Dissertations / Theses on the topic 'Infiltração bacteriana'
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Oliveira, Ana Carolina Mascarenhas [UNESP]. "Infiltração bacteriana em obturações realizadas com diferentes cimentos endodônticos." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/95393.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Este estudo teve como objetivo a avaliação da capacidade seladora bacteriana pela via coronária proporcionada por diferentes cimentos endodônticos: Endofill, AH Plus, Sealer 26, Epiphany SE (Self-Etch), Activ GP, Sealapex, Endo CPM Sealer e Cimento Experimental à base de MTA (CE-MTA). Cento e trinta dentes humanos, unirradiculares e extraídos foram divididos em oito grupos experimentais (n=15) e dois grupos controle (n=5). O preparo biomecânico dos canais radiculares foi realizado pela técnica escalonada sob irrigação com solução de hipoclorito de sódio a 1% e ao final solução de EDTA 17%. A obturação foi realizada pela técnica de condensação lateral ativa com cones de guta-percha e um dos cimentos endodônticos ou com cones Resilon e cimento Epiphany SE. Os canais radiculares de um grupo controle foram obturados sem cimento endodôntico e em outro toda superfície externa foi impermeabilizada. Após sete dias mantidos em estufa a 37°C e umidade, o material obturador foi removido parcialmente do canal radicular, sendo mantida uma extensão de 13 mm. Os dentes foram esterilizados em gás óxido de etileno e montados em dispositivo de avaliação da infiltração bacteriana, deixando 5 mm da sua porção apical imerso em caldo BHI. Enterococcus faecalis foi inoculado na porção coronária e sua viabilidade testada a cada 48 horas. As amostras foram observadas diariamente durante 16 semanas para constatação ou não da turvação no meio de cultura posicionado na porção periapical. Os dados foram submetidos aos testes estatísticos de Kaplan-Meier, Kruskal-Wallis e Dunn em nível de significância de 5%. AH Plus e Sealapex apresentaram maior resistência à infiltração coronária, com diferença estatística significante em relação aos cimentos...
The aim of this study was to evaluate the bacterial sealing ability of different endodontic sealers: Endofill (EDF), AH Plus (AHP), Sealer 26 (S26), Epiphany SE (ESE), Activ GP (AGP), Sealapex (SEL), Endo CPM Sealer (CPM) and an experimental MTA-based cement (E-MTA). A hundred and thirty extracted single-rooted human teeth were randomly divided into eight experimental groups (n=15) and two control groups (n=5). Canals were prepared by a step-back technique, irrigated with 1% sodium hypochlorite and EDTA 17%, then filled with gutta-percha and one of the root canal sealers or Resilon and Epiphany SE. Teeth in one of the control groups were filled without sealer and those in the other control group were made impermeable. Teeth were kept at 37°C for 7 days. The coronal portion of the obturating material was removed, leaving 13mm intact. Teeth were sterilized with ethylene oxide gas prior to bacterial leakage assessment. The apical 5 mm of the roots was immersed in BHI broth, which was renewed every 48 hours and Enterococcus faecalis viability was tested at those periods. Leakage was monitored every 24 hours for 16 weeks. Data were analyzed by the Kaplan-Meier, Kruskal-Wallis and Dunn tests at 5% significance. AHP and SEL demonstrated better resistance to bacterial leakage than the other sealers (p<0.05). EDF, ESE and S26 presented intermediate bacterial leakage. AGP, CPM and E-MTA showed more bacterial leakage among all materials tested. All sealers allowed bacterial leakage. The best sealing ability was observed for AH Plus and Sealapex. The glass ionomer and MTA-based materials allowed the most bacterial leakage
Oliveira, Ana Carolina Mascarenhas. "Infiltração bacteriana em obturações realizadas com diferentes cimentos endodônticos /." Araraquara : [s.n.], 2010. http://hdl.handle.net/11449/95393.
Full textAbstract: The aim of this study was to evaluate the bacterial sealing ability of different endodontic sealers: Endofill (EDF), AH Plus (AHP), Sealer 26 (S26), Epiphany SE (ESE), Activ GP (AGP), Sealapex (SEL), Endo CPM Sealer (CPM) and an experimental MTA-based cement (E-MTA). A hundred and thirty extracted single-rooted human teeth were randomly divided into eight experimental groups (n=15) and two control groups (n=5). Canals were prepared by a step-back technique, irrigated with 1% sodium hypochlorite and EDTA 17%, then filled with gutta-percha and one of the root canal sealers or Resilon and Epiphany SE. Teeth in one of the control groups were filled without sealer and those in the other control group were made impermeable. Teeth were kept at 37°C for 7 days. The coronal portion of the obturating material was removed, leaving 13mm intact. Teeth were sterilized with ethylene oxide gas prior to bacterial leakage assessment. The apical 5 mm of the roots was immersed in BHI broth, which was renewed every 48 hours and Enterococcus faecalis viability was tested at those periods. Leakage was monitored every 24 hours for 16 weeks. Data were analyzed by the Kaplan-Meier, Kruskal-Wallis and Dunn tests at 5% significance. AHP and SEL demonstrated better resistance to bacterial leakage than the other sealers (p<0.05). EDF, ESE and S26 presented intermediate bacterial leakage. AGP, CPM and E-MTA showed more bacterial leakage among all materials tested. All sealers allowed bacterial leakage. The best sealing ability was observed for AH Plus and Sealapex. The glass ionomer and MTA-based materials allowed the most bacterial leakage
Orientador: Juliane Maria Guerreiro Tanomaru
Coorientador: Mário Tanomaru-Filho
Banca: Fábio Luiz Camargo Villela Berbert
Banca: Evandro Watanabe
Mestre
Faria, Renata [UNESP]. "Avaliação da microinfiltração bacteriana nas interfaces entre pilares e implantes." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/105585.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O objetivo nesta pesquisa foi avaliar a infiltração bacteriana in vitro na interface entre o pilar e o implante, comparando-se três tipos de conexões protéticas: Hexágono Externo (HE), Hexágono Interno Indexado (HII) e Cone Morse (CM). Sob condições estéreis, foi inoculada colônia de Escherichia coli na porção apical do parafuso do pilar. Após, os pilares foram fixados aos implantes com torque de 20 N/cm. Foram descartadas as amostras que apresentaram contaminação externa imediata. As amostras foram colocadas em tubos de ensaios contendo 2 ml de caldo TSB estéril. Em acompanhamento diário, por 7 dias, os caldos que se apresentaram turvos foram semeados em placa de petri com TSA e incubados em estufa bacteriológica à 37oC por 24 horas, para a observação de crescimento bacteriano. Coloração Gram foi realizada tanto no caldo quanto na colônia resultante da semeadura, para comprovação da presença de E. coli (Gram-negativo). Ao final do período, todas as amostras foram separadas, o conteúdo interno foi coletado com cone de papel e solução salina e semeado em placas de petri contendo TSA, levadas à estufa bacteriológica a 37º C por, 24 horas para verificar a viabilidade das bactérias. As amostras que não continham E.coli viáveis no seu interior foram descartadas do resultado final. Após os descartes por contaminação externa e inviabilidade, obtiveram-se os seguintes números de amostra: 38 (HE), 40 (HII) e 41 (CM). Os resultados, em % de amostras com infiltração bacteriana, foram submetidos ao teste de comparações múltiplas de proporções. As curvas de sobrevivência foram analisadas pelo método de Kaplan-Meyer e comparadas pelo teste estatístico de Log-Rank. Não houve diferença entre HE (10,53%), HII (4,88%) e CM (7,50%). As curvas de sobrevivência não diferiram entre si. A infiltração bacteriana ocorreu de modo...
The aim of this study was to evaluate, in vitro, the bacterial leakage between implant and abutment comparing three kinds of implantabutments connections: extern hexagon (EH), indexed intern hexagon (IIH) and morse-taper (MT). Under sterile controlled conditions, the tip of the abutment screw was inoculated with Escherichia coli culture and then the abutment was placed in position and tightened (20N/cm). The specimen was discarded if an external contamination of the outer surface was observed. Each specimen was incubated in a glass tube containing 2mL of sterile TSB medium at 37oC. The growth of E. Coli in the medium was registered every 24h. Once the sample showed cloudy broth, it was individually plated on TSA plates and incubated in an anaerobic chamber at 37oC for 24h, in order to observe the bacterial growth. Gram test was performed both in the medium and in the culture to certify the presence of E. Coli (Gram negative). After 7 days, each test specimen was sampled using a sterile paper point which was incubated in TSA plates and incubated in anaerobic chamber at 37oC for 24h, to verify bacterial viability. Samples that did not show bacterial viability in the end of the study were eliminated from the final results. After that, there were 38 EH samples, 40 IIH samples and 41 CM samples. The results, in %, of bacterial leakage, were statistically evaluated by multiple comparisons for proportion. The survival curves were analyzed by Kaplan-Meyer method and compared by statistical test of Log-Rank. There was no statistical difference among EH (10,53%), IIH (4,88%) e MT (7,50%). The three survival curves did not differ (p>0.005). It was conclude that the bacterial leakage occurred in a similar way for the three kinds of implant-abutment interface, no matter the assembly configuration.
Cunha, Thais Vieira Rizzo Nunes da. "Infiltração bacteriana em canais radiculares obturados com diferentes cimentos endodônticos e duas técnicas obturadoras." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/25/25147/tde-06122011-102950/.
Full textThe aim of this study was to assess ex-vivo the leakage of Enterococcus faecalis in root canals filled with endodontic sealers AHPlus, RealSeal and the experimental sealer Sealepox, after the lateral condensation or warm vertical condensation techniques. One hundred single rooted extracted human teeth had their root canals instrumented and their crowns removed for the conducting of the obturation. An experimental bacterial leakage setup was designed for fixing the root canal in the contained media, sterile and specific for the bacteria in study. The inoculation with Enterococcus faecalis was conducted and for 60 days the media was checked daily for possible change in its clear aspect, which would than, characterize the contamination by the bacteria through the root canal. All the sample which were infiltrated, totally or not, were processed and colored by the Brown and Brenn technique for observation of presence and location of Enterococcus faecalis in the root canal or dentinal tubules. With the methodology for bacterial leakage considered, the results obtained showed that none of the sealer neither the techniques employed were able to avoid leakages. Nevertheless, leakage happened in a small number of samples, where no statistical difference could be found between sealers and techniques. In regards to the microscopy analysis, presence of microorganisms was observed in practically all the samples. Such an observation, suggests that bacterial leakage is not a trustworthy indicator for qualifying sealing obtained by sealers in root canals.
Zardo, Eduardo Luis. "Avaliação in vitro da infiltração bacteriana na vedação de diferentes sistemas de implantes dentários." reponame:Repositório Institucional da UFPR, 2011. http://hdl.handle.net/1884/25632.
Full textLima, Elen Guerra de [UNESP]. "Infiltração bacteriana nas interfaces entre implantes e pilares: efeito do desenho das conexões protéticas." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/123116.
Full textO objetivo do estudo foi avaliar a microinfiltração bacteriana in vitro na interface entre o pilar e o implante, comparando-se Hexágono Externo (HE), Hexágono Interno (HI), Conexão Cônica (CC), sendo esta última de 3 tipos diferentes de desenho dos componentes protéticos. Para tal, 150 conjuntos (pilar/implante) foram utilizados, divididos em cinco grupos (n = 30). G1 - pilares HE; G2 - pilares HI; G3 - pilares CC do tipo sólido; G4 - pilares CC do tipo indexado; G5 - pilares CC do tipo linha zero. Para a avaliação, suspensão das bactérias Escherichia coli (ATCC 25922) e Streptococcus sanguinis (ATCC 10557) foram inoculadas na porção apical do parafuso do pilar, sob condições estéreis. Os pilares foram fixados aos implantes e torqueados segundo recomendações do fabricante, e imersos em caldo BHI estéril durante 14 dias. Ao final do período, os conjuntos foram separados, o conteúdo interno foi sonicado, diluído, semeado e levado a estufa bacteriológica (37 ºC por 48 horas) para verificação da viabilidade e contagem das bactérias. As amostras que não continham E. coli e S. sanguinis viáveis, foram descartadas do estudo. A morfologia bacteriana foi ainda observada em microscopia eletrônica de varredura (MEV). Os resultados, em % e unidades formadoras de colônias (UFCs) foram analisados por teste estatístico ANOVA 1 fator. Não houve diferença estatística entre G2 (9,09%), G3 (21,74%), G4 (22,73%) e G5 (11,11%). Analisando-se separadamente os grupos não-turvados com E. Coli (p = 0,126) e S. Sanguinis (p = 0,962) e os grupos turvados com E. coli e S. sanguinis (p = 0,655.) com Anova 1- fator (p < 0,05), não houve diferenças significantes na contagem de UFC entre os tipos de conexões
The aim of this study was to evaluate the in vitro bacterial microleakage at the interface between the abutment and the implant, comparing 3 types of prosthetic connections: External Hexagon (EH), Internal Hexagon (IH), Taper Connection (TC), the latter of 3 different types of the design of the abutments. For this, it was utilized 150 sets (abutment / implant), that were divided into 5 groups (n = 30). G1 (Control) - EH abutments; G2 - IH abutments; G3 - TC solid abutments; G4 - TC indexed abutments; G5 - TC zero line abutments. For this evaluation, suspension of the bacterial Escherichia coli (ATCC 25922) e Streptococcus sanguinis (ATCC 10557) were inoculated in the apical portion of the abutment screw, under sterile conditions. The abutments were fixed to the implants and torqued according to manufacturer's recommendations, and immersed in sterile BHI broth for 14 days. At the end of the period all sets were separated, the inner contents was be sonicated, diluted, seeded and taken to a bacteriological incubator (37 °C for 24 hours) to check the viability of the bacteria. The samples that did not contain viable E. coli e S. sanguinis were discarded from the study. The staining and bacterial morphology were observed in optical microscope and scanning electron microscopy (SEM). Results of colony forming units (CFUs) were analyzed by ANOVA 1 factor. There were no differences between the percentage of bacterial infiltration for IH (9.09%), CS (21.74%), CI (22.73%) e C0 (11.11%). Analising separetly the groups non-infritated with E. coli (p = 0,126) and S. Sanguinis (p = 0,962) and the groups infiltrated with E. coli and S. sanguinis (p = 0,655.) (p < 0,05), there no was statistical difference in the count of CFU/ml between the connections type
Lima, Elen Guerra de. "Infiltração bacteriana nas interfaces entre implantes e pilares: efeito do desenho das conexões protéticas /." São José dos Campos, 2014. http://hdl.handle.net/11449/123116.
Full textBanca: Renata Faria
Banca: Marco Antonio Bottino
Resumo: O objetivo do estudo foi avaliar a microinfiltração bacteriana in vitro na interface entre o pilar e o implante, comparando-se Hexágono Externo (HE), Hexágono Interno (HI), Conexão Cônica (CC), sendo esta última de 3 tipos diferentes de desenho dos componentes protéticos. Para tal, 150 conjuntos (pilar/implante) foram utilizados, divididos em cinco grupos (n = 30). G1 - pilares HE; G2 - pilares HI; G3 - pilares CC do tipo sólido; G4 - pilares CC do tipo indexado; G5 - pilares CC do tipo linha zero. Para a avaliação, suspensão das bactérias Escherichia coli (ATCC 25922) e Streptococcus sanguinis (ATCC 10557) foram inoculadas na porção apical do parafuso do pilar, sob condições estéreis. Os pilares foram fixados aos implantes e torqueados segundo recomendações do fabricante, e imersos em caldo BHI estéril durante 14 dias. Ao final do período, os conjuntos foram separados, o conteúdo interno foi sonicado, diluído, semeado e levado a estufa bacteriológica (37 ºC por 48 horas) para verificação da viabilidade e contagem das bactérias. As amostras que não continham E. coli e S. sanguinis viáveis, foram descartadas do estudo. A morfologia bacteriana foi ainda observada em microscopia eletrônica de varredura (MEV). Os resultados, em % e unidades formadoras de colônias (UFCs) foram analisados por teste estatístico ANOVA 1 fator. Não houve diferença estatística entre G2 (9,09%), G3 (21,74%), G4 (22,73%) e G5 (11,11%). Analisando-se separadamente os grupos não-turvados com E. Coli (p = 0,126) e S. Sanguinis (p = 0,962) e os grupos turvados com E. coli e S. sanguinis (p = 0,655.) com Anova 1- fator (p < 0,05), não houve diferenças significantes na contagem de UFC entre os tipos de conexões
Abstract: The aim of this study was to evaluate the in vitro bacterial microleakage at the interface between the abutment and the implant, comparing 3 types of prosthetic connections: External Hexagon (EH), Internal Hexagon (IH), Taper Connection (TC), the latter of 3 different types of the design of the abutments. For this, it was utilized 150 sets (abutment / implant), that were divided into 5 groups (n = 30). G1 (Control) - EH abutments; G2 - IH abutments; G3 - TC solid abutments; G4 - TC indexed abutments; G5 - TC zero line abutments. For this evaluation, suspension of the bacterial Escherichia coli (ATCC 25922) e Streptococcus sanguinis (ATCC 10557) were inoculated in the apical portion of the abutment screw, under sterile conditions. The abutments were fixed to the implants and torqued according to manufacturer's recommendations, and immersed in sterile BHI broth for 14 days. At the end of the period all sets were separated, the inner contents was be sonicated, diluted, seeded and taken to a bacteriological incubator (37 °C for 24 hours) to check the viability of the bacteria. The samples that did not contain viable E. coli e S. sanguinis were discarded from the study. The staining and bacterial morphology were observed in optical microscope and scanning electron microscopy (SEM). Results of colony forming units (CFUs) were analyzed by ANOVA 1 factor. There were no differences between the percentage of bacterial infiltration for IH (9.09%), CS (21.74%), CI (22.73%) e C0 (11.11%). Analising separetly the groups non-infritated with E. coli (p = 0,126) and S. Sanguinis (p = 0,962) and the groups infiltrated with E. coli and S. sanguinis (p = 0,655.) (p < 0,05), there no was statistical difference in the count of CFU/ml between the connections type
Mestre
Medeiros, Paulo Leal. "Avaliação comparativa \"in vitro\" da capacidade seladora do cimento MBPc, CPM, MTA Angelus® branco e pasta Lysanda® à infiltração bacteriana em obturações retrógradas." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/25/25138/tde-04112009-165951/.
Full textThe objective of this study was to in vitro evaluate the sealing ability of some dental retrofilling material and for that, we used the White MTA Angelus®, MBPc, CPM® cements and Lysande® paste, by examining Enterococcus faecalis infiltration. Ninety human extracted single-rooted teeth were instrumented, had their apex cut perpendicular to the long axis where the retrograde cavities were prepared with 3 mm deep, sealed with the retrofilling materials used on the study. Specific cultures of Enterococcus faecalis were prepared and inoculated into the teeths root canals previously fixed in special apparatuses that had in their opposite side a sterile type of culture specific for the bacteria in question, separated only by the retrofilling materials under test. Daily, the sterile culture was checked to verify their possible turbidity; and when there was, it demonstrated the bacterials passage by the retrofilling material. All experimental groups showed at least one specimen with bacterial infiltration in the very first 24 hour testing, however, the number of specimens that showed turbidity had decreased numerically during the trial period of 120 days. White Angelus MTA®, CPM® and MBPC cements showed effective sealing capacity and also similar behavior among themselves, because the turbidity of the few samples occurred just in the first three days. Lysanda® paste presented the greatest number of samples infiltrated (18), in a greater period of time.
Cardoso, Mayra [UNESP]. "Influência da deposição de filmes de carbono tipo diamante na infiltração bacteriana pela interface entre implantes e pilares protéticos." Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/105551.
Full textO estudo avaliou a influência da deposição de filmes de DLC na infiltração bacteriana pela interface entre pilares protéticos e implantes de hexágono externo (HE) e interno (HI). Também avaliou a aderência microbiana a estes filmes, depositados sobre titânio. A deposição dos filmes foi realizada por PECVD (Deposição Química a Vapor Assistida por Plasma), e sua caracterização foi feita pelas análises de perfilometria mecânica, espectroscopia Raman, rugosidade, análise tribológica, espectroscopia de energia dispersiva e ângulo de contato. Para avaliação da aderência microbiana, lâminas de titânio (N=45; n=15) foram divididas em três grupos: (1) sem filme (controle); (2) com filme de DLC; e (3) com filme de DLC dopado com prata (DLC-Ag). Elas foram suspensas em poços contendo saliva-glicerol e caldo de cultura. Após 48 h de incubação, elas foram agitadas em ultrassom e a suspensão resultante foi diluída e semeada em placas para contagem de microrganismos. Para avaliação da infiltração bacteriana pela interface implante/pilar, conjuntos de implantes e pilares HE e HI (N=180; n=30) foram divididos de acordo com o tratamento da base do pilar: (1) nenhum tratamento (controle); (2) deposição de filme de DLC; e (3) deposição de filme de DLC-Ag. Sob condições assépticas, foi inoculado 1 μL de suspensão de Enterococcus faecalis no interior dos implantes, e os pilares foram parafusados com 20 Ncm. Os conjuntos foram testados para contaminação externa imediata, suspensos em tubos de ensaio contendo caldo de cultura estéril, e acompanhados por cinco dias. A turvação do caldo indicou infiltração bacteriana. Ao final do período, os pilares foram desparafusados e o conteúdo interno dos implantes foi coletado com cone de papel e semeado em placas de Petri. Estas foram levadas a estufa bacteriológica por 24 h para verificação da viabilidade bacteriana....
This study evaluated the influence of DLC films on bacterial leakage through the interface between abutments and dental implants of external hexagon (HE) and internal hexagon (HI). It also evaluated microbial adhesion to these films deposited on titanium. The deposition of the films was performed by PECVD (Plasma Enhanced Chemical Vapor Deposition), and its characterizations were done by mechanical profilometry, Raman spectroscopy, surface roughness, tribological analysis, energy dispersive spectroscopy and contact angle. To evaluate the microbial adhesion, titanium blades (N=45, n=15) were divided into three groups: (1) without film (control), (2) with DLC film, and (3) with DLC film doped with silver (Ag-DLC). They were suspended in wells containing saliva-glycerol broth. After 48 h incubation they were ultrasonicated and the resulting suspension was diluted and plated for CFU counting. For evaluation of bacterial leakage through implant/abutment interface, sets of implants and abutments (N=180, n=30) were divided according to the treatment of the base of the abutment: (1) no treatment (control); (2) deposition of DLC film, and (3) deposition of Ag-DLC film. Under aseptic conditions, 1 μL of Enterococcus faecalis was inoculated inside the implants, and abutments were tightened to 20 Ncm. The sets were tested for immediate external contamination, suspended in test tubes containing sterile culture broth, and followed for five days. The turbidity of the broth indicated bacterial leakage. At the end of the period, the abutments were removed and the internal content of the implants was collected with paper cone and seeded in Petri dishes. These were incubated for 24 h for assessment of bacterial viability and CFU counting. The roughness and log10CFU/mL data were analyzed by analysis of variance. The bacterial leakage was analyzed by Chi-square test, Fisher exact test, Kaplan-Meier and ....
Cardoso, Mayra. "Influência da deposição de filmes de carbono tipo diamante na infiltração bacteriana pela interface entre implantes e pilares protéticos /." São José dos Campos, 2013. http://hdl.handle.net/11449/105551.
Full textCo-orientador: Argemiro Soares da Silva Sobrinho
Banca: Cristiane Yumi Koga-Ito
Banca: Luiz Carlos Santiago da Costa
Banca: Marcos Massi
Banca : Nelson Luiz de Macedo
Resumo: O estudo avaliou a influência da deposição de filmes de DLC na infiltração bacteriana pela interface entre pilares protéticos e implantes de hexágono externo (HE) e interno (HI). Também avaliou a aderência microbiana a estes filmes, depositados sobre titânio. A deposição dos filmes foi realizada por PECVD (Deposição Química a Vapor Assistida por Plasma), e sua caracterização foi feita pelas análises de perfilometria mecânica, espectroscopia Raman, rugosidade, análise tribológica, espectroscopia de energia dispersiva e ângulo de contato. Para avaliação da aderência microbiana, lâminas de titânio (N=45; n=15) foram divididas em três grupos: (1) sem filme (controle); (2) com filme de DLC; e (3) com filme de DLC dopado com prata (DLC-Ag). Elas foram suspensas em poços contendo saliva-glicerol e caldo de cultura. Após 48 h de incubação, elas foram agitadas em ultrassom e a suspensão resultante foi diluída e semeada em placas para contagem de microrganismos. Para avaliação da infiltração bacteriana pela interface implante/pilar, conjuntos de implantes e pilares HE e HI (N=180; n=30) foram divididos de acordo com o tratamento da base do pilar: (1) nenhum tratamento (controle); (2) deposição de filme de DLC; e (3) deposição de filme de DLC-Ag. Sob condições assépticas, foi inoculado 1 μL de suspensão de Enterococcus faecalis no interior dos implantes, e os pilares foram parafusados com 20 Ncm. Os conjuntos foram testados para contaminação externa imediata, suspensos em tubos de ensaio contendo caldo de cultura estéril, e acompanhados por cinco dias. A turvação do caldo indicou infiltração bacteriana. Ao final do período, os pilares foram desparafusados e o conteúdo interno dos implantes foi coletado com cone de papel e semeado em placas de Petri. Estas foram levadas a estufa bacteriológica por 24 h para verificação da viabilidade bacteriana....
Abstract: This study evaluated the influence of DLC films on bacterial leakage through the interface between abutments and dental implants of external hexagon (HE) and internal hexagon (HI). It also evaluated microbial adhesion to these films deposited on titanium. The deposition of the films was performed by PECVD (Plasma Enhanced Chemical Vapor Deposition), and its characterizations were done by mechanical profilometry, Raman spectroscopy, surface roughness, tribological analysis, energy dispersive spectroscopy and contact angle. To evaluate the microbial adhesion, titanium blades (N=45, n=15) were divided into three groups: (1) without film (control), (2) with DLC film, and (3) with DLC film doped with silver (Ag-DLC). They were suspended in wells containing saliva-glycerol broth. After 48 h incubation they were ultrasonicated and the resulting suspension was diluted and plated for CFU counting. For evaluation of bacterial leakage through implant/abutment interface, sets of implants and abutments (N=180, n=30) were divided according to the treatment of the base of the abutment: (1) no treatment (control); (2) deposition of DLC film, and (3) deposition of Ag-DLC film. Under aseptic conditions, 1 μL of Enterococcus faecalis was inoculated inside the implants, and abutments were tightened to 20 Ncm. The sets were tested for immediate external contamination, suspended in test tubes containing sterile culture broth, and followed for five days. The turbidity of the broth indicated bacterial leakage. At the end of the period, the abutments were removed and the internal content of the implants was collected with paper cone and seeded in Petri dishes. These were incubated for 24 h for assessment of bacterial viability and CFU counting. The roughness and log10CFU/mL data were analyzed by analysis of variance. The bacterial leakage was analyzed by Chi-square test, Fisher exact test, Kaplan-Meier and ....
Doutor
Pinheiro, Cláudia Ramos [UNESP]. "Avaliação da infiltração bacteriana corono-apical de canais radiculares obturados com diferentes tipos de cimentos endodônticos." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/90399.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Avaliamos a infiltração coroa-ápice da bactéria Enterococcus faecalis em incisivos centrais bovinos instrumentados e obturados com os cimentos endodônticos AH Plus, Endofill, Epiphany, Acroseal e o cimento experimental à base do Polímero da mamona (Polifil). Foi confeccionado um dispositivo a ser adaptado na porção inferior de tubos de centrífuga, Eppendorf. As raízes, previamente obturadas, foram inseridas nesse dispositivo até que 5mm se projetasse para fora do tubo plástico. A junção entre o tubo e a raiz foi selada com araldite, assim como a porção da raiz, externa ao recipiente, excluindo-se 1 mm ao redor do forame apical. O dispositivo Eppendorf e raiz obturada foram fixados em frasco tipo penicilina, contendo caldo .Brain heart infusion.. Com auxílio de uma pipeta, 1mL da bactéria foi transferido ao caldo B.H.I. e 400 µL de uma cultura recente foram transferidos para a porção superior do tubo. Durante 64 dias, a infiltração bacteriana era detectada através da turvação do caldo. Os resultados foram submetidos à análise estatística. Foi utilizado o método não-paramétrico de Kaplan-Meier e o teste de Kruskal-Wallis, complementado por comparações múltiplas pelo teste de Dunn. Adotou-se o nível de significância de 5%. Os cimentos AH Plus e Endofill apresentaram resistência à infiltração bacteriana significativamente menor do que o Polifil, mas estatisticamente equivalentes entre si. Os cimentos Epiphany e Acroseal deram resultados intermediários e equivalentes, mas sem diferença estatisticamente significante em relação aos outros cimentos.
This study compared some of the endodontic sealers sealing ability (AH Plus, Epiphany, Acroseal, Endofill and Polifil (a castor oil-based experimental sealer) using the active lateral condensation technique, through a bacterial test, during 64 days. One hundred bovine incisors were selected and divided into five experimental groups and two control groups (negative and positive ones). The teeth were cleaned and shaped by the step-back technique, then, they were filled with the endodontic sealers and stored in (100%) wet environment. The roots were impermeabilized with araldite glue, adapted into an eppendorf microtube and sterilized by ethylen oxide gas. The root/ eppendorf microtube was added to penicillin flasks containing 6mL of BHI broth kept at 37º C for 4 days to confirm sterilization. After this period, 400µL of Enterococcus faecalis ATCC 29212 were inserted at the upper portion of the eppendorf microtube. Daily leakage was evaluated through the broth turbidy. The results were submitted to the statistical analysis (Kaplan-Meier method as well as Kruskal-Wallis´ and Dunn´s tests). AH Plus and Endofill sealers were statistically equivalent concerning the sealing property, showing less resistance to the bacterial leakage than Polifil, while Acroseal and Epiphany had similar and intermediate behavior, but without numerical significance when compared to the other sealers.
Pinheiro, Cláudia Ramos. "Avaliação da infiltração bacteriana corono-apical de canais radiculares obturados com diferentes tipos de cimentos endodônticos /." Araraquara : [s.n.], 2008. http://hdl.handle.net/11449/90399.
Full textBanca: Carlos Benatti Neto
Banca: Antonio Carlos Bombana
Resumo: Avaliamos a infiltração coroa-ápice da bactéria Enterococcus faecalis em incisivos centrais bovinos instrumentados e obturados com os cimentos endodônticos AH Plus, Endofill, Epiphany, Acroseal e o cimento experimental à base do Polímero da mamona (Polifil). Foi confeccionado um dispositivo a ser adaptado na porção inferior de tubos de centrífuga, Eppendorf. As raízes, previamente obturadas, foram inseridas nesse dispositivo até que 5mm se projetasse para fora do tubo plástico. A junção entre o tubo e a raiz foi selada com araldite, assim como a porção da raiz, externa ao recipiente, excluindo-se 1 mm ao redor do forame apical. O dispositivo Eppendorf e raiz obturada foram fixados em frasco tipo penicilina, contendo caldo .Brain heart infusion.. Com auxílio de uma pipeta, 1mL da bactéria foi transferido ao caldo B.H.I. e 400 µL de uma cultura recente foram transferidos para a porção superior do tubo. Durante 64 dias, a infiltração bacteriana era detectada através da turvação do caldo. Os resultados foram submetidos à análise estatística. Foi utilizado o método não-paramétrico de Kaplan-Meier e o teste de Kruskal-Wallis, complementado por comparações múltiplas pelo teste de Dunn. Adotou-se o nível de significância de 5%. Os cimentos AH Plus e Endofill apresentaram resistência à infiltração bacteriana significativamente menor do que o Polifil, mas estatisticamente equivalentes entre si. Os cimentos Epiphany e Acroseal deram resultados intermediários e equivalentes, mas sem diferença estatisticamente significante em relação aos outros cimentos.
Abstract: This study compared some of the endodontic sealers sealing ability (AH Plus, Epiphany, Acroseal, Endofill and Polifil (a castor oil-based experimental sealer) using the active lateral condensation technique, through a bacterial test, during 64 days. One hundred bovine incisors were selected and divided into five experimental groups and two control groups (negative and positive ones). The teeth were cleaned and shaped by the step-back technique, then, they were filled with the endodontic sealers and stored in (100%) wet environment. The roots were impermeabilized with araldite glue, adapted into an eppendorf microtube and sterilized by ethylen oxide gas. The root/ eppendorf microtube was added to penicillin flasks containing 6mL of BHI broth kept at 37º C for 4 days to confirm sterilization. After this period, 400µL of Enterococcus faecalis ATCC 29212 were inserted at the upper portion of the eppendorf microtube. Daily leakage was evaluated through the broth turbidy. The results were submitted to the statistical analysis (Kaplan-Meier method as well as Kruskal-Wallis' and Dunn's tests). AH Plus and Endofill sealers were statistically equivalent concerning the sealing property, showing less resistance to the bacterial leakage than Polifil, while Acroseal and Epiphany had similar and intermediate behavior, but without numerical significance when compared to the other sealers.
Mestre
Nascimento, Cássio do. "Avaliação da infiltração bacteriana através da interface implante-conector protético sob aplicação de carga - avaliação in vitro pelo método DNA Checkerboard." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-18102010-161559/.
Full textBacterial leakage along the implant-abutment interface with consequent species harboring the inner parts of two-part dental implant systems has been reported. The aim of this in vitro study was to evaluate the bacterial leakage from human saliva to the internal part of the implants along the implant-abutment interface under loading conditions. Sixty dental implants, 20 for each external or internal hexagon and morse cone connection, and their conical abutments were used in this study. Each connection was sub-divided in 2 groups (n=10), loaded implants and control (unloaded). Previously to the bacterial leakage test, samples from the inner parts of the implants were collected with sterile microbrushes as negative control of contamination. The abutments were tightened to 20 Ncm on the implants. The assemblies were immersed in human saliva and loaded with 500,000 cycles of 120 N in experimental or incubated for 7 days at 35°C in control group. After this period, possible contamination of the internal parts of the implants was evaluated using the DNA Checkerboard method. Microorganisms were found in the internal surfaces of all connections evaluated. Morse cone connection presented the lowest count of microorganisms in control and loading group. Loaded implants present higher counts of microorganisms than control group in external and internal hexagon. No microorganisms were found in the samples recovered from the implants before contamination test (negative control). It can be concluded that bacterial species from human saliva may penetrate along the implant-abutment interface under unloaded and loaded conditions, and morse cone connection presented the lowest count of microorganisms.
Aun, Carmo Antonio. "Influência da irradiação com lasers de alta potência na microinfiltração bacteriana e fúngica em dentes humanos retrobturados com MTA." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/23/23145/tde-10072008-145617/.
Full textThis in vitro experimental study evaluated the microleakage of E. faecalis and C. albicans in roots whose ressected apical surfaces and retrocavities had suffered irradiation from Nd:YAG, Diode 810 nm and Er,Cr:YSGG lasers, and later retrofiled with MTA. Seventy roots had been prepared, obturated, had suffered apicoectomy and were retroprepared with diamond and conventional ultra-sonic tips in the average power. The division of specimens was in accordance with the used laser and the type of microorganism. The groups G1 and G5 had not been irradiated, G2 and G6 irradiated with Nd:YAG, G3 and G7 with Diode and G4 and G8 with Er, Cr:YSGG (n = 8). Positive (n = 3) and negative (n = 3) controls had been used. All procedures executed until this point had been carried inside an access difficulties simulation device. After the waterproofing, attachment of the roots in prepared tubes and sterilization, the retrofillings were made using white MTA. The superior chambers were inoculated with the microorganisms and inferior chambers were completed with sterile culture broth in contact with the root tip. The G1, G2, G3 and G4 groups had been inoculated with E. faecalis and the rest of the groups with C. albicans. The contaminated broths of the upper chambers were exchanged each 3 days and for 60 days the verification of the turbidity in the inferior chambers was evaluated daily. At the end, the results had indicated that: the positive control had 100% microleakage, the negative control none and the experimental groups had presented microleakege patterns that range from 50% (G1) to 100% (G2), with a total of 68.75% of all specimens presenting microleakage. Applying the Exact Fischer test and Kruskal-Wallis test (p > 0,05), no significant statistical difference between the groups were observed in any interaction. It can be concluded that the treatment of the retrocavities and ressected apical surface, with the lasers used in this study, did not modify the rate of E. faecalis and C. albicans microleakage in MTA retrofillings. Also the type of used microorganism did not seem to modify the amount of microleakage in the specimens.
Oliveira, Greison Rabelo de. "Analise "in vitro" da infiltração bacteriana e das adaptações na interface implante/conector protetico de sistemas de implantes endosseos." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289432.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O propósito deste estudo foi avaliar in vitro a contaminação bacteriana através da interface implante/conector protético de quatro marcas comerciais de implantes endósseos de titânio comercialmente puro, buscando correlacioná-la com as dimensões dos microespaços e das adaptações na referida interface. Todos os sistemas empregados foram de fabricação nacional. Para isto, utilizaram-se, 80 implantes de dois estágios cirúrgicos, com seus respectivos conectores protéticos, sendo 40 Hexágonos Externo e 40 Hexágono Interno, divididos em 08 grupos de acordo com as marcas comercias e tipo de hexágono, contendo 10 implantes cada grupo. Grupo 1HE (10 implantes HE Master Screw®) e grupo 1HI (10 implantes HI Master Conect AR®), grupo 2HE (10 implantes HE INP Teres®) e grupo 2HI (10 implantes HI INP®), grupo 3HE (10 implantes HE Titamax®) e grupo 3HI (10 implantes HI Titamax II®), e grupo 4HE (10 implantes HE Serson®) e grupo 4 HI (10 implantes HI Serson Implus®). A análise microbiológica foi realizada após a incubação da espécie Streptococcus sanguis na parte interna do implante. Os implantes foram removidos das embalagens e manipulados com pinças estéreis ao redor do bico de Bunsen, de maneira que não perdessem as características de fabricação ou sofressem qualquer tipo de contaminação externa. Em seguida foi realizada a adaptação de um conector protético parafusado manualmente a um torque que variou de 20 a 30 Ncm de acordo com as recomendações dos fabricantes. A composição foi inserida em um meio de cultura BHI (Brain Heart Infusion) armazenada em uma estufa bacteriológica por um período de 30 dias até que ocorresse ou não contaminação externa do meio BHI. Leituras diárias para verificação da contaminação foram realizadas nesse período. Após os 30 dias todos os implantes foram submetidos a uma análise em microscopia eletrônica de varredura para a verificação das dimensões dos microespaços na interface implante/conector protético, com aumento variando de 25 vezes até 2500 vezes. Observou-se uma grande diferença no grau de contaminação bacteriana entre as marcas de implantes variando de 0 % para os implantes Titamax II® (Neodent - hexágono interno) e Serson® (Serson - hexágono externo), até 90% para os implantes Teres® (INP - hexágono externo), apresentando diferenças estatísticas significativas. Porém, considerando-se apenas os tipos de hexágono, de um modo geral, pode-se verificar que não houve diferença estatisticamente significante, no grau de contaminação bacteriana entre os implantes de hexágono externo e interno. Sendo que a média do microespaço na interface implante/conector protético, encontrada na análise de microscopia eletrônica de varredura não apresentou correlação com o grau de contaminação bacteriana
Abstract: The purpose of this study was to evaluate in vitro the bacterial contamination through the implant/ prosthetic connector interface of four commercial brands of commercially pure titanium endosseous implants, and correlate it with the microgap dimensions in this interface. All implant systems are nationally manufactured. Eighty two-stage implants and their respective prosthetic connectors (40 external hexagon - HE and 40 internal hexagon - HI) were divided into 8 groups of 10 implants each, according to the commercial brands and hexagon type. Group 1HE (10 implants HE Master Screw®), group 1HI (10 implants HI Master Conect AR®), group 2HE (10 implants HE INP Teres®), group 2HI (10 implants HI INP®), group 3HE (10 implants HE Titamax®), group 3HI (10 implants HI Titamax II®), group 4HE (10 implants HE Serson®) and group 4HI (10 implants HI Serson Implus®). The microbiological analysis was performed by incubation of Streptococcus sanguis in the internal part of the implants. The implants were removed from their packages and manipulated with sterile tweezers near a Bunsen burner, to prevent contamination or loss of their characteristics. A prosthetic connector was then adapted manually with a 20 to 30 Ncm torque, according to the manufacturers¿ recommendations. The composition was inserted in a Brain Heart Infusion (BHI) culture medium, and stored in a bacteriological stove for a period of 30 days, until the external contamination of the BHI medium could be assessed. Daily evaluations to verify the contamination were performed in this period. After 30 days, all implants were subjected to a scanning electron microscopic (SEM) analysis to assess the dimension of the microgaps in the implant/ prosthetic connector interface, under a 25 to 2500x magnification. Different contamination degrees of the groups could be observed, varying from zero% in brands Titamax II® (Neodent - internal hexagon) and Serson® (Serson - hexagon external), to 90% in the implants Teres® (INP - hexagon external), with statistically significant differences. However, when all HE and all HI implants were compared, there was no significant difference in the contamination degrees between external and internal hexagon implants. The mean microgap in the implant/ prosthetic connector interface, found in the SEM, did not present a correlation with the bacterial contamination degrees
Mestrado
Cirurgia e Traumatologia Buco-Maxilo-Faciais
Mestre em Clínica Odontológica
Ricomini, Filho Antônio Pedro 1983. "Avaliação da perda de pre-carga e infiltração bacteriana em sistemas de implantes de encaixe conico e hexagono externo." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288134.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: A presença de microrganismos na interface implante e pilar é um dos fatores associado ao insucesso de implantes osseointegrados. Sistemas de implantes de encaixe cônico visam precisa adaptação entre o implante e o pilar, entretanto não se sabe o comportamento desses sistemas frente a condições de estresse da cavidade oral quanto à manutenção da pré-carga e capacidade de selamento bacteriano. Assim, o objetivo deste estudo foi avaliar a perda de précarga e a infiltração bacteriana na interface implante e pilar de sistemas de encaixe cônico e hexágono externo, submetidos à ciclagem térmica e fadiga mecânica (CF). Foram utilizados 48 implantes de quatro sistemas de implante-pilar divididos em 8 grupos (n=6): (1) hexágono externo e munhão universal; (2) hexágono externo e munhão universal com CF; (3) cone morse e munhão universal; (4) cone morse e munhão universal com CF; (5) cone morse e munhão universal parafuso passante; (6) cone morse e munhão universal parafuso passante com CF; (7) cônica justaposição e pilar padrão; (8) cônica justaposição e pilar padrão com CF. Os implantes foram fixados em resina epóxica e os pilares acoplados, realizando a pré-carga. Os espécimes (implante-pilar) foram submetidos à ciclagem térmica de 1.000 ciclos a 5°C e 55°C, com permanência de 60 s em cada banho, e à fadiga mecânica de 1,0 milhão de ciclos, 1,0 Hz e 120 N. O ensaio de infiltração bacteriana foi realizado com o microrganismo Streptococcus sanguinis (NCTC 10904). Os espécimes foram imersos em meio Tryptic Soy + Yeast Extract (TY) contendo S. sanguinis e incubados a 37°C e 10% CO2 por 72 h. Os valores de destorque foram registrados e os pilares foram desacoplados. Cone de papel estéril foi esfregado na parte interna do implante, inserido em um tubo contendo meio TY estéril e incubado. A presença de infiltração bacteriana foi avaliada por meio da turbidez do caldo. Implantes e pilares foram avaliados por meio de MEV. Os dados de perda de pré-carga foram submetidos à análise de variância a 2 critérios e ao teste de Tukey. Todos os sistemas apresentaram maiores valores de destorque quando submetidos à CF (p<0,05). O sistema cone morse com munhão universal apresentou os maiores valores de destorque quando comparado aos demais sistemas (p<0,01). Todos os sistemas cônicos apresentaram infiltração bacteriana. Dentro das condições experimentais, o sistema cone morse com munhão universal apresentou os maiores valores de destorque e não foi observado relação entre a perda da précarga e infiltração bacteriana.
Abstract: The presence of microorganisms in the implant and abutment interface is one of the factors associated to the osseointegrated implant failures. Conical junction implant systems have aimed a precise fit between implant and abutment, however, the behavior of these systems it is not known when submitted to the stress environment as found in the oral cavity, related to the preload maintenance and bacterial seal ability. Thus, the aim of this study was to evaluate the preload loss and the bacterial penetration through the implant-abutment interface of conical and external hexagon connection systems, submitted to thermal cycling and mechanical fatigue (TM). Forty eight implants of four different implant-abutment systems were divided in 8 groups (n=6): (1) external hexagon and universal post; (2) external hexagon and universal post with TM; (3) morse taper and universal post; (4) morse taper and universal post with TM; (5) morse taper and universal post two pieces; (6) morse taper and universal post two pieces with TM; (7) locking taper and standard abutment; (8) locking taper and standard abutment with TM. The implants were embedded in epoxy resin and the abutments were connected, setting the preload. The assemblies (implant-abutment) were submitted to thermal cycling of 1.000 cycles at 5°C and 55°C, with a dwell time of 60 s each and to mechanical fatigue, 1.0 million cycles, 1.0 Hz, 120 N. Bacterial penetration assay was performed with Streptococcus sanguinis (NCTC 10904). The assemblies were immersed in Tryptic Soy + Yeast Extract (TY) broth containing S. sanguinis and incubated at 37°C and 10% CO2 for 72 h. Detorque values were recorded and the abutments were disconnected. Sterile paper points were rubbed on the inner part of the implant and inserted in a tube with sterile TY broth and incubated. The presence or absence of bacterial penetration was assessed by the broth turbidity. Implants and abutments were observed by SEM. The preload loss data was analyzed by two-way ANOVA, followed by Tukey test. All the screw systems showed higher detorque values when submitted to TM(p<0,05). The morse taper system with universal post showed the highest detorque values when compared with the other systems (p<0,01). All the conical systems showed bacteria penetration. Within these experimental conditions, the morse taper system with universal post showed the higher detorque values and no relation between the preload loss and the bacterial penetration was observed.
Mestrado
Protese Dental
Mestre em Clínica Odontológica
Santos, Carla Gabaldo Pessoa dos. "Avaliação da passagem de micro-organismos por meio da interface entre implantes e conectores protéticos com parafusos convencionais planos e experimentais cônicos pela técnica DNA-Checkerboard." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-17052018-154257/.
Full textDespite the reliability and high success rates related to treatment with implants, failures of implant-supported oral rehabilitation are still persistent. These failures can cause both mechanical damage, such as loosening the retaining screw connections due to instability, as biological damage, such as inflammatory reactions in periimplants tissues due to the occurrence of bacterial leakage along the implant/abutment interface and the subsequent colonization of the subsequent colonization of the internal/inner parts of the implants and components. The mechanisms responsible for these mechanical/biological failures of implant systems are not fully elucidated, and changes to the models of prosthetic connections and retaining screws have been developed in order to increase the stability of connections and minimize these problems. However, the literature related to these changes and its impact on the implant-components stability is still inconclusive. The objective of this study was to evaluate microbiologically by the DNA-Checkerboard hybridization, the occurrence of bacterial leakage from the external environment to the interior of the implant through these different implant/abutment interface. For the study will be evaluated two different implant connections, one external hexagonal (EH) and other internal triangle (IT), with either conventional and experimental tapered screws abutment. Forty-eight two-part implants with external hexagon (EH; n = 24) or tri-channel internal (TI; n = 24) connections were investigated. Abutments were attached to implants with conventional flat-head or experimental conical-head screws. After saliva incubation, Checkerboard DNA-DNA hybridization was used to identify and quantify up to 38 bacterial colonizing the internal parts of the implants. Kruskal-Wallis test followed by Bonferroni\'s post-tests for multiple comparisons was used for statistical analysis. Twenty-four of thirty-eight species, including putative periodontal pathogens, were found colonizing the inner surfaces of both EH and TI implants. Peptostreptococcus anaerobios (P = 0.003), Prevotella melaninogenica (P < 0.0001), and Candida dubliniensis (P < 0.0001) presented significant differences between different groups. Means of total microbial count (×104 , ±SD) for each group were recorded as follows: G1 (0.27 ± 2.04), G2 (0 ± 0), G3 (1.81 ± 7.50), and G4 (0.35 ± 1.81). Differences in the geometry of implant connections and abutment screws have impacted the microbial leakage through the implant-abutment interface. Implants attached with experimental conical-head abutment screws showed lower counts of microorganisms when compared with conventional flat-head screws.
Amaral, Jose Ivo Queiroz do. "Analise in vitro da infiltração bacteriana e das desadaptações na interface implante/conector protetico em cinco sistemas de implantes endoosseos." [s.n.], 2003. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288706.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Doutorado
Teixeira, Wendel. "Avaliação in vitro da infiltração bacteriana na interface implante/componente protético em conexões dos tipos cone morse e hexágono interno." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-26032010-180717/.
Full textThe precision in the manufacture of an implant can be determined by the degree of adaptation at the abutment-implant interface. A poor adaptation allows the infiltration of microorganisms through this interface and colonization of empty spaces of the implants, leading to inflammatory reactions and clinical failure of treatment. The aim of the present in-vitro study was to investigate leakage of Staphylococcus aureus through the abutment-implant interface, by the method of bacterial culture. It was used twenty sets of Morse Taper implants with Pillars CM (NEODENTTM, Curitiba, Paraná, Brazil), divided into two groups: Group A, which were evaluated for bacterial infiltration into the inner part of the implants, and Group B, which were evaluated for bacterial infiltration from the inner part of the implants. Were also used twenty sets of Titamax II Plus implants, with the conical Mini Pillars II Plus (NEODENTTM, Curitiba, Paraná, Brazil), divided into two groups: Group C, which were evaluated for bacterial infiltration into the inner part of the implants and Group D, which were evaluated for bacterial infiltration from the inner part of the implants. In the evaluation of bacterial infiltration from the implants, the assemblies had the inner parts inoculated with S. aureus, and each assembly was incubated in BHI broth. For assessment of bacterial leakage into the implants, each assembly was submerged in S. aureus culture in tubes. Bacterial infiltration occurred in all groups, and there was no statistically significant difference between groups A and C, or between groups B and D.
Souza, Patrícia de Almeida Rodrigues da Silva e. ""Estudo 'in vitro' da infiltração bacteriana em obturações radiculares em dentes bovinos (influência do uso do E.D.T.A. à 17% e do laser de Er:YAG e Nd:YAG"." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/25/25138/tde-15032005-101055/.
Full textThis study assessed bacteria (E. Faecalis) penetration from crown to apex through root fillings in bovine teeth, according to the smear layer treatment. Ninety teeth were cleaned and 10mm of root cut to be used in the experiment. The canal was prepared using the classic instrumentation technique with 110, 120 and 130 Kerr files under 1% sodium hypoclorite. The teeth were divided into the following groups: I- Contact application of Nd:Yag laser 15Hz and 1,5W - in the apex-crown direction during 5 seconds (four times). II- In this group the same laser beam was used (Nd:YAG), however, with 15 Hz and 2,0W. III- Er:YAG laser with an output of 150mJ, with repetition rate of 10 Hz in four applications of 5 seconds, with circular movements in the apex crown direction throughout the canal wall, for 20 seconds. IV- (20 teeth) In this group the smear layer was removed with 17% of EDTA solution during 3 minutes, in both control groups. Next, the root canals were filled using lateral condensation technique and AH Plus cement. In the group V the root canals were filled with just one point without cement to simulate a deficient sealing. A special device was developed to analyze the bacterial penetration as follows: root placement in eppendorf plastic tubes, impermeabilization, sterilization with ethylene oxide, and posterior set in vials with BHI sterile. On the upper part of the plastic tube was applied 500 µL of E. Faecalis ATCC 29212, standardized in 5X105 UFC/mL. All this set were stored at 36 oC. The bacterial penetration was determined according to the blurriness culture. , checked daily, for 21 days. In the comparative analysis among groups, the Chi-squared test revealed significant differences (p=0,0024). So, the comparative test of Tukey was performed, that showed differences between groups II and III and groups II and IV (p< 0,05). Regarding the necessary time for bacteria penetration the Kruskall-Wallis test depicted differences among the groups. The Dunn test identified the differences between groups II and IV (p<0,05)
Taveira, Amélio Borges. "Avaliação comparativa 'in vitro' da capacidade seladora à infiltração bacteriana dos cimentos MTA branco, cinza e Sealapex consistente em obturações retrógradas." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/25/25138/tde-30092005-091215/.
Full textThe cements gray MTA Angelus, white MTA Angelus and Sealapex added of zinc oxide (consistent Sealapex) were evaluated accordind to their sealer abilility to the bacterial leakage. Eighty single-rooted extracted human teeth were used, all of them had their crown removed. The roots were divided aleatory in three experimental groups of 20 specimen, one for each cement, and in two groups of controls of 10 specimen each. The roots were resectioned with a 90 angle in relation to the long opening and were made 3 millimeters retrocavities deep, the external surface of all of the roots was impermeabled with Araldite, except the resectioned one. The roots were put in tubes of microcentrifuge and fixed with Araldite. The set (radix dentis and the tube of microcentrifuge) was sterilized in ethylene oxide, before this sterilization the retrocavities were filled with the tested cements, and this set was assembled in vials such as penicillin, containing BHI broth sterile. After this procedure, we deposited 400µl of Enterococcus faecalis culture ATCC 29212 inside the tube of microcentrifuge. The display (root, tube of microcentrifuge, glass and bacterium) was kept in kiln 37º C, during 120 days to the examination of blurriness of the culture, indicated of bacterium leakage, being the culture media inside the tube of microcentrifuge renovating weekly. At this time appeared leakage in 11 specimen of the gray MTA group, in 10 of consistent Sealapex and 9 of white MTA. Applying the Chi-Square Test to the achieved results, it was concluded that the tested cements behaved similar to the bacterium leakage during the tested experimental period.
Keedi, Caroline Bosquê. "Análise do efeito do dimetacrilato contra a infiltração bacteriana pela interface implante/componente protético através da PCR Real Time: um estudo in vivo." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/23/23150/tde-18032015-154447/.
Full textThe implant/prosthetic component interface often has gaps that serve as niches for bacterial colonization. The purpose of this study is to verify the effectiveness sealing this interface with dimethacrylate. Twenty two Straumann ® Bone Level implants was installed in areas with indication for single cemented prosthetic rehabilitation. The prosthetic components were installed in the control and experimental groups following the fabricant instructions, and adding the dimethacrylate in the interface of the experimental group. An initial collection and a second collection at the end of 90 days within each implant were performed, and after that, the technique of quantitative PCR was developed to analyze whether there was infiltration and detection of four bacterial species: Porphyromonas gingivalis, Treponema denticola, Tannerella forsythia. In the control group, all samples showed quantification of microorganisms, confirming bacterial percolation. In the control group, only 30% of the samples submitted quantification after the study period. Thus, the absence of bacteria in the experimental group was associated with the treatment for the period dimethacrylate. Considering the presence of at least one specific bacteria in the samples studied, the difference was also statistically significant. However, more studies should be conducted to verify that the seal will be effective for longer periods.
Alves, Ana Maria Hecke. "Avaliação in vivo da penetração bacteriana em canais obturados, expostos a diferentes pressões e ao meio oral por diferentes períodos de tempo." Florianópolis, 2012. http://repositorio.ufsc.br/xmlui/handle/123456789/99423.
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Metodologias ex vivo e in vitro para avaliação do selamento de canais obturados têm utilizado pressão para facilitar a infiltração de marcadores-fluídos como corantes, água e glicose. Porém, não há padrão na intensidade, forma e tempo de aplicação da pressão. Os objetivos deste estudo foram: 1) verificar a influência de duas intensidades de pressão (30 e 60 KPa) na penetração bacteriana em canais obturados; 2) correlacionar a profundidade desta penetração com o tempo de exposição ao meio oral (45 e 120 dias). Dentes de cães (n=122) foram instrumentados com o sistema ProTaper e obturados pela técnica do cone único de guta-percha com cimento AH Plus. Após a presa do cimento, os canais obturados foram divididos em grupos: A) não foram submetidos à pressão (n=34); B) submetidos a pressão de 30KPa (n=34); C) submetidos a pressão de 60KPa (n=34). O tempo de aplicação da pressão foi de 8 minutos. Após, todos os canais foram expostos ao meio oral de acordo com os sub-grupos: 1) 45 dias; 2) 120 dias. Todos os sub-grupos tiveram controle positivo e negativo. Decorridos estes períodos, os animais foram sacrificados, os dentes foram removidos e preparados para análise histobacteriológica. Com relação a pressão, o teste de Kruskal-Wallis não mostrou diferença estatística na penetração de micro-organismos entre os grupos A, B e C em ambos os períodos (45 dias p=0,903 e 120 dias p=0,211). Apesar de haver maior infiltração em 120 dias, não houve diferença estatística significativa na infiltração de bactérias quando comparados os tempos de exposição de 45 e 120 dias (p= 0,608). Concluiu-se que as pressões de 30 e 60 KPa não induziram modificações nas obturações a ponto de influenciar na penetração bacteriana nos diferentes períodos de tempo (p>0,05).
Sealability assessment methodologies (ex vivo and in vitro) in endodontics have used pressure to facilitate the infiltration of fluid markers such as dyes, water and glucose. However, there is no standardization on the intensity, form and duration in the applied pressure. The objectives of this study were: 1) to evaluate the influence of the two intensities of pressure (30 and 60 kPa) on the bacterial penetration in the root canal fillings; 2) to correlate the depth of penetration with time of exposure to the oral environment (45 and 120 days). Root canals of dogs' teeth (n=122) were instrumented with the ProTaper system and filled by the technique of single cone of guttapercha and AH Plus cement. After the sealer setting, root canal fillings were subjected to different pressures during 8 minutes according to groups: A) without pressure (n = 34), B) 30kPa (n = 34), C) 60 kPa (n = 34). After all root canal fillings were exposed to the oral environment in accordance with sub-groups: 1) 45 days; 2)120 days. All sub-groups had positive and negative control. After these periods, the animals were sacrificed and the specimens were removed and prepared for histobacteriological analysis. Regarding the pressure there was no difference in the penetration of micro-organisms among the groups A, B and C in both periods (45 days p=0,903 and 120 days p=0,211). There was no significant difference in the penetration of bacteria when compared to the exposure times of 45 days and 120 days (p=0.608), although greater infiltration occurred in 120 days. In conclusion, the pressure of 30 and 60 kPa did not induce alterations in fillings that influence on the penetration of bacteria in the different periods of exposure.
Fernandes, Flávio Henrique Carriço Nogueira. "Avaliação in vitro pelo método DNA-Checkerboard da eficácia de uma pasta antimicrobiana e da adição de sais de prata em pilares protéticos, no controle da contaminação bacteriana através da interface implante-conector." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-04122012-170450/.
Full textThe contemporary and modern dentistry has been preconized the use of dental implants for replacement of missing teeth. The micro-organisms presents in oral environment, particularly those related to periodontal disease, are responsible for the highest failure rates of dental implants. This study evaluated the occurrence of bacterial leakage through the abutmentimplant interface in Morse Taped (CM) and Hexagon Internal (HI) dental implants after the association with antimicrobial paste or addition of silver salts on the abutments. 72 titanium dental implants (Pross ® - Implant System, Dabi-Atlante, Ribeirão Preto, Brazil), 36 with internal hexagon connection type and 36 with cone-morse connection type, divided into groups as follows: group Antimicrobial Paste -12 implants HI / prosthetic connectors and 12 implants CM / prosthetic connectors, group Ion Silver-12 implants HI / prosthetic connectors and 12 implants CM / prosthetic connectors and Control Group-12 implants HI / prosthetic connectors and 12 implants CM / prosthetic connectors. The implants and prosthetic connectors have been removed from their packaging for applying of final torque (20N/cm). Previously, in one experimental group, a layer of antimicrobial paste was applied on the inner surface of implants and prosthetic connectors. The sets connector/implants were partially immersed in human saliva solution in test tubes and incubated in bacteriological oven at 37°C for 7 days. Subsequently, samples of the contents of internal prosthetic sets implantconnectors of the 3 groups were collected to detect and quantify micro-organisms, through the DNA Checkerboard Hybridization Technique. The morse taper implants had significantly lower bacterial count compared to internal hexagon implants in the control group (p <0.001), while for the group of Silver Ion and antimicrobial Paste, we observed an inverse behavior, higher counts of micro-organisms for Morse taper implants. Comparing the same connection implants, among the 03 groups examined, samples of implants Morse Taper Control groups, Antimicrobial Paste and Silver ions exhibited values of counts of micro-organisms in ascending order. The internal hexagon implants of the Control group showed higher counts of microorganisms followed by Antimicrobial Paste and Silver Ions groups, respectively. The 43 species analyzed in vitro infiltrated through the interface implant / abutment in both systems evaluated; For both the treatments (adding silver salts in the abutments walls and applying of the antimicrobial paste within the implants) there was decreased microbial leakage through the interface connection for the internal hexagon dental implants
Martins, Leonardo Arruda. "O significado do infiltrado inflamatório em pacientes diagnosticados com vaginose bacteriana em citologia em meio líquido (SUREPATH)." reponame:Repositório Institucional da UFC, 2015. http://www.repositorio.ufc.br/handle/riufc/13595.
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Vulvovaginitis ( VV ) are reported since the fi fth century BC as a major health problem in women. Infectious agents are the main causes . The most commons are bacterial vaginosis (BV ) and vulvovaginal candidiasis ( VC ) . BV is the leading cause of VV, characterized by a change in bacterial vaginal popu lation with a prevalence of an aerobes strains. It is been observed in BV , which by defini tion is a non-inflammatory c ondition, some cases with the presence of inflammatory cells. However, this finding is not yet well defined. In the presence of two simultaneous microorganisms the pictur es would be defined as mixed vaginitis, in which cytological features are poorly defined and perhaps to influence the inflammatory infiltration presence. At the same time, it has been suggested that BV may play a role in carcinogenesis of the cervix since it has been observed that cytologic atypia is more frequent in women with shift of the vaginal flora, it is questionable whether th e inflammatory finding deserve the attention of the cyt opathologist . Objective: to ev aluate findings of liquid-based cytology ( SurePath ® ) in patients diagnosed with BV according to the presence of inflammatory cells. It was an observational , an alytical and cross-sectional study conducted in 1132 women diagnosed with BV , in the pe riod of October 2012 to June 2013. For the diagnosis of BV was used criteria of more than 20 % of clue cells in the smear ( SurePath ® ). The smears were evaluated for identification of morphotypes of pathogens, inflammatory infiltration and epithelial cell atypia . Trichom onas vaginalis , Candida sp ., Mobiluncus sp ., Actinomyces sp ., Cytopathy suggestive of Herpes Simplex Virus were searched . The presence of more than five polymorphonuclear leukocytes per epithelial cell in high power field (1000 x ) was considered in flammatory infiltrate . The ag e of patients ranged from 14 to 73 years (mean = 34.3, SD = 10.9) . The number of pregnancies was between 0 and 11 (mean = 1.5, SD = 2.08 ) . Two hundred and nine ( 34 % ) patients reported use of contraception and 828 ( 73.1 % ) were conducting a rou tine examination.The most fr equent clinical complaint was discharge in 130 cases (11.5 % ). Macroscopic ev aluation of vaginal discharge revealed that the white / milky color 115 ( 46,7 % ) pr evailed. On speculum examination was noted that 994 ( 87.8 % ) cases had described finding of normal mucosa and 50 ( 4.4% ) of vaginal mucosa inflamation. The morphotypes associated with bact erial vaginosis were mostly Mobiluncus sp. in 208 cases (66 %) and Candida sp. in 86 cases (27.3%) . The atypical cells were found in 84 cases ( 7.5%) and among these, AS C -US in 43 cases ( 51.2 % ) , LSIL in 31 ( 37 % ) and HSIL in 03 ( 3.6% ) . It was obser ved in the presence of inflammatory infiltrate 55 ( 4.9% ) cases with Mobiluncus sp ( p < 00.1 , RR = 0.61 [ 0.55 to 0.68 ] ) . Candida sp and 81 ( 7.2% ) cases ( p < 0.001, RR = 5.47 [ 2.93-10.19 ] ) . regarding cytological atypia was observed in the presence of leukocyte infiltrate atypia in 51 cases ( 4.5 % ) . RR = 1.27 [ 1.05 to 1.52 ] ) Among these the most frequent atyp ia was ASC -US with 24 ( 2.1% ) cases with leukocyte infiltration and 19 ( 1.7 % ) cases without infiltrate ( p = 0.2729 , RR = 0 , 86 [ 0.63 to 1.18 ] ) . For cases of LSIL observed 11 case s (1.0 % ) in the group w ithout infiltrate and 20 cases ( 1.8 % ) with inflammatory inf iltrate ( p = 0.0298 , RR = 1.346 [ 1.02 to 1.76 ]). In cases of bacterial vaginosis, by its current de finition, the presence of inflammtory infiltration suggests the possibility of mixed vaginitis (with Candida sp ) or epithelial atypia .
As vulvovaginites (VV) são referidas desde o século V a.C. como importantes agravos à saúde da mulher. Os agentes infecciosos estão entre as principais causas. As VV mais comuns são a vaginose bacteriana (VB) e a candidíase vulvovaginal (CV). A VB é a principal causa de VV, caracterizada por mudança de população bacteriana vaginal com predomínio de cepas anaeróbias. Tem sido observado na VB, que por definição é um quadro não inflamatório, alguns casos com presença de células inflamatórias. No entanto, este achado ainda não está bem definido. A associação entre microrganismos seria apontada como um quadro de vaginite mista, cujas características citológicas estão pouco definidas e talvez influenciassem no quadro inflamatório. Ao mesmo tempo tem sido sugerido que a VB, pode desempenhar um papel na carcinogénese do colo do útero uma vez que tem sido observado que atipias citológicas são encontrados mais em mulheres com uma flora vaginal alterada, questiona-se se o achado inflamatório deveria chamar a atenção do citopatologista. O objeitvo do trabalho foi avaliar achados da citologia em meio líquido (SurePath®) em casos com diagnóstico de VB segundo a presença de infiltrado inflamatório.Foi realizado um estudo observacional, analítico e em corte transversal, em 1132 mulheres com diagnóstico de VB, no período de Outubro de 2012 a Junho de 2013. Para o diagnóstico de VB foi utilizado critério de mais de 20% de clue cells no esfregaço de citologia de base líquida (SurePath®). Os esfregaços foram avaliados para identificação de morfotipos de patógenos, infiltrado inflamatório e atipías celulares epiteliais. Foram pesquisados Trichomonas vaginalis., Cândida sp., Mobiluncus sp., Actinomyces sp., citopatia sugestiva de Herpes Vírus Simplex. Foi considerado infiltrado inflamatório a presença de mais de cinco leucócitos polimorfonucleados por célula epitelial em campo de imersão (1.000x). A idade das pacientes variou de 14 a 73 anos (média = 34,3; dp =10,9). O número de gestações ficou entre 0 e 11 (média =1,5; dp=2,08). Duzentos e nove (34,%) pacientes referiam fazer uso de método contraceptivo e 830 (73,1%) estavam realizando exame de rotina. Quando havia uma queixa clínica a mais freqüente foi corrimento em 130 casos (11,5%). A avaliação macroscópica do conteúdo vaginal revelou que o de cor branco/leitoso 115 (46,7%) prevaleceu. No exame especular foi anotado que 994 (87,8%) dos casos descritos tinha achado de mucosa normal e 50(4,4%) de colpite. Os morfotipos de patógenos associados ao quadro de vaginose bacteriana foram principalmente Mobiluncus sp.em 208 casos (66%) e Cândida sp.em 86 casos (27,3%). As atipías celulares foram encontradas em 84 casos (7,5%) e dentre estas, prevaleceram ASC-US em 43 casos (51,2%), LSIL em 31(37%) e HSIL em 03 (3,6%). Observou-se na presença de infiltrado inflamatório 55 (4,9%) casos com Mobiluncus sp. (p<00,1; RR=0.61 (0,55-0,68)] e Cândida sp 81(7,2%) casos (p<0,001; RR=5,47 (2,93-10,19). Com relação às atipias citológicas observou-se na presença de infiltrado leucocitário atipias em 51 casos (4,5%) (RR=1,27 ([1,05-1,52]). Dentre estas a mais frequente foi ASC-US com 24 (2,1%) casos com infiltrado leucocitário e 19(1,7%) casos sem infiltrado (p =0,2729; RR=0,87 ([0,63-1,18]). Já para casos de LSIL observou-se 20 casos (1,8%) com infiltrado e 11 casos (1,0%) no grupo sem infiltrado inflamatório (p=0,0298; RR=1,35 ([1,02-1,76]). Nos casos de vaginose bacteriana, por sua definição atual, a presença de infiltrado inflamatório sugere a possibilidade de vaginite mista (com Cândida sp) ou atipia epitelial.
Martins, Leonardo Arruda. "O significado do infiltrado inflamatÃrio em pacientes diagnosticados com vaginose bacteriana em citologia em meio lÃquido (SUREPATH)." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=13676.
Full textAs vulvovaginites (VV) sÃo referidas desde o sÃculo V a.C. como importantes agravos à saÃde da mulher. Os agentes infecciosos estÃo entre as principais causas. As VV mais comuns sÃo a vaginose bacteriana (VB) e a candidÃase vulvovaginal (CV). A VB à a principal causa de VV, caracterizada por mudanÃa de populaÃÃo bacteriana vaginal com predomÃnio de cepas anaerÃbias. Tem sido observado na VB, que por definiÃÃo à um quadro nÃo inflamatÃrio, alguns casos com presenÃa de cÃlulas inflamatÃrias. No entanto, este achado ainda nÃo està bem definido. A associaÃÃo entre microrganismos seria apontada como um quadro de vaginite mista, cujas caracterÃsticas citolÃgicas estÃo pouco definidas e talvez influenciassem no quadro inflamatÃrio. Ao mesmo tempo tem sido sugerido que a VB, pode desempenhar um papel na carcinogÃnese do colo do Ãtero uma vez que tem sido observado que atipias citolÃgicas sÃo encontrados mais em mulheres com uma flora vaginal alterada, questiona-se se o achado inflamatÃrio deveria chamar a atenÃÃo do citopatologista. O objeitvo do trabalho foi avaliar achados da citologia em meio lÃquido (SurePathÂ) em casos com diagnÃstico de VB segundo a presenÃa de infiltrado inflamatÃrio.Foi realizado um estudo observacional, analÃtico e em corte transversal, em 1132 mulheres com diagnÃstico de VB, no perÃodo de Outubro de 2012 a Junho de 2013. Para o diagnÃstico de VB foi utilizado critÃrio de mais de 20% de clue cells no esfregaÃo de citologia de base lÃquida (SurePathÂ). Os esfregaÃos foram avaliados para identificaÃÃo de morfotipos de patÃgenos, infiltrado inflamatÃrio e atipÃas celulares epiteliais. Foram pesquisados Trichomonas vaginalis., CÃndida sp., Mobiluncus sp., Actinomyces sp., citopatia sugestiva de Herpes VÃrus Simplex. Foi considerado infiltrado inflamatÃrio a presenÃa de mais de cinco leucÃcitos polimorfonucleados por cÃlula epitelial em campo de imersÃo (1.000x). A idade das pacientes variou de 14 a 73 anos (mÃdia = 34,3; dp =10,9). O nÃmero de gestaÃÃes ficou entre 0 e 11 (mÃdia =1,5; dp=2,08). Duzentos e nove (34,%) pacientes referiam fazer uso de mÃtodo contraceptivo e 830 (73,1%) estavam realizando exame de rotina. Quando havia uma queixa clÃnica a mais freqÃente foi corrimento em 130 casos (11,5%). A avaliaÃÃo macroscÃpica do conteÃdo vaginal revelou que o de cor branco/leitoso 115 (46,7%) prevaleceu. No exame especular foi anotado que 994 (87,8%) dos casos descritos tinha achado de mucosa normal e 50(4,4%) de colpite. Os morfotipos de patÃgenos associados ao quadro de vaginose bacteriana foram principalmente Mobiluncus sp.em 208 casos (66%) e CÃndida sp.em 86 casos (27,3%). As atipÃas celulares foram encontradas em 84 casos (7,5%) e dentre estas, prevaleceram ASC-US em 43 casos (51,2%), LSIL em 31(37%) e HSIL em 03 (3,6%). Observou-se na presenÃa de infiltrado inflamatÃrio 55 (4,9%) casos com Mobiluncus sp. (p<00,1; RR=0.61 (0,55-0,68)] e CÃndida sp 81(7,2%) casos (p<0,001; RR=5,47 (2,93-10,19). Com relaÃÃo Ãs atipias citolÃgicas observou-se na presenÃa de infiltrado leucocitÃrio atipias em 51 casos (4,5%) (RR=1,27 ([1,05-1,52]). Dentre estas a mais frequente foi ASC-US com 24 (2,1%) casos com infiltrado leucocitÃrio e 19(1,7%) casos sem infiltrado (p =0,2729; RR=0,87 ([0,63-1,18]). Jà para casos de LSIL observou-se 20 casos (1,8%) com infiltrado e 11 casos (1,0%) no grupo sem infiltrado inflamatÃrio (p=0,0298; RR=1,35 ([1,02-1,76]). Nos casos de vaginose bacteriana, por sua definiÃÃo atual, a presenÃa de infiltrado inflamatÃrio sugere a possibilidade de vaginite mista (com CÃn
Ribeiro, Adriana da Costa. "\"Terapia endodôntica associada à irradiação do canal radicular com laser de diodo: avaliação térmica, morfológica, microbiológica e da infiltração marginal apical\"." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/23/23145/tde-12032007-145556/.
Full textThe aim of this study was to evaluate the effects of diode laser irradiation associated with endodontic therapy. The aspects analyzed were: temperature rise at the external root surface, morphological changes at the dentine root walls, apical marginal leakage after root sealing, and microbiological reduction after laser irradiation. The temperature rise in inferior incisor teeth was monitored using a thermographic camera. Two laser treatment parameters were investigated: continuous emission mode (CW) with P = 2.5 W and pulsed emission mode (PL) with average power?P = 1.25 W. The morphological changes of irradiated samples were analyzed by SEM for both treatment modes and compared with a non-irradiated control group. The apical marginal leakage was measured after the immersion in methylene blue solution for irradiated (CW; P = 2.5 W) and non-irradiated samples sealed by one of the following endodontic sealers: N-Rickert, AH Plus or Apexit. The reduction in microbiological activity after conventional endodontic therapy and after laser irradiation was evaluated in primary endodontic infection using culture and PCR techniques, where the control group used conventional 0.5 % NaOCl solution and calcium hydroxide treatment was compared with laser irradiation (CW; P = 2.5 W). The reduction of viable anaerobic microorganisms, the quantity of E. faecalis and Lactobacillus per samples, and the rate of E. faecalis and Lactobacillus per viable microorganism were analyzed. The temperature rise at external root surface during root canal irradiation in both continuous and pulsed emission modes was demonstrated not exceed the safety limit of 10 ºC. The maximum median temperature variation was 8.6 °C (CW) at the continuous emission mode and 1.6 °C at pulsed mode (PL) (Wilcoxon, p < 0.05). The optimal ?resting time? between each of five irradiation cycles was 12 determined to be 20 seconds to allow for tissue cooling and hence to prevent potential dangerous rises in the tissue temperature. SEM analysis revealed melting of dentine and closure of dentinal tubules especially at apical third for both irradiation conditions. The apical marginal leakage was significant reduced in the irradiated samples sealed with Apexit (Kruskal Wallis, p < 0.05). The prevalence of the viable anaerobic microorganisms exhibited reduced with time in both the control and laser groups with no statistical difference (Mann-Whitney p > 0.05). The Lactobacillus rate per viable microorganisms in the control group was 22 % at the beginning of the treatment and decreasing to zero at the end. This microorganism was not detected in laser group. The rate of Enterococcus per viable microorganism ranged 36 % to 50 % in the control group and 22 % to 0 % in laser group at the begin and the end of treatments, respectively. The conclusion is that diode laser technology is suitable for applications in endodontic therapy under the conditions tested in this study, however, the biological effects are similar to well done conventional endodontic therapy.
Gingeira, António Manuel Pinto 1958. "Infiltração bacteriana em materiais de obturação retrógrada das apicectomias." Doctoral thesis, 2008. http://hdl.handle.net/10451/170.
Full textO retratamento endodôntico cirúrgico é presentemente uma intervenção bem estabelecida, com um desfecho favorável a ocorrer em 80 a 94% dos casos. Esta eficácia é devida principalmente a uma melhor compreensão da fisiopatologia das lesões periapicais, e também das interacções microbianas e da sua ecologia. Tecnicamente, o desenvolvimento de técnicas cirúrgicas mais precisas, combinado com a utilização de métodos de preparação apical mais eficazes e a introdução de novos materiais para obturação retrógrada mais biocompatíveis, contribuem também decisivamente para esta taxa de sucesso. A realização de uma obturação retrógrada visa impedir a passagem, para os tecidos peri-apicais, de bactérias não eliminadas do espaço canalar. Os materiais usados para a obturação da cavidade retrógada podem ter comportamentos biológicos diversos, com isso influindo no prognóstico, a médio e longo prazo, destas intervenções cirúrgicas. A literatura existente, por não ter homogeneização de condições de estudo e por avaliar um número diverso de variáveis, não permite uma conclusão fidedigna quanto ao papel que os materiais de obturação, usados no acto cirúrgico, realmente desempenham. Tentando contribuir para o esclarecimento da importância dos materiais usados na eficácia das obturações retrógradas, foi realizado um estudo de infiltração bacteriana in vitro. Para atingir este objectivo foi concebido um modelo de dupla câmara inovador, e foram testados seis materiais utilizados em obturações retrógradas. As bactérias utilizadas no teste foram Proteus mirabilis, Enterococcus fæcalis e Propionibacterium acnes. Utilizando 450 raizes de dentes recentemente extraídos, estas foram submetidas a tratamento endodôntico, apicectomia e obturação retrógrada com amálgama, compósito, gutta-percha, ionómero de vidro híbrido, óxido de zinco com ácido etoxi benzóico (SuperEBA) e agregado de trióxidos minerais (MTA), sendo depois expostas à presença de cada uma das bactérias e observando-se a existência ou não de crescimento. Outras 90 raizes foram também preparadas e serviram de controlos. Foi realizado o estudo estatístico dos resultados obtidos, utilizando análise do Quiquadrado, ANOVA a um e dois factores e regressões logísticas. Da análise dos resultados obtidos pode-se concluir que o MTA é, dos materiais estudados, aquele que obtura com maior eficácia as cavidades retrógradas, impedindo a infiltração bacteriana. O SuperEBA demonstrou eficácia inferior ao MTA quando a bactéria testada foi o E. fæcalis, mas semelhante quando as experiências foram realizadas com outras bactérias. Os outros quatro materiais testados demonstraram não ser eficazes no estabelecimento de uma barreira estanque à passagem de bactérias do espaço canalar para o exterior.
Surgical endodontic retreatment is presently a well established intervention, with anexpected favourable outcome of 80% to 94%. This efficacy is due mainly to a better understanding of the pathophysiology of the periapical lesions, and of microbial interactions and ecology along with the development of more precise, surgical techniques, combined with the use of improved retropreparation methods and the introduction of new and more biocompatible materials for retrofill. A retrofilling aims to prevent leakage of bacteria from the canal space to the periapical tissues. The materials that are used to fill the retropreparation may have distinct biological behaviours, and in such way may influence the middle and long term prognosis of endodontic surgery. Due to a lack of homogeneity in the studies conditions and and to discrepancies in the factors evaluated, the literature reviewed until now does not allow a definitive conclusion about the role of retrofilling materials. The present study is a contribution for the understanding of the importance of materials in the efficacy of the retrofill. For that purpose an in vitro bacterial leakage study was performed. A new dual-chamber model was designed, and six different materials were tested for their ability to provide a bacteria-tight seal when used as a retrofill. The bacteria used were Proteus mirabilis, Enterococcus fæcalis and Propionibacterium acnes. 450 roots of freshly extracted teeth were submitted to endodontic treatment, apicoectomy and then were retrofilled with amalgam, composite resin, resin reinforced glass ionomer, gutta-percha, zinc oxide with etoxibenzoic acid (SuperEBA) and mineral trioxide aggregate (MTA). The roots were then exposed to one of the bacteria chosen and observed for 60 days for bacterial growth in the second chamber of the experimental model. Another 90 roots were prepared the same way and were used as positive and negative controls. The results were statistically analized, using Chi-square, one and two way ANOVA and logistic regression analysis. From the results obtained in this study, it is possible to conclude that MTA is the material that will most certainly prevent bacterial leakage. SuperEBA is less effective than MTA when in presence of E. fæcalis but similar with the other bacteria tested. The other 4 materials tested proved to be inefficient in providing a bacteria-tight seal when used as retrofilling material.
Bernardino, José Pedro Casimiro de Duarte. "Método "in vitro" para avaliação da micro-infiltração bacteriana em materiais de obturação endodôntica." Dissertação, 2013. https://repositorio-aberto.up.pt/handle/10216/86144.
Full textBernardino, José Pedro Casimiro de Duarte. "Método "in vitro" para avaliação da micro-infiltração bacteriana em materiais de obturação endodôntica." Master's thesis, 2013. https://repositorio-aberto.up.pt/handle/10216/86144.
Full textDomingos, Sara Sofia Cruz. "Comportamento quanto à infiltração bacteriana de um novo cimento biocerâmico em cirurgia endodôntica: um estudo in vitro." Master's thesis, 2015. http://hdl.handle.net/10451/25831.
Full textObjetivos: O objetivo deste estudo é tentar capacitar qual a eficácia de selagem de um novo cimento biocerâmico, o EndoSequence BioCeramic Root-end Repair (BCRR), quanto à infiltração da E. faecalis. Materiais e métodos: Foram realizados dois grupos, o primeiro com 27 dentes e o segundo com 10 dentes. Os dentes foram destartarizados e cortados com um disco de tungsténio em peça de mão reta abaixo da junção amelo-cementária. Posteriormente foram instrumentados com Protaper Universal e foi realizada apicectomia a 3mm do ápex radicular. Seguidamente, os dentes foram isolados com verniz de unhas. Foi realizada a retrobturação com o material em estudo, seguindo as indicações do fabricante, e foi colocado um vedante através do molde com microtubos. Os dentes foram esterilizados em autoclave. Foram de seguida colocados em microtubos, através do modelo de câmara dupla, sendo colocado uma solução estéril na câmara 2 e o inóculo no interior canalar na câmara 1, estando o vedante a separar ambas. Por último, as amostras foram incubadas em estufa durante 20 dias e foram registados os resultados através da alteração da cor do meio na câmara 2. Resultados: Este estudo sugere elevadas percentagens de infiltração do BCRR, sendo estas de 81% no grupo 1 e de 40% no grupo 2. Conclusões: Não são possíveis tirar conclusões definitivas devido às percentagens de infiltração serem díspares em ambos os grupos e devido falta de estudos sobre utilizando este material.
Purpose: The aim of this study is trying to comprehend the effectiveness of the sealing of a new bioceramic, the Endosequence Bioceramic Root-end Repair (BCRR), regarding the leakage of E. faecalis. Materials and methods: Two groups were conducted, the first with 27 teeth and the second with 10 teeth. The teeth were cleaned with an ultrasound and cut with a tungsten disk of a handpiece below the cementoenamel junction. Subsequently they were instrumented with Protaper Universal and an apicoectomy was made 3mm from the root apex. Then the teeth were isolated with nail polish. Retrofilling was done with the material being studied, following the manufacturer's instructions, and a sealant was placed through the mold with microtubes. The teeth were sterilized in an autoclave. Thereafter they were placed into microtubes, in a dual-chamber model, and placed in a sterile solution in chamber 2 and the inoculum canalar inside the chamber 1, with the sealant separating the two chambers. Finally the samples were incubated in the warm house for 20 days and the results were recorded by the change of the color of the solution in chamber 2. Results: This study suggests a high leakege percentages of BCRR, which are 81% in group 1 and 40% in group 2. Conclusions: It is not possible to reach firm conclusions due to leakage percentages because they are distinct in both groups and due to lack of studies using this material.