-out test, the data obtained were analyzed by descriptive and inferential statistics. The tests performed were ANOVA and Tukey, with a significance level of 5% for the analysis of mechanical test, and the type of failure occurred was qualitatively evaluated. It could be observed that the group irrigated with sodium hypochlorite 2.5% showed the lowest mean bond strength (3.870 ± 3.799 MPa), compared with 2% chlorhexidine group (4.215 ± 2.098 MPa) and the normal saline solution group (4.510 ± 1.186 MPa). In relation to the thirds, the middle region showed the highest value of bond strength average (4.803 ± 3.14 MPa) compared with the cervical (3.593 ± 1.717 MPa), but differences were not statistically significant, nor between regions nor between irrigating solutions. Most failures were adhesive type 70%, while 23.33% were cohesive fractures, and 6.66% were mixed type. Thus, we conclude that the irrigation protocols evaluated in this study did not exert effects on the bond ... (Complete abstract click electronic access below)
Mestre
Souza, Erick Miranda [UNESP]. "Avaliação da qualidade da obturação de canais radiculares e da confiabilidade do modelo de penetração de glicose." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/101641.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Diferentes técnicas de compactação da guta-percha (GP) e cimentos oburadores podem alterar a qualidade final da obturação do canal radicular. Recentemente foi introduzido um novo modelo de análise da qualidade de obturações endodônticas baseado na mensuração da concentração da glicose que passa pela falha na obturação. Este trabalho é composto por três capítulos cujos objetivos foram: a) determinar os efeitos de variações na técnica de condensação lateral (LC) e da área do canal na qualidade da obturação; b) verificar se diferentes materiais obturadores alteram a concentração do traçador utilizado no modelo de penetração de glicose, e; c) determinar se são similares os resultados de infiltração dos mesmos espécimes avaliados pelos modelos de penetração de glicose e transporte de fluidos. No primeiro estudo sessenta caninos humanos foram instrumentados e divididos em três grupos obturados por diferentes técnicas de LC e cimento AH Plus. Uma nova técnica usando uma seqüencia de espaçadores antes da colocação de um cone acessório foi comparada com duas técnicas comumente utilizadas. As raízes obturadas foram seccionadas nos níveis 3 mm e 6 mm a partir do ápice e as secções fotografadas. Usando um software de análise de imagens, as áreas do canal e de GP em cada nível foram mensuradas e a porcentagem de área obturada por guta-percha (PGP) foi calculada. Análise múltipla de variância foi utilizada para verificar as variáveis influenciando a PGP. Teste de regressão linear foi utilizado para verificar a influência da área do canal na PGP em cada nível de secção. Em ambas as secções o canal mais largo foi 2-3 vezes maior que o menos largo. Quanto maior a área do canal, menor a PGP nos níveis 6 mm (r2=0,154, P=0,02) e 3 mm (r2=0,119, P=0,007). A PGP no nível 3 mm foi menor que a 6 mm (P=0.003). A nova técnica atingiu maior PGP que as demais em ambos os níveis (P<0.05).
Different gutta-percha (GP) compaction techniques and root canal sealers may affect the final quality of the root canal filling. Recently, it was discussed a new method for evaluation of the quality of root fillings based on measuring the concentration of the glucose that penetrates through voids in the obturation. This work is divided in 3 chapters aiming to: a) determine the effects of different techniques and canal area on the quality of laterally compacted root fillings; b) verify whether different filling materials react with the tracer used in the glucose penetration model, and; c) determine whether leakage results of the same specimens measured by the glucose penetration and fluid transport are comparable. In the first study sixty extracted canines were instrumented to the same size and equally divided in three groups filled with laterally compacted GP cones and AH Plus sealer using different techniques. A new technique with use of a sequence of spreaders prior to the accessory cone placement was compared to two commonly used techniques. The filled roots were horizontally sectioned at 3 mm and 6 mm from the apex and micro-photographs of the cross-sections were taken. Using an image-analysis software, the canal and GP areas at each level were measured. The percentage of gutta-percha filled canal area (PGP) was calculated. A Multivariate analysis was used to account for the variables influencing the PGP. Linear regression test was used to verify the influence of canal area on PGP. At each level the largest canal was 2-3 times larger than the smallest. The larger the canal area, the lower the PGP at 6 mm level (r2= 0.154, P=0.02) and at 3 mm level (r2=0.119, P=0.007). The PGP at 3 mm was lower than at 6 mm (P=0.003). The new technique achieved higher PGP than other techniques (P=0.00002).
Takahashi, Karine [UNESP]. "Avaliação da resposta tecidual às pastas Guedes Pinto e de hidróxido de cálcio: análise edemogênica e ao microscópio óptico, em ratos." Universidade Estadual Paulista (UNESP), 2004. http://hdl.handle.net/11449/95453.
Full textConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Com o propósito de avaliar a resposta biológica imediata e tardia das pastas Guedes Pinto e de hidróxido de cálcio, materiais obturadores de canais de dentes decíduos, foram empregados o Teste Edemogênico e implantes em alvéolos. Para o teste edemogênico, foram utilizados 20 ratos machos, que após anestesia geral, receberam injeção intravenosa de Azul de Evans 1%. Decorridos 30 minutos, foi injetado 0,2ml de uma das pastas na região subcutânea dorsal do animal. Os animais foram sacrificados, nos períodos pós-operatórios de 3 e 6 horas, e as peças obtidas colocadas em formamida por 72 horas. Então realizada as leituras de absobância em espectrofotômetro com comprimento de onda de 630 nm. Para a análise morfológica, 48 ratos sofreram exodontia do incisivo central superior direito. Um implante de tubo de polietileno contendo uma das pastas foi posicionado no alvéolo, para análise após 7 e 28 dias. A pasta de hidróxido de cálcio causou maior edema que a Pasta Guedes Pinto. Na análise microscópica aos 7 dias, ambos materiais evidenciaram a formação de tecido conjuntivo rico em fibroblastos e vasos sangüíneos, com alguns macrófagos e linfócitos. Aos 28 dias, a Pasta de hidróxido de cálcio apresentou, nas áreas próximas ao material, tecido conjuntivo com elevado número de macrófagos e linfócitos, enquanto que nas áreas mais distantes havia trabéculas ósseas neoformadas. Para a Pasta Guedes Pinto verificou-se presença de trabéculas ósseas neoformadas junto à superfície do material, e número maior destas em áreas mais distantes. Pode-se concluir que a Pasta Guedes Pinto causou menor edema, e proporcionou menor interferência no processo de reparo.
In order to evaluate the biological response of two filling materials of deciduous teeth, Calcium Hydroxide and Guedes Pinto pastes, were used the Edemogenic Test and the implantation in rat socket. For the Edemogenic test, 20 male rats were anesthetized and received a intravenous injection of Evans Blue 1%. After 30 minutes, the animals received 0,2 ml of one of the pastes in the subcutaneous region. In the periods of 3 and 6 hours, the rats were killed and the reactions were evaluated by spectrophotometric determination of the spread of the stain. For the morphological analysis, made after 7 and 28 days, 48 rats had their upper right central incisor removed and, in the socket, placed tubes containing one of the pastes. Calcium Hydroxide paste caused more edema than Guedes Pinto paste. In the 7-day microscopical analysis, both materials showed connective tissue with lots of fibroblasts and vases, and some macrophages and lymphocytes. At 28 days, Calcium Hydroxide paste showed, in the areas nearest to the implantation, connective tissue with high level of macrophages and lymphocytes. In the distant areas, it showed neoformed osteal trabeculas. For Guedes Pinto paste, it was verified the presence of neoformed osteal trabeculas in the nearest areas, and a large number of them in the distant areas. We conclude that Guedes Pinto paste caused less edema and provide less interference in the repair process.
Rasquin, Luis Cardoso. "Avaliação histopatológica do reparo apical e periapical em dentes de cães com vitalidade pulpar, após tratamento de canais radiculares utilizando dois cimentos obturadores à base de resina epóxica. Análise do pH e concentração de cálcio total /." Araraquara : [s.n.], 2001. http://hdl.handle.net/11449/101661.
Full textAbstract: The scope of the present study was to evaluate comparativily, two root canal resin - based sealers - AH Plus and Sealer Plus through two different methodologies. 1. In vivo study - Histopathological evaluation in teeth of dogs. 36 root canals of lower and upper bicuspide teeth of 2 dogs with vital pulp, which after biomechanic preparation utilizing sodium hypochloride solution at 1% (Milton solution) were filling by classical technique complemented by active lateral condensation, using Sealer Plus (Group I) and AH Plus (Group II). 90 days after treatment, the animals were sacrificed by overdose anesthetical. After histopathological processing of routine, the sections were stained with hematoxiline and eosine, Mallory Trichromic and Brown and Brenn. The histopathological analysis had evidenced that the AH Plus sealer shows more biological compatibility in relation to the Sealer Plus being the sealer that shows more good deposition of mineralized tissue to the apical level, offering an almost full apical sealing in the majority of the cases, with infiltrated inflammatory absent and when present was mild in the interstitial tissue and/or together to the material sealer, as well as in the periapical region. With the Sealer Plus, partial apical sealing occurred, however always followed by infiltrated inflammatory of mild degree in the intersticial tissue, however, more concentrated, together to the filling material when in the periapical region, the inflammatory infiltrated was presented, classified as of moderate degree. 2. In vitro study - With the objective to analyze pH and clearing of total calcium by periods that had varied from 0 to the 5 days, the filling materials. AH Plus and Sealer Plus had been manipulated according to the manufacturers instructions. Samples of each sealer were... (Complete abstract, click electronic address below).
Orientador: Mario Roberto Leonardo
Coorientador: Léa Assed B. da Silva
Banca: Idomeo Bonetti Filho
Banca: Francisco José de Souza Filho
Banca: Jesus Djalma Pécora
Doutor
Massi, Santiago. "Análise física química e mecânica de um cimento experimental à base de MTA /." Araraquara : [s.n.], 2010. http://hdl.handle.net/11449/95394.
Full textBanca: José Milton Carlos Kuga
Banca: Marco Antonio Hungaro Duarte
Resumo: Modificações têm sido propostas ao MTA e cimento Portland para a obtenção de um cimento obturador de canal radicular. Um material experimental à base de MTA (CE-MTA) é avaliado neste estudo para emprego como cimento endodôntico, contendo cimento Portland, radiopacificador, aditivos e veículo. Assim, o objetivo deste estudo foi avaliar o cimento experimental, usando como parâmetros comparativos o cimento AHPlus (AHP), MTA-Angelus (MTA) e cimento Portland (CP). Foram realizados testes de tempo de presa; resistência à compressão; escoamento; radiopacidade; alteração do pH e liberação de íons cálcio. Todas as metodologias foram definidas usando como referência normas ISO e a literatura científica recente da área endodôntica. O teste de escoamento seguiu a metodologia proposta pela norma ISO, com a medição do diâmetro dos discos de cimento, assim como da área por meio de um programa de imagens. O tempo de presa foi avaliado pela norma da ADA/ASTM, verificando os períodos de tempo necessários para que as agulhas indentadoras (100g e 2mm de diâmetro na ponta; e 456g e 1 mm de diâmetro na ponta) não marcassem a superfície dos discos de cimento, fornecendo resultados para a presa inicial e final. No teste de radiopacidade foi feita uma comparação da radiopacidade de discos de cimento de 10mm de diâmetro e 1 mm de espessura, com uma escala de alumínio padronizada. A alteração de pH do foi avaliada com um pHmetro e a liberação de cálcio com um espectrofotômetro de absorção atômica. Para ambos os ensaios tubos preenchidos com o cimento foram imersos em frascos contendo água destilada. Os tubos foram passados para um novo frasco contendo mais água destilada nos períodos de tempo de 3, 6, 12, 24 e 48 horas, assim como 7, 14 e 28 dias. O líquido remanescente nos frascos foi avaliado para obter os resultados deste ensaio. Na resistência à compressão... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Modifications of MTA and Portland cement has been proposed to obtain an root canal sealer. This study evaluates an experimental MTA based root canal sealer (CE-MTA) which contains Portland cement, radiopacifier, addictives and a vehicle. The aim of this study was to evaluate the experimental endodontic sealer, using white Portland cement (CP), MTAAngelus(MTA) and AH Plus (AHP) as control groups. The tests realized were: setting time, radipacity, compressive strength, pH alterations, calcium release and flow. The flow test followed the ISO 6876 norms, and the the sealer discs' area was measured with a paquimeter and using an area measurement software. The setting time was measured based on the ADA/ASTM Norm, allowing initial and final setting time measurements. Radiopacity was measured using an aluminum scale as reference and sealer discs with 10 mm in diameter by 1 mm thick. The pH was measured using a pHmeter and the calcium release using an atomic absorption spectrophotometer. For compressive strength test the ISO 9917 methodology was used, testing specimens at 24 hours and 21 days. All the data was submitted to statistical analysis, a normality test, and after the data normality check, an ANOVA and a Tukey test using 5% significance were applyed. Results: The results showed that CE-MTA has flow similar to AH Plus and superior to the minimum required by the ISO standard. The setting time was faster than AH Plus and slower than MTA and Portland cement. The compressive strength was lower for the experimental sealer at 24 hours time compared with all the tested materials, and similar for the experimental sealer and MTA at 21 days. The experimental sealer had a superior calcium release in all period of time, and higher pH values until 48 hours period, being similar to MTA and Portland cement on posterior time periods. The experimental sealer radiopacity was lower... (Complete abstract click electronic access below)
Mestre
Taylor, Nicholas Allen. "In-vitro evaluation of dye leakage of an MTA apical barrier after irrigation with 3% soldium hypochlorite, 2% chlorhexidine, MTAD, or 17% EDTA/3% sodium hypochlorite." Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5240.
Full textTitle from document title page. Document formatted into pages; contains vii, 40 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 30-34).
Richey, Mark Daniel. "In-vitro evaluation of dye leakage of an MTA apical barrier at varying setting times." Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5790.
Full textTitle from document title page. Document formatted into pages; contains vii, 45 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 32-37).
Ueda, Julio Katuhide [UNESP]. "Estudo in vitro da resistência à fratura de raízes debilitadas. Efeito de diferentes tratamentos restauradores." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/101362.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A preservação e a restauração de dentes despolpados severamente debilitados é um procedimento complexo e relativamente imprevisível. Este estudo avaliou a resistência à fratura de raízes bovinas experimentalmente debilitadas, reconstruídas internamente com diferentes materiais restauradores em combinação com pinos pré-fabricados de fibra de vidro comparados com raízes íntegras restauradas com núcleo metálico fundido ou pino de fibra de vidro. Foram selecionadas raízes de 120 (n=15) incisivos bovinos inferiores de dimensões semelhantes, dos quais, 90 foram internamente preparados para simular uma raiz debilitada. Todas as raízes foram preenchidas com diferentes materiais restauradores e os espécimes foram submetidos ao teste de resistência ao fracasso/ fratura com a aplicação de uma carga compressiva tangencial a um ângulo de 135º em relação ao longo eixo axial das raízes. Resultados indicaram diferenças estatisticamente significante entre os grupos. As raízes debilitadas restauradas com núcleo metálico fundido (grupo NMF-RD) demonstraram os mais baixos valores de resistência à fratura (107.7436 N), sendo estatisticamente diferentes dos demais grupos. As raízes íntegras restauradas com núcleo metálico fundido (NMF-RI) mostraram os maiores valores de resistência (362.3308 N), mas com diferenças estatisticamente significantes somente quando comparadas às raízes debilitadas restauradas com cimento resinoso dual (Variolink II, Ivoclar Vivadent - grupo Vario-RD), cimento resinoso autopolimerizável (Multilink, Ivoclar Vivadent - grupo Multi-RD) e cimento de ionômero de vidro modificado por resina (Vitremer, 3M ESPE - grupo Vitre-RD) associado com pino de fibra de vidro...
The preservation and restoration of severely weakened pulpless teeth is a difficult and relatively unpredictable procedure. This study evaluated the resistance to fracture of experimentally weakened bovine roots internally reconstructed with different filling materials in combination with prefabricated fiberglass posts compared with restored roots that were relatively intact. The roots of 120 mandibular bovine incisors with similar bulks were selected. Of these, 90 were internally prepared to standardized dimensions, thereby simulating weakness. All roots were filled with different restorative materials. The specimens were submitted to the fracture resistance testing with the application of a tangential compressive loading at an angle of 135º in relation to the long axes of the roots. Results indicated statistically significant differences among the groups. The weakened roots restored with the cast post-core (group NMF-RD) demonstrated the lowest fracture resistance values (107.7436 N), which were significantly different from the averages of the remaining groups. The healthy roots restored with the cast post-core (group NMF-RI) showed the highest values (362.3308 N), but statistically significant differences were observed only when compared with weakened roots restored by the dual-cured resin cements (Variolink II, Ivoclar Vivadent - group Vario-RD), chemically cured resin cements (Multilink, Ivoclar Vivadent - group Multi-RD) and resin-modified glass-ionomer cement (Vitremer, 3M ESPE - group Vitre-RD) associated with fiberglass posts. There was not statistically significant differences among the groups of the weakened roots restored with self-adhesive universal resin cement (RelyX Unicem, 3M ESPE - group Unicem-RD), composite resin (Tetric 15 Ceram, Ivoclar Vivadent - group Tetric-RD), group Vitre-RD and group Vario-RD... (Complete abstract click electronic access below)
Vitti, Rafael Pino 1984. "Study of commercial and experimental MTA-based sealers for root canal filling = Estudo de cimentos comerciais e experimentais à base de MTA para obturação de canais radiculares." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288133.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: Os objetivos neste trabalho foram (1) avaliar e comparar propriedades físico-químicas de cimentos endodônticos, sendo um recentemente desenvolvido à base de mineral trióxido agregado (MTA Fillapex, Angelus, Londrina, Brasil) e outro à base de resina epóxica (AH Plus, Dentsply, Konstanz, Alemanha); e (2) desenvolver e avaliar propriedades físico-químicas de três cimentos endodônticos experimentais à base de MTA e uma resina de salicilato com diferentes fosfatos de cálcio (CaP). Os materiais foram manipulados de acordo com as instruções dos fabricantes. Os cimentos experimentais foram compostos de pastas bases e catalisadoras misturadas em 1:1. A pasta base foi composta de 60% de óxido de bismuto e 40% de butilenoglicol dissalicilato. Três diferentes pastas catalisadoras foram formuladas contendo: (1) 60% de MTA, 39% de Resimpol 8 e 1% de dióxido de titânio; (2) 40% de MTA, 39% de Resimpol 8, 20% de hidroxiapatita e 1% de dióxido de titânio e; (3) 40% de MTA, 39% de Resimpol 8, 20% de fosfato dibásico de cálcio diidratado e 1% de dióxido de titânio. MTA Fillapex foi usado como controle. O tempo de trabalho e escoamento foi testado de acordo com a ISO 6876:2001 e o tempo de presa de acordo com a ASTM C266 (n=3 para cada material e teste). Os materiais foram colocados em moldes de PVC (8 mm x 1,6 mm) e armazenados em recipientes contendo 20 ml (testes de solubilidade e absorção de água) ou 10 ml (ensaios de pH e liberação de cálcio) de água deionizada a 37ºC (n=10 para cada material e teste). Em 1, 7, 14 e 28 dias as amostras foram removidas dos recipientes e secas para aferiação da solubilidade e absorção de água. Após 3 e 24 horas e 4, 7, 14 e 28 dias, a água dos recipientes foi coletada para análises do pH e liberação de cálcio. Os dados foram analizados usando ANOVA um fator e teste de Tukey (5%). MTA Fillapex mostrou menores valores de escoamento e tempos de trabalho e presa em relação ao AH Plus (p<0,05). MTA Fillapex obteve os maiores valores de escoamento e tempos de trabalho e presa em comparação aos materiais experimentais (p<0,05). MTA Fillapex apresentou os menores valores de solubilidade e absorção de água (p<0,05). Todos os cimentos experimentais e o MTA Fillapex apresentaram pH básico e liberação de íons cálcio. MTA Fillapex e AH Plus mostraram valores de acordo com a ISO 6876:2001. Os materiais experimentais apresentaram propriedades físico-químicas satisfatórias
Abstract: The aims of this study were (1) to evaluate and to compare physicochemical properties of endodontic sealers, a recent calcium-silicate based sealer (MTA Fillapex, Angelus, Londrina, Brazil) and other an epoxy resin based sealer (AH Plus, Dentsply, Konstanz, Germany); and (2) to develop and to evaluate physicochemical properties of three experimental root canal sealers made by mineral trioxide aggregate (MTA) and a salicylate resin with different calcium phosphates (CaP). The materials were handled following the manufacturer's instructions. The experimental materials were composed of a base and a catalyst pastes mixed in a 1:1. The base paste was made by 60% bismuth oxide and 40% butyl ethylene glycol disalicylate. Three different catalyst pastes were formulated with: (1) 60% MTA, 39% Resimpol 8 and 1% titanium dioxide; (2) 40% MTA, 39% Resimpol 8, 20% hydroxyapatite and 1% titanium dioxide and; (3) 40% MTA, 39% Resimpol 8, 20% dibasic calcium phosphate dihydrate and 1% titanium dioxide. MTA Fillapex was used as control. The working time and flow were tested according to ISO 6876:2001 and the setting time according to ASTM C266 (n=3 for each material and test). The materials were placed into PVC molds (8 mm x 1.6 mm) and stored in containers with 20 mL (solubility and water absorption tests) or 10 mL (calcium release and hydroxyl ions tests) of deionized water at 37°C (n=10 for each material and test). At 1, 7, 14 and 28 days the samples were removed from the solutions and dry for solubility and water absorption tests. After 3 and 24 h and 4, 7, 14, 28 days the soaking water was collected for Ca and pH analysis. The data were analyzed using one-way ANOVA with Tukey's test (5%). MTA Fillapex showed lower values of flow and working and setting times when compared to AH Plus (p<.05). MTA Fillapex had the higher values of flow and working and setting times when compared to experimental materials (p<.05). MTA Fillapex presented the lowest values of solubility and water absorption (p<.05). All experimental cements and MTA Fillapex showed basifying activity and released calcium ions. MTA Fillapex and AH Plus showed values in according to the ISO 6876:2001. The experimental materials showed satisfactory physicochemical properties
Doutorado
Materiais Dentarios
Doutor em Materiais Dentários
Garcia, Liliani Fernanda Marques. "Avaliação da resistência à fratura vertical de dentes tratados endodonticamente com diferentes materiais obturadores." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/23/23145/tde-24112009-114532/.
Full textThe aim of this study was to evaluate the in vitro vertical fracture resistance of endodontically treated teeth using different root filling materials: AH Plus (Dentsply/De Trey, Alemanha), Real Seal (Sybron Endo, EUA), GuttaFlow (Coltène/Whaledent, Suíça) , ActiV GP (Brasseler, EUA) and Thermafil (Dentsply- Tulsa Dental, EUA). Sixty four single-rooted human lower premolar were assigned into a Control Group (n=4), where the roots were not prepared or filled, and five experimental groups (n=12) according to the root filling materials: Group AH Plus; Group Real Seal; Group GuttaFlow; Group ActiV GP; Group Thermafil. The roots were prepared using Protaper Universal system (Dentsply-Maillefer, Suíça) and filled using one of the root filling materials. Then, the specimens were stored at 37º C at 100% humidity for 72 hours and included in acrylic resin. The periodontal ligament was simulated by the use of Impregum, which made a thin layer between the root and acrylic resin. The specimens were submitted to a vertical fracture resistance using a testing machine triaxiais (1,0mm/min). The values (Newton) and standard deviations obtained were: Control Group 394,25 ± 56,17N; Group ActiV GP 263 ± 89,32N; Group Thermafil 198,17 ± 61,65N; Group AH Plus 158,08 ± 31,56N; Group Real Seal 154,92 ± 42,64N and Group GuttaFlow 107,92 ± 20,72N. The data were submitted to ANOVA e Dunett tests (5%). Among the experimental groups, roots filled with ActiV GP showed the highest values of resistance of load vertical was applied, and were similar to Control Group and Thermafil. AH Plus, Real Seal and Thermafil groups showed statistical similar fracture resistance. GuttaFlow Group showed the lowest values of fracture resistance.
Kayafas, A. L. Christopher. "Obturation with gutta percha of greater taper." Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=486.
Full textTitle from document title page. Document formatted into pages; contains vii, 69 p. : ill. Vita. Includes abstract. Includes bibliographical references (p. 56-60).
Bier, Carlos Alexandre Souza [UNESP]. "Avaliação do pH, da liberação de íons cálcio e da adesividade de cimentos endodônticos contendo hidróxido de cálcio ou à base de MTA." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/104185.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O objetivo desse estudo foi a avaliação da liberação de íons cálcio, do pH e da adesividade de alguns cimentos utilizados em Endodontia: Sealapex (G1), Sealer 26 (G2), Acroseal (G3), Epiphany (G4), MTA Branco (G5), Endo CPM Sealer (G6). Após a espatulação, os materiais foram inseridos em tubos de polietileno medindo 1,5 mm de diâmetro interno e 1 cm de comprimento com ambas extremidades abertas e imersos em frascos de vidro contendo 10 mL de água ultra pura. Nos períodos de 2, 6, 12, 24 e 48 horas, 7, 14 e 28 dias foram realizadas as análises, sendo o tubo contendo o cimento transferidos para novo frasco a cada período. O pH e a liberação de íons cálcio foram avaliados, respectivamente por meio de pH metro e espectrofotometria de absorção atômica. Para a avaliação da adesividade dos cimentos endodônticos às paredes dentinárias, os canais radiculares de 28 dentes humanos uniradiculados foram dilatados com brocas de Gates Glidden número 1, 2 e 3 e brocas largo número 1, 3 e 5. As raízes foram cortadas em máquina de corte para confecção de discos de 2 mm de espessura. Durante o preparo e depois da secção os espécimes foram irrigados com solução de hipoclorito de sódio a 2,5% e com EDTA a 17 % para a remoção da smear layer. Após a divisão aleatória nos grupos experimentais, os espécimes foram secos e preenchidos com os cimentos endodônticos, sendo mantidos em estufa a 37oC e 95% de umidade relativa do ar por 48 hs. Em seguida, cada conjunto dentina/cimento endodôntico foi submetido ao teste push-out em uma máquina de ensaio mecânico e a tensão necessária para a remoção do cimento medida em Mega Pascal (MPa). Após a coleta dos dados estes foram submetidos à análise estatística de Análise Variância e teste Tukey, com nível de 5% de significância. Os maiores valores de pH foram obtidos pelos G6, seguido por G2 e G5 após 2 horas (P<0,05)...
The aim of this study was to evaluate in vitro the pH, calcium ion release and adhesiveness provide by 6 endodontic filling materials: Sealapex (G1), Sealer 26 (G2), Acroseal (G3), Epiphany (G4), White MTA (G5), Endo CPM Sealer (G6). After manipulation, the sealers (n=10) were placed in tubes with 10 mm-long and 1.5 mm in diameter and immediately immersed in a glass flask containing 10 ml of ultra pure water, which was hermetically sealed and stored at 37°C. At 2, 6, 12, 24 and 48 hr, and at 7, 14 and 28 days after mixing the tubes were moved to new flask with fresh solution and the water in which they were immersed was analyzed for pH with a pH meter and for released calcium by atomic absorption spectrophotometry. To evaluate the adhesiveness of the sealers to the root canal wall, 28 teeth were enlarged to size 5 Largo drill and cut in a cutting machine to create 2 mm thickness slices. During all this procedure the root canal was irrigated with sodium hypochlorite 2.5% and with EDTA 17% to remove the smear layer. The slices were randomly allocated to one of the groups, dried and filled with the sealers and kept in a controlled environment (37oC and 95% humidity) to allow the setting of the sealers. After that, the slice root/endodontic sealer was submitted to push out test in a mechanical testing machine and the results were expressed in Mega Pascal (MPa). The results obtained at each time were statistically evaluated. After 2 hours the uppermost pH was found in the G6, followed by G2 and G5 (P<0,05). From 6 h till 24 h the highest value were observed in groups G5, G6 and G2. After 48 hours, the pH of groups G5 and G6 were stood out. Finally from the 7th to 28th days of evaluation G2, G5 and G6 presented the utmost pH. With regards to calcium ions release in beginning periods the G6 was statistical significantly from the other groups until the 7th day (P<0.05)... (Complete abstract click electronic access below)
Novais, Veridiana Resende. "Análise mecânica de retentores intra-radiculares." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290499.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: Este estudo avaliou os aspectos mecânicos de retentores intra-radiculares pré-fabricados reforçados com fibra, de forma progressiva por meio de etapas distintas e seqüenciais, divididas em três experimentos. No Capítulo 1, foram avaliados parâmetros como: efeito da conicidade do pino, distância entre os suportes, e propriedades dos pinos na flexão e tensão máxima pelo método de elementos finitos na realização de ensaios de flexão de 3 pontos. Foi gerado modelo tri-dimensional de pino de fibra de vidro (RelyX post, 3M-Espe), variando posições dos suportes inferiores e inclinação do pino. Empregou-se propriedades elásticas, características ortotrópicas e isotrópicas. A inclinação dos pinos cônicos para nivelá-los nos suportes teve pouco efeito nas tensões. A flexão aumentou quando 50% da porção carregada do pino envolveu conicidade. Quando o posicionamento do pino envolveu 20% da porção cônica, os valores de flexão foram similares ao modelo de referência, que é o pino cilíndrico, sem inclinação. Propriedades ortotrópicas resultaram em aumento da flexão comparado ao pino isotrópico. No Capítulo 2, propriedades mecânicas de diferentes sistemas de pinos pré-fabricados foram avaliadas por ensaio experimental de flexão de três pontos, assim como análise da correlação entre propriedades mecânicas e características estruturais visualizadas por microscopia eletrônica de varredura associado à software de processamento de imagens. Os resultados demonstraram que as características estruturais afetaram significativamente as propriedades mecânicas dos pinos. Resistência à flexão está diretamente correlacionada com a razão fibra/matriz de resina, enquanto módulo de flexão está inversamente relacionado ao número de fibras/mm2. No Capítulo 3, foi avaliada resistência de união de pino de fibra ao núcleo de preenchimento de resina composta por meio do teste de push-out, variando o tipo de agente silano: três silanos pré-hidrolizados e um sistema de silano de dois componentes; e a temperatura de secagem com ar após aplicação do silano: 23°C e 60°C. Empregou-se ainda grupo controle negativo, no qual nenhum tratamento do pino foi realizado. A aplicação de silano pré-hidrolizado e secagem com ar quente (60°C) dos pinos não influenciou a resistência de união. O agente silano de dois componentes com temperatura de secagem de 23°C apresentou os maiores valores de resistência de união. Desta forma, dentro das limitações dos três experimentos, conclui-se que teste de flexão de três pontos empregado para avaliação de pinos pré-fabricados é válido quando limita a área de ensaio à porção cilíndrica dos pinos; as características estruturais dos pinos têm correlação com as propriedades mecânicas dos mesmos; e a aplicação de ar quente sobre as superfícies de pinos silanizados não tem efeito significativo na resistência de união entre pinos de fibra e preenchimento com resina composta
Abstract: The fiber-reinforcement composite (FRC) posts introduced the new concept of restorative system, in which the various components of the reconstruction: post, cement, filling material and dentin have now become a complex mechanically homogeneous. The knowledge of the structure, composition and physical properties of these fiber posts systems is important in order to minimize the failures and the unsuccessfully clinical. Thus, the present study was conducted to analyze sequentially the biomechanical parameters of FRC posts through different stages divided into three experiments. In Chapter 1, the effect of taper, specimen supports and the properties on flexure and stress response during three-point bending were analyzed using finite element analysis. Three-dimensional non-linear finite element model of a fiber-reinforced composite post was created. Different support positions were evaluated during a simulated three-point bending test. The applied properties were elastic and orthotropic. Tilting the tapered posts to level those in the test setup had little effect on the outcome. Flexure increased when 50% of the bent portion involved taper. If 20% of the bent post involved taper, the flexure values were close to control group. The orthotropic properties also resulted in increased flexure compared to an isotropic post. Maximum stresses were only a little higher when 50% of the bend structure involved taper, while the orthotropic properties had little effect. In Chapter 2, the mechanical properties of different FRC posts were assessed with three-point bending test and evaluated the correlation between mechanical properties and structural characteristics by scanning electron microscopy (SEM) associated with an software of image processing. Then, the structural characteristics significantly affect the mechanical properties of fiber posts. The flexural strength is directly correlated with fiber/matrix ratio, whereas the flexural modulus is inversely correlated with number of fibers per mm2 of post. In the Chapter 3, was evaluate the effect of three prehydrolyzed silanes and one two-bottle coupling agent and two air-drying temperature (23°C and 60°C) on the bond strength between glass fiber posts and composite resin core using micropush-out testing. Additionally, it was tested a control group, which no treatment of fiber post were realized. The results showed that drying with warm air and post silanization with pre-hydrolized silanes had no significant effect on push-out bond strength between glass fiber post and composite resin core. For 23°C air-drying groups, the bond strength with two-bottle coupling agent was higher than the other groups. Then, based on the findings of this study, and within the limitation of this investigation, could be concluded that the regardless of leveling, the flexural stress determination with tapered fiber-reinforced posts in the three-point bending test was valid as long as the tapered portion was limited. Additionally, the mechanical properties have correlation with structural characteristics of FRC posts. Finally, the warm air-drying in silanizated post surface had not significant effect on bond strength between fiber post and composite resin core
Doutorado
Materiais Dentarios
Doutor em Materiais Dentários
SOUZA, Rafaella Maria Silva de. "Influência Dos Materiais Endodônticos na Produção de Artefatos de Imagem em Tomografia Computadorizada de Feixe Cônico." Universidade Federal de Pernambuco, 2015. https://repositorio.ufpe.br/handle/123456789/17148.
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CAPEs
Objetivo deste estudo foi verificar a influência dos materiais endodônticos, tecidos radiculares e posição dos dentes na produção de artefatos em Tomografia Computadorizada de Feixe Cônico (TCFC). Quarenta e oito pré-molares humanos inferiores foram distribuídos em dois grupos controles: dentes sem instrumentação e dentes instrumentados e quatro grupos experimentais, nos quais, após a instrumentação adicionou-se: guta-percha, guta-percha+Sealer 26, guta-percha+AH Plus e guta-percha+FillCanal. Os dentes foram montados em uma mandíbula para a exposição com o i-Cat em resoluções de 0.125 e 0.2mm de voxel. Três radiologistas avaliaram as imagens no formato pdf. A concordância para a presença e intensidade de artefatos intra e inter-avaliador variou de 0.79-0.96 e 0.54-0.95 (Kappa), respectivamente. Diferentes posições nos alvéolos não interferiram na produção de artefatos (p=1.000; teste Exato de Fisher). A maior parte das imagens foi classificada como excelente e boa (grupos controles) e boa e regular (grupos experimentais). Em todas as avaliações dos grupos experimentais foram observados artefatos. Em relação à intensidade dos artefatos, houve diferença significativa apenas no terço radicular cervical do AH Plus com resolução 0.125mm (p≤0.05; teste Exato de Fisher). Imagens com resolução de 0.2 mm, sugeriram presença de fratura no grupo Guta-percha e Guta-percha+Ah Plus. Todos os materiais de preenchimento produziram artefatos, reduzindo a qualidade da imagem para o auxílio no diagnóstico. Os tecidos radiculares e a posição do dente não interferiram na formação de artefatos. Dependendo da finalidade diagnóstica, é indicada a exposição com resolução de 0.125mm, por apresentar dose de radiação equivalente à de 0.2mm e imagens com melhor qualidade.
The aim of this study was to investigate the influence of endodontic filling materials, root tissues and position of the teeth in the production of Artifacts in Cone-Beam Computed Tomography (CBCT). Forty-eight human lower premolars were divided into two control groups (C1 teeth without instrumentation, C2 instrumented teeth) and four experimental groups, in which, after instrumentation ,gutta-percha, gutta-percha + Sealer 26, gutta-percha + AH Plus and gutta-percha + FillCanal were added. The teeth were mounted on a jaw for exposure with i-Cat in resolutions 0.125 and 0.2 mm voxel. Three radiologists evaluated the images in pdf format. The agreement for the presence and intensity of intra and inter-rater artifacts ranged from 0.79-0.96 and 0.54-0.95 (Kappa), respectively. Different positions in the alveoli did not affect the production of artifacts (p = 1.000; Fisher's exact test). The images (99%) were classified as excellent or good (control groups) and good and regular (experimental groups). Image artifacts were observed in all evaluations of the experimental groups. Regarding the intensity of the artifacts, there was a significant difference only in the cervical root third of AH Plus with Resolution 0.125mm (p≤0.05; Fisher's exact test). Images with 0.2 mm resolution, suggested fracture presence in Guta-percha group and Gutta-percha + Ah Plus. All filling materials produced artifacts, reducing image quality to aid in diagnosing. The root tissue and position of the tooth did not interfere in the formation of artifacts. Depending on the diagnostic purposes, it is indicated exposure with resolution of 0.125mm, to present radiation dose equivalent to 0.2mm and images with better quality.
Lima, Regina Karla de Pontes [UNESP]. "Sistema adesivo na obturação de canais radiculares: biocompatibilidade e infiltração coronária (reparação apical e periapical em dentes de cães)." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/90393.
Full textConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
O objetivo deste estudo foi o de avaliar, in vivo, a biocompatibilidade e a influência da infiltração, no sentido coroa/ápice, na reparação dos tecidos apicais e periapicais pós-tratamento endodôntico, utilizando dois diferentes materiais obturadores: o cimento Sealapex e um sistema resinoso de obturação de canal radicular denominado de sistema Epiphany/Resilon. Os resultados mostraram que o sistema Epiphany/Resilon apresentou resposta tecidual apical e periapical melhor que o cimento Sealapex, independente da presença ou não de restauração coronária, em todos os aspectos estudados. O sistema Epiphany/Resilon com restauração coronária apresentou melhores resultados que o mesmo sistema sem restauração coronária. O cimento Sealapex sofreu influência da infiltração coronária, apresentando, em todas as variáveis estudadas, os piores resultados, quando exposto ao meio bucal.
The objective of this study was to evaluate, in vivo, the biocompatibility and the leakage influence, in the crown-apex direction, in the endodontic post-treatment repairing of apical and periapical tissues, using two different filling materials: Sealapex sealer and a resinous cement of root canal filling - Epiphany/Resilon. The results showed that Epiphany/Resilon system presented apical and periapical tissue response better than Sealapex independent of presence or no of the coronary restoration, in all studied aspects. Epiphany/Resilon system, with coronary restoration presented better results than of the same system without coronary restoration. Sealapex was influenced by the coronary exposition to oral environment, presenting the worst results in all studied variables.
Penina, Patricia de Oliveira. "Análise microscópica de capeamento pulpar direto com diferentes materiais em dentes humanos." Universidade do Estado do Rio de Janeiro, 2007. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=562.
Full textThe direct dental pulp capping aims to preserve the pulp vitality. This work shows the tissue response from human pulps to that procedure with the Mineral Trioxide Agregate (MTA) compared to calcium hydroxide - Ca(OH)2. Twenty premolars from 10 patients with extraction indicated to orthodontic treatment were used. All teeth showed pulp vitality and were treated with direct dental pulp capping with MTA or with calcium hydroxide. The teeth have been extracted within 14 or 45 days, stablishing the following experimental groups: Ca(OH)2 14 days; Ca(OH)2 45 days; MTA 14 days; and MTA 45 days. These teeth were analyzed under microscopy by two observers trained. The data obtained were put in table using the Kappa test to note the agreement degree between the observers. For the comparative assessment between the citotoxic response from material tested has been applied the non-paired Kruskal-Wallis test, and the Dunns test for individual comparisons and identifying the significance of findings. In the analysis of results there had no statistically significant difference between the groups in experimental periods of 14 days and 45 days, not even in the pulp inflammatory response to calcium hydroxide when compared to MTA. The thickness and arrangement of the healing dentin barrier faced with calcium hydroxide, when compared to MTA, also showed no statistically significant difference. It may be concluded that the MTA fulfils the requirements of pulp capping material in human teeth showing biological and physical properties that indicate it for this treatment.
Santos, Filho Paulo Cesar de Freitas. "Biodinamica restauradora de dentes tratados endodonticamente : analise por elementos finitos." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289704.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O objetivo deste estudo foi desenvolver protocolo de modelagem tridimensional para incisivo central superior com aplicabilidade ao método de elementos finitos e avaliar o comportamento biomecânico de incisivo superior tratado endodonticamente e restaurado com retentores e coroa cerâmica por meio de análise por elementos finitos comparado ao dente hígido. Para geração do modelo 3D foi selecionado incisivo central superior hígido. Esmalte e dentina foram degradados em diferentes fases com ácido clorídrico-10%, e mapeados com scanner de contato 3D (Modela, Roland). Para o mapeamento do volume pulpar, a dentina foi seccionada longitudinalmente no sentido mesio-distal e realizado o escaneamento do espaço negativo referente à polpa. Os arquivos *.STL foram exportados para programa Bio-CAD (Rhinoceros-3D). Volumes de cada estrutura dental e técnicas restauradoras foram gerados por meio da associação de superfícies NURBS. Os modelos foram exportados para o programa de elementos finitos (FEMAP-NeiNastran), onde foi realizado o processo de malhagem, inserção das propriedades mecânicas e condições de contorno. Foram gerados 17 modelos, sendo um do dente hígido e 16 modelos de acordo com os 4 fatores em estudo: tipo de retentor em dois níveis: pino de fibra de vidro (PFV) e núcleo moldado fundido (NMF), extensão do retentor em dois níveis: 7,0mm (7,0) e 12,0mm (12,0), remanescente coronário em dois níveis: remanescente de 2,0mm (RE) e ausência de remanescente (ARE), enfraquecimento do canal radicular em dois níveis: ausência de enfraquecimento (AENF) e presença de enfraquecimento (ENF). Foi simulada aplicação de pressão constante no valor de 100N perpendicularmente à superfície palatina do incisivo. Os resultados foram analisados pelo critério de von Mises e tensão máxima principal. Os resultados obtidos mostraram que o modelo geométrico 3D desenvolvido é adequado para a análise por elementos finitos. Concluiu-se que o PFV apresenta distribuição homogênea das tensões mais semelhante ao dente hígido, enquanto o NMF apresentou grande concentração de tensão no interior do canal radicular. O fator extensão do retentor intra-radicular influenciou isoladamente apenas a distribuição de tensões do NMF. A presença de remanescente coronário sempre melhorou a distribuição de tensões. O enfraquecimento do canal radicular teve maior impacto na distribuição de tensões.
Abstract: The aim of this study was develop 3D model generation protocol for upper anterior teeth for finite element analysis and evaluate biomechanical behavior of endodontically treated incisor with finite element analysis compared to sound teeth. It was selected intact upper central incisor. Enamel and dentin were treated in different steps with cloridric acid 2% and scanned with 3D-contact scanner. The stereolithographics archives were exported to Bio CAD program. The volums of each dental structure and restorative techniques were generated by association of NURBS surfaces. The models were exported for finite element software, where were realized the meshed process, mechanical properties insertion and bondary conditions. It were generated 17 models, one was a sound incisor model and 16 models according to 4 studied factors: post type: glass fiber post (GFP) and cast post and core (CPC), post length: 7,0mm (7,0) e 12,0mm (12,0), ferrule: 2,0mm ferrule (FE) and absence of ferrule (AFE), weakness of root canal: absence of weakness (AWR) and weakened root (WR). It was simulated 100N loading application on the palatal surface with 135° angulation. The results were analised by Von Mises criteria and principal maximum tension. Obtained results showed that geometric model developed is appropriated for finite element analysis. It can be concluded that GFP showed homogeneous stress distribution like the sound incisor, while CPC showed stress concentration into root canal. The post length influenced only the CPC stress distribution. The ferrule always showed better stress distribution. The weakness of root showed the highest impact in stress distribution.
Doutorado
Dentística
Doutor em Clínica Odontológica
Galoza, Marina Oliveira Gonçalves. "Efeitos de diferentes protocolos de limpeza de resíduos do cimento endodôntico e a repercussão sobre a interface de adesão na dentina bovina /." Araraquara, 2017. http://hdl.handle.net/11449/152745.
Full textResumo: O objetivo deste estudo foi avaliar a eficiência do etanol a 95 % (Rinse-N-Dry [RD]) ou da solução de formamida (Endosolv R [ER]), associados com a microabrasão com micropartículas de vidro (Concepsis Scrub [Cs]), na limpeza da dentina impregnada com o cimento à base de resina epóxi (AH Plus) e seus efeitos sobre a interface adesiva. Quarenta espécimes de dentina foram impregnadas com o cimento endodôntico (AH Plus). Em seguida foram limpos com os seguintes protocolos (n = 10): G1(E), somente RD; G2(ER), somente ER; G3(E + Cs), RD e Cs; G4(ER + Cs), ER e Cs. No G5 (controle) nenhum tratamento foi realizado. Os espécimes foram analisados em SEM, para avaliar a presença de resíduos (500x) e contagem de túbulos de dentinários abertos (1000x). Outros 50 espécimes foram preparados esubmetidos a similares procedimentos e protocolos de limpeza. Após 7 dias, tubos contendo resina composta foram fixados na dentina com um sistema adesivo "condiciona-e-lava" (Scotchbond Multi-porpose; 3M ESPE; 3M; St. Paul; MN, USA) e submetidos ao teste de microcisalhamento. G2 e G4 demonstraram maior persistência de resíduos e menor incidência de túbulos dentinários abertos que G1 e G3(P<0.05) e não houve diferença entre G1 e G3 ou G2 e G4 (P>0.05). A resistência de união do sistema adesivo foi similar entre todos os grupos (P>0.05). A microabrasão imediata interferiu negativamente na ação dos protocolos de limpeza, porém todos mantiveram resíduos sobre a superfície dentinária. Entretanto, após 7 dias... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The aim of this study was to evaluate the cleaning protocol of dentin impregnated with epoxy resin-based sealer (AH Plus) and the effects on the adhesive interface using 95% ethanol (Rinse-N-Dry [RD]) or formamide solution (Endosolv R [ER]) associated with microabrasion with glass microparticles (Concepsis Scrub [Cs]) . Forty dentin specimens were impregnated with endodontic sealer (AH Plus). Specimens were cleansed according to the following protocols (n = 10): G1 (E), only RD; G2 (ER), only ER; G3 (E + Cs), RD and Cs; G4 (ER + Cs), ER and Cs. No treatment was performed in G5 (control). The specimens were subjected to SEM in order to evaluate the residues persistence (500x) and open dentinal tubules counting (2000x). Another 50 specimens were prepared, subjected to similar procedures and cleaning protocols.7 days later, composite-resin-made specimens were performed on dentin using etch-and-rinse adhesive system, then submitted to micro-shear test. G2 and G4 showed higher residues persistence and lower incidence of open dentinal tubules than G1 and G3 (P <0.05). No difference was found between G1 and G3 or G2 and G4 (P> 0.05). Adhesive system bond strength was similar in all groups (P> 0.05). Microabrasion negatively affected the cleaning protocols action, all groups presented residues on the dentin surface. However, 7 days later the protocols did not affect the bond strength of etch-and-rinse adhesive system to dentin previously impregnated with epoxy resin-based sealer.
Doutor
Silva, Paulo Tadeu da [UNESP]. "Avaliação da citotoxicidade de cimentos endodônticos em relação aos reativos intermediários do oxigênio e nitrogênio em culturas de macrófagos peritoneais de camundongos." Universidade Estadual Paulista (UNESP), 2004. http://hdl.handle.net/11449/101640.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Analisou-se a citotoxicidade dos seguintes cimentos: Endofill, Sealapex e Polifil, quanto à liberação de óxido nítrico (NO) e peróxido de hidrogênio (H2O2) em culturas de macrófagos peritoneais de camundongos e também utilizamos um método de análise colorimétrica usando M.T.T. Concluiu-se que as considerações presentes após os resultados, discussão e constatação os cimentos que apresentaram o menor nível de citotoxicidade foi o Endofill, seguido da equivalência de liberação de Polifil e Sealapex, embora todos foram menos citotóxicos que o Grupo Controle Zimosan-A para H2O2 e o LPS para o NO.
It was analyzed the citotoxicity of the following cements Endofill, Sealapex, and Poliol regarding the nitric oxide (NO) release and the hydrogen peroxide (H2O2) in the peritoneais macrophages medium of mice in different concentrations and we have also analyzed a colorimetric method using the M.T.T. It was concluded from the considerations which were present in the results, discussion, and verification that the cement which presented the lowest citotoxicity level was the Sealapex followed by the Polifil and the Endofill, although all of them were less citotoxic than the Zimosan-A control group for H2O2 and the LPS for the NO.
Joaquim, Natália Martins 1989. "Análise da citotoxicidade de materiais obturadores de dentes decíduos." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288856.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: Endodontia em dentes decíduos é um procedimento de suma importância para manter a integridade e saúde dos dentes e tecidos de suporte. Sendo assim, o uso de materiais obturadores de canais radiculares que apresente o máximo de propriedades desejáveis é indispensável. O objetivo do presente estudo foi analisar a citotoxicidade de diferentes materiais obturadores em fibroblastos do ligamento periodontal humano (PDL) e em células osteoblásticas de osteossarcoma humano (Saos-2). Os fibroblastos foram cultivados em meio de cultura (meio Eagle modificado por Dulbeco - DMEM) suplementado com 1% soro fetal bovino (FBS) e antibióticos. Os osteoblastos foram cultivados em meio de cultura McCoy¿s suplementado com 15% FBS e antibióticos. Próximos de atingir a confluência, as células foram plaqueadas na concentração de 7x103 células por poço e foram expostas aos seguintes materiais, conforme os grupos: G1- Meio de cultura sem material obturador (controle negativo), G2- Dimetiilsulfóxido (DMSO) (controle positivo), G3- Calen®, G4- Calen® associada ao Óxido de Zinco, G5- Calen® associada ao Iodofórmio, G6- Óxido de zinco e eugenol (OZE), G7- Vitapex® e G8- UltraCal®XS. A manipulação dos materiais foi realizada em condições assépticas. A citotoxicidade dos materiais obturadores foi analisada em intervalos de tempos (8, 24 e 48 horas) pelo método de redução MTS e classificado como não citotóxico, citotoxicidade leve, moderada e grave. O grupo controle negativo foi composto apenas por células, sem o uso de material obturador. A análise morfológica das células foi realizada por meio da microscopia de fluorescência. Os dados obtidos foram submetidos à análise de variância dois fatores e ao teste Tukey para comparação entre os grupos, com nível de significância 5%. As imagens obtidas por meio da microscopia de fluorescência foram analisadas de forma descritiva. Os resultados mostraram que para os fibroblastos, Calen®(85,91±10,01), Calen® associada ao Óxido de Zinco (85,91±8,16) e Calen® associada ao Iodofórmio (83,96±13,95) diferiram do controle negativo (100±0) e positivo (19.72±5,70) após 8 horas de exposição. Para os osteoblastos, Calen® associada ao Óxido de Zinco (75,87±19,16), Calen® associada ao Iodofórmio (75,5±12,40) e o OZE (68,71±22,19) foram os únicos grupos que em 8 horas diferiram do controle negativo (100±0) e positivo (22,18±6,77). Pode-se concluir que todos os materiais avaliados, para fibroblastos do ligamento periodontal humano, não foram citotóxicos ao longo do tempo. No entanto, Calen® associada ao Iodofórmio apresentou toxicidade leve em 48 horas para os osteoblastos. Vitapex® foi o material que apresentou menor toxicidade celular nos osteoblastos em 8 e 48 horas, comparando-se os outros materiais avaliados. Calen® associado ao Óxido de zinco, Calen® associado ao Iodofórmio e OZE foram capazes de modificar a morfologia dos fibroblastos, mas para os osteoblastos não foram observadas alterações morfológicas
Abstract: Endodontics in primary teeth is an important procedure to maintain the integrity and health of the teeth and supporting tissues. Using a root canal filling material that shows desirable properties is indispensable. The aim of the present study was to evaluate the root filling materials cytotoxicity on periodontal ligament fibroblasts (PDL) and osteoblastic human osteosarcoma cells (Saos-2). Fibroblasts were cultured in culture medium (Dulbeco modified Eagle medium - DMEM) supplemented with 1% fetal bovine serum (FBS) and antibiotics. The osteoblasts were cultured in McCoy's culture medium supplemented with 15% FBS and antibiotics. Next to reach confluence, the cells were plated at a concentration of 7x103 cells per well and were exposed to materials, according to the groups: G1 - culture medium without filling material (negative control); G2- Dimethyl sulfoxide (DMSO) (positive control); G3 ¿ Calen®; G4 - Calen® associated with Zinc Oxide; G5 - Calen® associated with Iodoform; G6 ¿ Zinc Oxide and eugenol (ZOE); G7 - Vitapex®; G8 - UltraCal® XS. The materials were prepared under aseptic conditions. Cytotoxicity was evaluated by cell viability at time intervals (8, 24 and 48 h) by MTS assay and rated as non-cytotoxic, mild, moderate and severe cytotoxicity. The negative control group was composed only of cells without the use of filling material. Cells morphological were observed by fluorescence microscopy. Data were submitted to two-way analysis of variance with post-hoc comparisons base on Tukey's multiple comparisons, with the significance level fixed at 5%. The images obtained at fluorescence microscopy were evaluated using descriptive analysis. The results showed that for fibroblasts, Calen®(85.91±10.01), Calen® associated with Zinc Oxide (85.91±8.16) e Calen® associated with Iodoform (83.96±13.95) was differ from the negative control (100±0) and positive (19.72±5.70), at 8 h. For osteoblasts, Calen® associated with Zinc Oxide (75.87±19.16), Calen® associated with Iodoform (75.5±12.40) and ZOE (68.71±22.19) differed from negative control (100±0) and positive (22.18±6.77) in 8 h. It can be concluded that all materials were non- cytotoxic to human fibroblasts cells over time. However, Calen® + Iodoform showed higher cytotoxicity to osteoblasts at 48 h. Vitapex® was the material that showed the less cell cytotoxicity in osteoblasts at 8 and 48 h, compared to the other materials tested. Calen® associated with Zinc Oxide, Calen® associated with Iodoform and ZOE was able to modify the morphology of fibroblasts, but osteoblasts but no morphologic alterations were observed
Mestrado
Odontopediatria
Mestra em Odontologia
Teixeira, Joana Fernandes Rodrigues Nobre. "Revisão sobre os cimentos de obturação utilizados em Endodontia." Master's thesis, [s.n.], 2014. http://hdl.handle.net/10284/4458.
Full textO sucesso do tratamento endodôntico está dependente de uma limpeza e conformação e posterior obturação dos canais radiculares, com o objectivo de obter um selamento hermético ideal, a fim de evitar o fracasso endodôntico. Para isso, é necessário obter a conjugação de materiais sólidos e plásticos, de modo, a que a sua combinação seja o mais biocompatível com os tecidos biológicos. Um cimento ideal deve aderir firmemente tanto à dentina como à guta-percha. Nesse sentido, realizou-se uma pesquisa bibliográfica recorrendo às bases de dados da Pubmed, Science Direct, B-On, Elvesier, SciELO e Wiley com as seguintes palavras-chave: “endodontic sealers”, “obturation materials”, “root canal filling”, “MTA”, “obturation cements”, “epoxy resin”, “root canal cements”, “bioceramic material”, “resin sealers”, “calcium hidroxide AND endodontic sealers”, “aggregate trioxide mineral AND endodontic sealers”, “resilon AND endodontic sealers” e “zinc oxide eugenol AND endodontic sealers”. A pesquisa resultou num total de 69 artigos consultados. No presente trabalho pretende-se avaliar e comparar as propriedades físicas e químicas de alguns cimentos endodônticos e comparar a sua eficácia no selamento hermético dos canais radiculares. O cimento de óxido de zinco eugenol é um cimento utilizado já há muitos anos e foi durante muito tempo o cimento padrão em Endodontia, embora atualmente já esteja em desuso por terem aparecido cimentos com melhores propriedades. Cimentos endodônticos contendo hidróxido de cálcio foram lançados no mercado com o objetivo de aproveitar as propriedades biológicas do hidróxido de cálcio, nomeadamente a sua capacidade de estimular a calcificação. No entanto, este tipo de cimento é facilmente reabsorvível. Os cimentos de resina foram desenvolvidos para serem utilizados em vez de óxido de zinco eugenol, melhorando assim o selamento dos canais radiculares e conferindo-lhes mais força quando comparados com os materiais convencionais e são atualmente os cimentos mais utilizados em Endodontia. O agregado de trióxido mineral (MTA) surgiu como o material de escolha para reparação de perfurações da raiz e barreira apical nos anos 90, um período revolucionário marcado por muitos avanços na Endodontia. Atualmente, ele é utilizado não só em perfurações da raiz, mas também no Tratamento Endodôntico como cimento endodôntico, na obturação da porção apical de dentes imaturos, e em obturações retrógradas. O sistema Resilon consiste de Resilon com um primer e um cimento e tem ganhado popularidade por causa de sua capacidade de ligação à parede do canal radicular e criar um selamento radicular a longo prazo. É utilizado em conjunto com um novo cimento resinoso, Epiphany, com capacidade de ligação com a dentina. As biocerâmicas são materiais cerâmicos biocompatíveis, inertes para o corpo humano, que são usados numa variedade de procedimentos médicos. Estes materiais são óxidos cerâmicos ou metálicos com requisito de biocompatibilidade para qualquer função como tecidos humanos ou para reabsorver e estimular a regeneração dos tecidos naturais. As aplicações endodônticas incluem material cirúrgico de preenchimento do ápice radicular, material de reparação radicular, material de selamento do canal radicular e recobrimento pulpar. Dada a importância do tratamento endodôntico, é de enorme relevância que se continue a investir mais e mais, a fim de tentar reunir todas as características dum cimento ideal, visto que até a actualidade, não existe um cimento endodôntico ideal para o selamento dos canais radiculares. Conclui-se que os cimentos à base de resina são actualmente o materiais mais próximos de um cimento ideal, ainda que as biocerâmicas se estejam a mostrar bastante promissoras. The success of the endodontic treatment is dependent of a cleansing and arrangement and subsequent root canal filling with the goal to achieve an ideal hermetic sealing, in order to avoid an endodontic failure. Therefore, it is necessary to obtain a combination of solid and plastic materials so that it’s combination may be as biocompatible as possible with the biologic tissues. The ideal cement should adhere more firmly either to the dentine as to the guta-percha. In that sense, a bibliographic research has been made, using the data base of Pubmed, Science Direct, B-On, Elvesier, SciELO e Wiley with the following key words “endodontic sealers”, “obturation materials”, “root canal filling”, “MTA”, “obturation cements”, “epoxy resin”, “root canal cements”, “bioceramic material”, “resin sealers”, “calcium hidroxide AND endodontic sealers”, “aggregate trioxide mineral AND endodontic sealers”, “resilon AND endodontic sealers” e “zinc oxide eugenol AND endodontic sealers”. In the present document it is intended to evaluate and compare the physical and chemical properties of some endodontic cements and compare it’s effectiveness in the hermetic sealing of the root canals. The zinc oxide eugenol cement has been used for many years and was during a long period of time the standard cement used in Endodontics. Endodontic cements containing calcium hydroxide were launched in the market with the aim to take advantage of calcium hydroxide’s biologic properties, particularly it’s ability to stimulate calcification. The resin cements were developed to be used instead of zinc oxide eugenol, improving the root canal sealing and thus increasing the strength compared to the conventional products. Mineral trioxide’s aggregate has emerged in the 90’s as the product of choice for root perforation repair and apical barrier, a revolutionary period that was characterized by many advances Endodonitcs. Currently it’s used not only in root perforations, as well as in endodontic treatement as the main endodontic cement in apical portion closure of young teeth and backward enclosures. The Resilon system consists of Resilon with a primer and a cement that has been gaining popularity because of it’s capability of connection to the root canal wall and create a root sealing on a long term. It is used combined with Epiphany, a new resin cement, with capacity to connect to the dentine. The bioceramics are biocompatible products, inerts to the human body, that are used in a variety of medical procedures. These materials are ceramic or metallic oxides with biocompatibility required to any human tissue function or reabsorn and stimulate the regeneration of the natural tissues. The endodontic applications include cirurgic material filling, repair, sealing of the root apex and pulp restoration. Given the relevance of endodontic treatment, it is highly important the investment in order to gather all the characteristics of an ideal cement, since to this day, there is no ideal endodontic cement for the root canal sealing. Thus, it can be concluded that the resin based cements are currently the closest materials to the ideal cement, even though the bioceramics are showing to be promising.