To see the other types of publications on this topic, follow the link: Dental Leakage Dental Bonding.
Dissertations / Theses on the topic 'Dental Leakage Dental Bonding'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Dental Leakage Dental Bonding.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Capote, Ticiana Sidorenko de Oliveira [UNESP]. "Infiltração marginal em restaurações de resina composta após tratamento dentinário com abrasão a ar e sistemas adesivos." Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/104258.
Full textAbstract:
Made available in DSpace on 2014-06-11T19:33:01Z (GMT). No. of bitstreams: 0
Previous issue date: 2005-02-17Bitstream added on 2014-06-13T21:05:38Z : No. of bitstreams: 1
capote_tso_dr_arafo.pdf: 505094 bytes, checksum: 31fcf59ff0ad841243d74c40158077eb (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A infiltração marginal em restaurações de resina composta classe V foi avaliada nas margens cervical e oclusal de dentes decíduos e permanentes após diferentes tratamentos dentinários. Os preparos cavitários foram confeccionados nas faces vestibular e lingual de 25 molares decíduos e 25 terceiros molares permanentes hígidos utilizando fresas e instrumentos rotatórios e, posteriormente foram divididos em 5 grupos, cada um contendo 10 cavidades: grupo 1 (abrasão a ar e sistema Scotchbond Multi-Uso), grupo 2 (ácido fosfórico e Scotchbond Multi-Uso), grupo 3 (sistema auto-condicionante Clearfil SE Bond), grupo 4 (abrasão a ar, ácido fosfórico e Scotchbond Multi-Uso) e grupo 5 (abrasão a ar e Clearfil SE Bond), todos restaurados com resina Z100. Após polimento, os dentes foram submetidos à termociclagem (500 ciclos) e imersos em solução de nitrato de prata a 50%. Depois de seccionados, foram analisados em lupa estereoscópica (40x) utilizando escores de 0 a 4. Para avaliação dos diferentes tratamentos e tipos de margem, empregou-se o teste de Kruskal-Wallis, seguido de comparações múltiplas dos postos médios pelo teste de Dunn e a comparação entre dentes decíduos e permanentes foi realizada pelo teste de Mann-Whitney, com nível de significância de 5%. A aplicação do sistema de abrasão a ar e Scotchbond Multi-Uso, sem condicionamento ácido produziu os maiores valores de infiltração marginal em dentes decíduos e permanentes. Os resultados demonstraram que a utilização do sistema de abrasão associado a condicionadores ácidos resultou em menor infiltração marginal em dentes decíduos, embora não tenha havido diferença estatisticamente significante. O sistema auto-condicionante promoveu o menor valor de infiltração na margem cervical e o condicionamento com ácido fosfórico acompanhado pelo sistema...
Marginal leakage in gingival and occlusal margins of Class V composite restorations in deciduous and permanent teeth was investigated. Cavities were prepared with burs in high speed in facial and lingual surfaces of 25 deciduous molars and 25 third permanent molars. The specimens were divided into 5 groups of 10 preparations each: group 1 (air abrasion and Scotchbond Multi Purpose), group 2 (phosphoric acid and Scotchbond Multi Purpose), group 3 (Clearfil SE Bond self-etching system), group 4 (air abrasion, phosphoric acid and Scotchbond Multi Purpose) and group 5 (air abrasion and Clearfil SE Bond), all groups were restored with Z100 composite resin. After polish, the teeth were subjected to 500 thermal cycling and immerged in 50% silver nitrate solution. After sectioning, the specimens were analyzed with a stereomicroscope (40x) for assessment of microleakage according to the degree of dye penetration (scores of 0-4). The Kruskal-Wallis test followed by Dunn Multiple Comparison test were performed in order to evaluate the differences among the experimental groups. The Mann-Whitney test was performed to evaluate the differences among deciduous and permanent teeth at a 5% level of significance. Air abrasion and Scotchbond Multi-Purpose without etching, showed the greatest leakage in deciduous and permanent teeth. Air abrasion and acid condicionings produced little leakage in deciduous teeth. The self-etching system demonstrated the least leakage in gingival margins and Scotchbond Multi-Purpose showed the best results in occlusal margins of deciduous teeth. No significant difference was observed among gingival and occlusal margins in deciduous teeth. Air abrasion groups demonstrated the greatest leakage in permanent teeth. Scotchbond Multi- Purpose with phosphoric acid produced the least leakage in permanent teeth, with greater leakage in gingival... (Complete abstract, click electronic address below)
2
Orbegoso, Flores Victor Humberto [UNESP]. "Avaliação in vitro da microinfiltração marginal e análise da fenda marginal cervical através da microscopia eletrônica de varredura, em restaurações de classe V de resina composta. Efeito dos sistemas adesivos e técnica de preparo cavitário." Universidade Estadual Paulista (UNESP), 2001. http://hdl.handle.net/11449/101403.
Full textAbstract:
Made available in DSpace on 2014-06-11T19:31:27Z (GMT). No. of bitstreams: 0
Previous issue date: 2001-05-07Bitstream added on 2014-06-13T19:41:17Z : No. of bitstreams: 1
orbegosoflores_vh_dr_arafo.pdf: 838219 bytes, checksum: 839e8fda83a571e900cce3e586d69abb (MD5)O objetivo deste trabalho foi avaliar a formação de fendas marginais cervicais através da microscopia eletrônica de varredura, assim como, a microinfiltração marginal em preparos de classe V. foram utilizadas duas técnicas de preparo: P1 utilizando fresa carbide no 245 e P2 que utilizou o jato de ar abrasivo Mach 4.0 (80psi de pressão, 27 æm de tamanho de partícula). O tamanho das cavidades foi padronizado com 1,5 mm de profundidade, 2,0 mm de altura e 3,0 mm de largura. Os materiais utilizados foram: G1 -Optibond solo Plus, G2 - Prime & BondNT e G3 - Scotchbond Multiuso Plus (grupo controle), a resina composta Point 4 utilizada para restaurar as cavidades foi padronizada para todas as restaurações. Foram utilizados 42 dentes molares hígidos divididos em 3 grupos de 14 cada, utilizando a face vestibular e lingual sendo que os preparos mostraram a margem oclusal em esmalte e a margem cervical em cemento/dentina. Após as restaurações serem confeccionadas foram armazenadas em água deionizada durante 24 horas, para posteriormente realizar os procedimentos de acabamento e polimento, a seguir os dentes foram isolados com araldite e esmalte para unha e submetidos a testes de ciclagem térmico (400 ciclos)e imediatamente imersos numa solução de nitrato de prata, durante 2 horas, removidos, lavados e colocados numa solução fotoreveladora durante 16 horas. Nessas condições os dentes foram limpos e seccionados no sentido mésio/distal obtendo duas metades as quais por sua vez foram seccionadas no sentido vestíbulo lingual dividindo as restaurações pela metade. Assim, uma metade da restauração foi avaliada através da lupa esteroscópica para observar a microinfiltração e a outra metade preparada e metalizada para ser avaliada através da microscopia eletrônica de varredura. A análise estatística aplicada aos resultados permite concluir que... .
The aim of this study was to evaluate the formation of cervical gap with SEM, and the marginal microleakage in cavities class V. There were used two techniques for the preparations: P1 using a carbide # 245 and P2 using abrasive air Mach 4.0 (80 psi of preasure, 27nm measurement of the particle). The measurements of the cavities were standardized in 1.5mm of deepness, 2,0mm of highness and 3,0mm of lengthiness. The materials used were: G1 Optibond Solo Plus, G2 Prime & Bond NT and G3 Scotchbond Multiuso Plus (control group), it was used the composite Point 4 as the restorative material for all cavities. Forty-two healthy molars, divided in three groups of 14 each one, were used. Cavities were prepared in the buccal and lingual faces, its occlusal margin was in enamel and its cervical margin was in dentin/cement. After that finishing and polishing was made. Teeth were isolated with analdite and nail varnish and thermocycled (400 times). The preparations were dyed with silver nitrate for two hours. Preparations were stored in a photo developing solution for 16 hours. After that time teeth were cleaned and cut (buccal/lingual) Half of the preparation was observed in a stereoscopic microscope and the other half in a SEM. Results: 1.Preparations with abrasive air had a bigger gap; 2.Adhesive systems do not eliminate the formation of gaps; 3.Best results were found in the group prepared with bur and the adhesive Optibond Solo Plus, with a cervical gap 0,84nm, and in the other hand Scotchbond Multiuso Plus showed marginal gaps of 6,36nm; 4.In the occlusal margin Optibond Solo Plus had more microleakage tha Scotchbond Multiuso Plus and Prime & Bond NT.; 5. In the cervical margin, Optibond Solo Plus had good behavior controlling the marginal microleakage, compared with Scotchbond Multiuso Plus and Prime & Bond that had similar leakage between... (Complete abstract, click electronic address below).
3
Capote, Ticiana Sidorenko de Oliveira. "Infiltração marginal em restaurações de resina composta após tratamento dentinário com abrasão a ar e sistemas adesivos /." Araraquara : [s.n.], 2005. http://hdl.handle.net/11449/104258.
Full textAbstract:
Orientador: Angela Cristina Cilense ZuanonBanca: Maria Aparecida de Andrade Moreira
Banca: Maria Cristina Borsatto
Banca: Gelson Luis Adabo
Banca: Josimeri Hebling
Resumo: A infiltração marginal em restaurações de resina composta classe V foi avaliada nas margens cervical e oclusal de dentes decíduos e permanentes após diferentes tratamentos dentinários. Os preparos cavitários foram confeccionados nas faces vestibular e lingual de 25 molares decíduos e 25 terceiros molares permanentes hígidos utilizando fresas e instrumentos rotatórios e, posteriormente foram divididos em 5 grupos, cada um contendo 10 cavidades: grupo 1 (abrasão a ar e sistema Scotchbond Multi-Uso), grupo 2 (ácido fosfórico e Scotchbond Multi-Uso), grupo 3 (sistema auto-condicionante Clearfil SE Bond), grupo 4 (abrasão a ar, ácido fosfórico e Scotchbond Multi-Uso) e grupo 5 (abrasão a ar e Clearfil SE Bond), todos restaurados com resina Z100. Após polimento, os dentes foram submetidos à termociclagem (500 ciclos) e imersos em solução de nitrato de prata a 50%. Depois de seccionados, foram analisados em lupa estereoscópica (40x) utilizando escores de 0 a 4. Para avaliação dos diferentes tratamentos e tipos de margem, empregou-se o teste de Kruskal-Wallis, seguido de comparações múltiplas dos postos médios pelo teste de Dunn e a comparação entre dentes decíduos e permanentes foi realizada pelo teste de Mann-Whitney, com nível de significância de 5%. A aplicação do sistema de abrasão a ar e Scotchbond Multi-Uso, sem condicionamento ácido produziu os maiores valores de infiltração marginal em dentes decíduos e permanentes. Os resultados demonstraram que a utilização do sistema de abrasão associado a condicionadores ácidos resultou em menor infiltração marginal em dentes decíduos, embora não tenha havido diferença estatisticamente significante. O sistema auto-condicionante promoveu o menor valor de infiltração na margem cervical e o condicionamento com ácido fosfórico acompanhado pelo sistema... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Marginal leakage in gingival and occlusal margins of Class V composite restorations in deciduous and permanent teeth was investigated. Cavities were prepared with burs in high speed in facial and lingual surfaces of 25 deciduous molars and 25 third permanent molars. The specimens were divided into 5 groups of 10 preparations each: group 1 (air abrasion and Scotchbond Multi Purpose), group 2 (phosphoric acid and Scotchbond Multi Purpose), group 3 (Clearfil SE Bond self-etching system), group 4 (air abrasion, phosphoric acid and Scotchbond Multi Purpose) and group 5 (air abrasion and Clearfil SE Bond), all groups were restored with Z100 composite resin. After polish, the teeth were subjected to 500 thermal cycling and immerged in 50% silver nitrate solution. After sectioning, the specimens were analyzed with a stereomicroscope (40x) for assessment of microleakage according to the degree of dye penetration (scores of 0-4). The Kruskal-Wallis test followed by Dunn Multiple Comparison test were performed in order to evaluate the differences among the experimental groups. The Mann-Whitney test was performed to evaluate the differences among deciduous and permanent teeth at a 5% level of significance. Air abrasion and Scotchbond Multi-Purpose without etching, showed the greatest leakage in deciduous and permanent teeth. Air abrasion and acid condicionings produced little leakage in deciduous teeth. The self-etching system demonstrated the least leakage in gingival margins and Scotchbond Multi-Purpose showed the best results in occlusal margins of deciduous teeth. No significant difference was observed among gingival and occlusal margins in deciduous teeth. Air abrasion groups demonstrated the greatest leakage in permanent teeth. Scotchbond Multi- Purpose with phosphoric acid produced the least leakage in permanent teeth, with greater leakage in gingival... (Complete abstract, click electronic address below)
Doutor
4
Damé, Josiane Luzia Dias. "Avaliação da influência de métodos de descontaminação após contaminação com sangue em diferentes momentos do processo adesivo." Universidade Federal de Pelotas, 2006. http://repositorio.ufpel.edu.br/handle/ri/2242.
Full textAbstract:
Made available in DSpace on 2014-08-20T14:30:09Z (GMT). No. of bitstreams: 1
Dissertacao_joziane_luzia_dias_dame.pdf: 564053 bytes, checksum: dd7e96465f7bec29457bc90946463293 (MD5)
Previous issue date: 2006-06-23Contamination while restoration procedures are carried out is mentioned in literature as a very frequent event, besides that, there are only a few papers which value this contamination influence in adhesion and possible decontamination methods to be carried out under such an occurrence. So, the aim of this study was to evaluate the influence of decontamination protocols upon dye leakage and push-out bond strength of a dentin adhesive system. It was used a hundred thirty five bovine incisors, which had their labial surface ground to obtain a flat dentine surface where standardized cylindrical cavities were made and they were divided in three groups: A) control without contamination (n = 15); B) contamination prior to the adhesive light activation (Adper Single Bond 2 3M ESPE) (n = 60) and C) contamination after the light activation (n = 60). After the contamination the cavities were divided (n = 15) according to the protocol used: 1) absorbent paper; 2) water; 3) conditioning with phosphoric acid or 4) sodium hypochlorite at 10%. The cavities were restored with the composite (Filtek Z250 3M ESPE), applied to only one increment. After 24 hours the restorations were polished and the specimens were subjected to thermal cycling (500 cycles/5o C a 55oC/30s). The exposure of the stained margins was done through the use of 2% methylene blue dye (pH = 7.0) and digital measurement of the restorations. The specimens cavity floor was ground, exposing the restoration, and they were submitted to the extrusion test (push out) in a universal testing machine. To statistics analysis it was used ANOVA according to two criteria (moment and protocol) and Tukey s test. In the marginal sealing evaluation there was significant statistics in the moment factor (p<0.001) and also in the interaction moment x protocol (p<0.008). The percentage average of stained margins found after light activation was statistically higher than the ones found prior to the light activation (p<0.001). In group B the conditioning protocol showed a percentage average of stained margins statistically higher than the water group (p<0.003), and the paper and hypochlorite groups demonstrated intermediate values. Comparing to group C protocols, it was not detected significant differences. Relating to the extrusion resistance, only the moment factor was statistically significant (p<0.001), while group B values were statistically higher (p<0.05) than the group C ones (5.32+3.03 and 3.4+1.92 MPa respectively). All protocols demonstrated resistance values similar to the control values. Higher resistance values were related to lower values of stained margins. It was concluded that blood contamination after light activation of the adhesive system had an adverse effect in the sealing ability of composite restorations and the different decontamination protocols generally produced similar results
A contaminação durante a realização de procedimentos restauradores é citada na literatura como um evento muito freqüente, apesar disso, poucos são os trabalhos que avaliam a influência desta contaminação na adesão e possíveis métodos de descontaminação a serem realizados frente a sua ocorrência. Assim, este trabalho teve como objetivo avaliar a influência dos métodos de descontaminação no selamento marginal e na resistência à extrusão de um sistema adesivo dentinário. Foram utilizados 135 incisivos bovinos, que tiveram a face vestibular desgastada expondo-se dentina, onde foram confeccionadas cavidades circulares padronizadas. Estas foram distribuídas em três grupos: A) controle, sem contaminação (n = 15); B) contaminação previamente à fotoativação do adesivo (Adper Single Bond 2 - 3M ESPE) (n = 60) e C) contaminação após a fotoativação (n = 60). Após a contaminação as cavidades foram divididas (n = 15) de acordo com o método utilizado: 1) papel absorvente; 2) água; 3) condicionamento com ácido fosfórico ou 4) hipoclorito de sódio a 10%. As cavidades foram restauradas com o compósito (Filtek Z250 - 3M ESPE), aplicando-se um único incremento. Após 24h as restaurações foram polidas e os espécimes submetidos à ciclagem térmica (500 ciclos/5°C a 55°C/30s). O selamento marginal foi avaliado utilizando-se o corante azul de metileno a 2% (pH = 7,0) seguido da digitalização das restaurações. Os espécimes foram desgastados pela face lingual expondo a restauração, e submetidos ao ensaio de extrusão (push out) em uma máquina de ensaios mecânicos. Para a análise estatística foram utilizados ANOVA segundo dois critérios (momento x método) e Teste de Tukey. Na avaliação do selamento marginal houve significância estatística para o fator momento (p<0,001) e também para interação momento X método (p=0,008). O nível médio de margens coradas encontradas após a fotoativação foi estatisticamente superior ao encontrado previamente a fotoativação (p<0,001). Dentro do Grupo B o método condicionamento demonstrou uma média de margens coradas estatisticamente superior ao grupo água (p<0,003), e os grupos papel e hipoclorito demonstraram valores intermediários. Para as comparações entre métodos dentro do Grupo C não foram detectadas diferenças significativas. Em relação à resistência à extrusão, apenas o fator momento demonstrou ser estatisticamente significante (p<0,001), sendo os valores do Grupo B estatisticamente superiores (p<0,05) aos do Grupo C (5,32±3,03 e 3,4±1,92 MPa respectivamente). Todos os métodos demonstraram valores de resistência similares ao controle. Maiores valores de resistência foram relacionados a menores valores de margens coradas. Concluiu-se que a contaminação com sangue após a fotoativação do sistema adesivo teve um efeito adverso na capacidade de selamento de restaurações de compósito e os diferentes métodos de descontaminação geralmente produziram resultados similares
5
Orbegoso, Flores Victor Humberto. "Avaliação "in vitro" da microinfiltração marginal e análise da fenda marginal cervical através da microscopia eletrônica de varredura, em restaurações de classe V de resina composta. Efeito dos sistemas adesivos e técnica de preparo cavitário /." Araraquara : [s.n.], 2001. http://hdl.handle.net/11449/101403.
Full textAbstract:
Orientador: Marcelo Ferrarezi de AndradeBanca: Marcos Ribeiro Moysés
Banca: Alberto Magno Gonçalves
Banca: Sillas Luiz Lordelo Duarte Júnior
Banca: Sizenando de Toledo Porto Neto
Resumo: O objetivo deste trabalho foi avaliar a formação de fendas marginais cervicais através da microscopia eletrônica de varredura, assim como, a microinfiltração marginal em preparos de classe V. foram utilizadas duas técnicas de preparo: P1 utilizando fresa carbide no 245 e P2 que utilizou o jato de ar abrasivo Mach 4.0 (80psi de pressão, 27 æm de tamanho de partícula). O tamanho das cavidades foi padronizado com 1,5 mm de profundidade, 2,0 mm de altura e 3,0 mm de largura. Os materiais utilizados foram: G1 -Optibond solo Plus, G2 - Prime & BondNT e G3 - Scotchbond Multiuso Plus (grupo controle), a resina composta Point 4 utilizada para restaurar as cavidades foi padronizada para todas as restaurações. Foram utilizados 42 dentes molares hígidos divididos em 3 grupos de 14 cada, utilizando a face vestibular e lingual sendo que os preparos mostraram a margem oclusal em esmalte e a margem cervical em cemento/dentina. Após as restaurações serem confeccionadas foram armazenadas em água deionizada durante 24 horas, para posteriormente realizar os procedimentos de acabamento e polimento, a seguir os dentes foram isolados com araldite e esmalte para unha e submetidos a testes de ciclagem térmico (400 ciclos)e imediatamente imersos numa solução de nitrato de prata, durante 2 horas, removidos, lavados e colocados numa solução fotoreveladora durante 16 horas. Nessas condições os dentes foram limpos e seccionados no sentido mésio/distal obtendo duas metades as quais por sua vez foram seccionadas no sentido vestíbulo lingual dividindo as restaurações pela metade. Assim, uma metade da restauração foi avaliada através da lupa esteroscópica para observar a microinfiltração e a outra metade preparada e metalizada para ser avaliada através da microscopia eletrônica de varredura. A análise estatística aplicada aos resultados permite concluir que... (Resumo completo, clicar acesso eletrônico abaixo).
Abstract: The aim of this study was to evaluate the formation of cervical gap with SEM, and the marginal microleakage in cavities class V. There were used two techniques for the preparations: P1 using a carbide # 245 and P2 using abrasive air Mach 4.0 (80 psi of preasure, 27nm measurement of the particle). The measurements of the cavities were standardized in 1.5mm of deepness, 2,0mm of highness and 3,0mm of lengthiness. The materials used were: G1 Optibond Solo Plus, G2 Prime & Bond NT and G3 Scotchbond Multiuso Plus (control group), it was used the composite Point 4 as the restorative material for all cavities. Forty-two healthy molars, divided in three groups of 14 each one, were used. Cavities were prepared in the buccal and lingual faces, its occlusal margin was in enamel and its cervical margin was in dentin/cement. After that finishing and polishing was made. Teeth were isolated with analdite and nail varnish and thermocycled (400 times). The preparations were dyed with "silver nitrate" for two hours. Preparations were stored in a photo developing solution for 16 hours. After that time teeth were cleaned and cut (buccal/lingual) Half of the preparation was observed in a stereoscopic microscope and the other half in a SEM. Results: 1.Preparations with abrasive air had a bigger gap; 2.Adhesive systems do not eliminate the formation of gaps; 3.Best results were found in the group prepared with bur and the adhesive Optibond Solo Plus, with a cervical gap 0,84nm, and in the other hand Scotchbond Multiuso Plus showed marginal gaps of 6,36nm; 4.In the occlusal margin Optibond Solo Plus had more microleakage tha Scotchbond Multiuso Plus and Prime & Bond NT.; 5. In the cervical margin, Optibond Solo Plus had good behavior controlling the marginal microleakage, compared with Scotchbond Multiuso Plus and Prime & Bond that had similar leakage between... (Complete abstract, click electronic address below).
Doutor
6
Sánchez-ayala, Alfonso. "AVALIAÇÃO DA INFLUÊNCIA DA CICLAGEM TÉRMICA E MECÂNICA NA EFETIVIDADE DA INTERFACE ADESIVA." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2008. http://tede2.uepg.br/jspui/handle/prefix/1695.
Full textAbstract:
Made available in DSpace on 2017-07-24T19:21:56Z (GMT). No. of bitstreams: 1
Alfonso Sanchez-Ayala.pdf: 4109673 bytes, checksum: f08284c2e1c48354c9d9e417e1b9484e (MD5)
Previous issue date: 2008-01-31The aim of this study was to evaluate in vitro the adhesive effectiveness in class V cavities using four different adhesive systems, being submit to thermocycling and occlusal load cycling. The cavities had a dimension of 3x2x1.8 mm3 and were made on amelo-cement junction on buccal and lingual of 80 human premolars (n=160). The used adhesive systems were Adper Single Bond 2, AdheSE, Adper Prompt LPop and One Coat 7.0. The used composite was Synergy® D6. The adhesive and photopolymerization (600 mW/cm2) proceedings were made conventionally and following the manufacturer recommendations. The specimens were divided in 4 groups (n=40) according to adhesive system used. Each group was divided in 4 subgroups (n=10) according to applycated stress (thermocycling, occlusal load cycling and thermocycling+occlusal load cycling). Each subgroup included 1 control group without stressing. The thermocycling was made using 500 cycles, with 5-55 C, dwell time of 15 seg and transfer time of 5 seg. The occlusal load cycling was made applying a force of 40-70 N during 50000 cycles with 2 Hz of frequency. Later, the specimens were impermeabilited and immersed in tracer agent of 50 % silver nitrate solution by 2 hours. Finally, the specimens were prepared for adhesive effectiveness evaluation through optic microscopy 40X (marginal microleakage occurrence) and scanning electronic microscopy 1000X (gaps formation). The tracer agent microleakage was measured qualitative (score) and quantitatively . The gap width was measured on 3 points of center of axial wall. The Kruskal-Wallis and post-hoc de Dunn, and ANOVA two-way and post-hoc Bonferroni tests were used on statistic analysis. Despite of few differences found in used adhesive system performance, the tendency could be observed to the increase of the marginal microleakage in the submitted groups specifically to thermocycling. On the other hand, the axial gaps formation presented progressively higher width in the submitted groups to thermocycling, occlusal load cycling and thermocycling+occlusal load cycling. It was concluded that the used adhesive system presented similar adhesive effectiveness when were submitted to thermal and mechanical stress.
A proposição deste estudo foi avaliar in vitro a efetividade adesiva em cavidades de classe V utilizando quatro diferentes sistemas adesivos, sendo submetidas a termociclagem e carga cíclica oclusal. As cavidades tiveram uma dimensão de 3x2x1.8 mm3 e foram realizadas na união amelo-cementária em vestibular e lingual de 80 pré-molares humanos (n=160). Os sistemas adesivos empregados foram Adper Single Bond 2, AdheSE, Adper Prompt L-Pop e One Coat 7.0. A resina composta utilizada foi Synergy D6. Os procedimentos de adesão e fotopolomerização (600 mW/cm2) foram realizados convencionalmente e seguindo as recomendações do fabricante. Os espécimes foram divididos em 4 grupos (n=40) segundo o tipo sistema adesivo utilizado. Cada grupo foi dividido em 4 subgrupos (n=10) segundo o tipo de estresse aplicado (termociclagem, carga cíclica oclusal e termociclagem+carga cíclica oclusal). Cada subgrupo incluiu 1 grupo controle sem estresse. A termociclagem foi realizada utilizando 500 ciclos a 5-55 C, 15 seg de tempo de permanência em cada temperatura e 5 seg de tempo de transferência. A carga cíclica oclusal foi realizada aplicando uma força de 40-70 N durante 50000 ciclos com freqüência de 2 Hz. Posteriormente, os espécimes foram impermeabilizados e imersos em agente traçador de solução a 50 de nitrato de prata por 2 horas. Finalmente, os espécimes foram preparados para a avaliação da efetividade adesiva por meio de microscopia óptica 40X (ocorrência de microinfiltração marginal) e microscopia eletrônica de varredura 1000x (formação de fendas). A microinfiltração do agente traçador foi mensurada qualitativa (escore) e quantitativamente . A largura das fendas foi medida (μm) em 3 pontos do centro da parede axial. Os testes de Kruskal-Wallis e post-hoc de Dunn, e ANOVA two-way e post-hoc Bonferroni foram utilizados na análise estatística. Apesar das poucas diferenças significativas encontradas no desempenho dos sistemas adesivos utilizados, pôde-se observar a tendência ao aumento da microinfiltração marginal nos grupos submetidos especificamente a termociclagem. Por outro lado, a formação de fendas axiais apresentaram progressivamente maior largura nos grupos submetidos a termociclagem, carga cíclica e termociclagem+carga cíclica. Concluise que os sistemas adesivos avaliados apresentaram efetividade adesiva similar quando foram submetidos a estresse térmico e mecânico.
7
Guimarães, Murilo de Sousa [UNESP]. "Reparabilidadede um cimento ionomérico aderido ao esmalte com sistemas adesivos autocondicionantes." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/104278.
Full textAbstract:
Made available in DSpace on 2014-06-11T19:33:01Z (GMT). No. of bitstreams: 0
Previous issue date: 2009-02-16Bitstream added on 2014-06-13T20:24:35Z : No. of bitstreams: 1
guimaraes_ms_dr_arafo.pdf: 1443329 bytes, checksum: 2d3d8b079af9426aadd16dd726576433 (MD5)O objetivo deste trabalho, dividido em três estudos, foi investigar (1) a reparabilidade de um cimento de ionômero de vidro modificado por resina, (2) o efeito cariostático e (3) a retenção de selantes ionoméricos aderidos ao esmalte não desgastado com sistemas adesivos autocondicionantes simplificados. Materiais e Métodos: Para o estudo 1 foram confeccionados 60 espécimes de cada material, Vitremer (VT) e resina Z250 (RC). Após envelhecimento químico e térmico, eles foram divididos em 3 grupos de acordo com o tratamento mecânico da superfície: ponta diamantada em alta rotação, ponta em ultra-som e sem desgaste. Cada espécime foi reparado com o mesmo material utilizado inicialmente. Aplicou-se na superfície do VT o Vitremer Primer (VP), e para a resina, utilizou-se ácido fosfórico seguido de adesivo Single Bond. Os espécimes foram isolados deixando exposta a interface de união. Após novo envelhecimento, os mesmos foram impregnados por nitrato de prata, seccionados e avaliados quanto à infiltração e formação de fendas. Os dados foram analisados pelos testes de Kruskal-Wallis e Mann-Whitney (α=0,05). No segundo estudo 64 incisivos bovinos foram distribuídos em 4 grupos segundo o tratamento da superfície de esmalte: VP, Prompt L-Pop (Pr), Xeno III (Xe) ou sem tratamento. Um cilindro de VT foi construído em metade dos dentes, enquanto que a RC foi utilizada na outra metade. Os corpos de prova foram 19 submetidos a desafio cariogênico e seccionados, para realização de testes de dureza em três regiões: externa, união e interna, até a profundidade de 300 μm. Os dados transformados em porcentagem de perda mineral foram analisados pelo teste de ANOVA complementado pelo teste de Tukey ao nível de significância de 5%. No terceiro estudo, 20 pares de molares permanentes hígidos foram selecionados de crianças entre 6 e 10 anos. Em um dos dentes foi aplicado...
The purpose of this work, divided into three studies, was to investigate (1) the reparability of a resin-modified glass-ionomer cement, as well as (2) the cariostatic effect and (3) retention of glass-ionomer sealants bonded to enamel with one-step self-etching adhesive systems. Materials and Methods: For the first study, 60 specimens were prepared with Vitremer (VT) and Z250 resin. After chemical and thermal aging, the specimens were divided into 3 groups according to the mechanical treatment of the surface: diamond bur, ultrasound coupled bur or no treatment. Each specimen was repaired with the original restorative material. For VT repairs, Vitremer Primer (VP) was first applied while for composite resin the surface was phosphoric acid etched followed by the application of Single Bond. The specimens were coated with acid resistant varnish except for 1 mm around de interface. After additional aging, the specimens were impregnated by silver nitrate and sectioned medialy for the evaluation of silver infiltration and gap formation in SEM. Data were submitted to Kruskal-Wallis and Mann-Whitney tests (α=0.05). In the second study, 64 bovine teeth were randomly assigned to 4 groups according to the enamel surface treatment: VP, Prompt L-Pop (Pr), Xeno III (Xe) or no treatment. A cylinder of VT was built up in half of the teeth while a composite resin was used in the other half. The teeth were then submitted to a cariogenic challenge after which they 23 were medialy cut. Transversal hardeness evaluation was performed in three regions, external, interface and internal, up to the depth of 300μm. Hardness numbers were converted to percentage of mineral loss and the data were submitted to ANOVA and Tukey tests at the level of significance of 5%. For the third study, 20 pairs of sound permanent molars were selected from children between 6 and 10 years of age. One tooth of the pair received... (Complete abstract click electronic access below)
8
Siqueira, Fabiana Suelen Figueredo de. "ALTERNATIVAS PARA MELHORAR AS PROPRIEDADES ADESIVAS DE SISTEMAS ADESIVOS UNIVERSAIS EM DENTINA EROSIONADA." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2017. http://tede2.uepg.br/jspui/handle/prefix/1729.
Full textAbstract:
Made available in DSpace on 2017-07-24T19:22:05Z (GMT). No. of bitstreams: 1
FABIANA SIQUEIRA.pdf: 4384235 bytes, checksum: 655ceab1a73a43f410cdb4b5e3773475 (MD5)
Previous issue date: 2017-04-07Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
The aim of the present study was evaluate the adhesive properties of eroded dentin with different pH cycling using universal adhesive systems and to evaluate the application of collagen cross-linking agent or MMP inhibitors on the resin-eroded dentin interface, through of three in vitro studies. For the experiment 1, the teeth were randomly assigned into the experimental groups according to the combination of variables: dentin surface (sound dentin and eroded dentin) vs adhesive systems (10 universal adhesives) vs Adhesive strategy [etch-and-rinse (ER) and self-etch (SE)]. The adhesive systems were applied according to the manufacturer's instructions and the teeth were restored. They were sectioned to analysis of microtensile bond strength (μTBS) and nanoleakage (NL). The surfaces of 2 tooth were examined under scanning electron microscopy (SEM) to evaluate the surface characterization after erosive-cycling. For experiment 2, the teeth were randomly assigned into 18 experimental conditions according to the variables: Erosive cycling (eroded dentin with soft drink pH ≈ 2,7 and eroded dentin with citric acid pH 2.3) vs. adhesive systems [Prime & Bond Elect (PBE); Scotchbond Universal Adhesive (SBU); Tetric N-Bond Universal (TEU)] vs Treatment agents [6.5% primer containing proanthocyanidin (PA) and 0.1% riboflavin (RI)]. The surface was treated with primers and the adhesive systems were applied and restored. The samples were sectioned and tested for μTBS, NL and degree of conversion (DC). The surfaces of 2 tooth were examined under SEM to evaluate the surface characterization after erosive-cycling. For experiment 3, the teeth were randomly assigned into 18 experimental conditions according to the variables: Erosive cycling (eroded dentin with soft drink pH ≈ 2,7 and eroded eroded with citric acid pH 2.3) vs. Adhesive Systems (PBE; SBU; TEU) vs Acid pretreatment [control with 37% phosphoric acid;Phosphoric acid containing 2% chlorhexidine (CHXacid) and phosphoric acid containing 3% PA (PAacid)]. The teeth were acid-etched according to each experimental conditions, the adhesive systems were applied and the teeth were restored. The teeth were sectioned and tested for μTBS, NL and DC. Data were submitted to appropriate statistical analysis (α = 0.05). The μTBS values in eroded dentin were statistically lower than sound dentin, independent of the adhesive strategy (p < 0.01) The inclusion of primers containing collagen cross-linking agents in the eroded dentin adhesive protocol improved μTBS values (p <0.001),significantly reduced NL (p <0.004) for all the adhesives tested, as well as improved DC (p <0.03). The use of phosphoric acids containing MMPs inhibitors or collagen cross-linking agent improved μTBS values (p> 0.33), produced a significant reduction of NL (p <0.004) and improved DC (p <0.03). The application of MMP inhibitors (primer or acid etching - containing) were effective to improve the properties of the resin-eroded dentin interface.
O objetivo desse estudo foi avaliar as propriedades adesivas à dentina erosionada utilizando sistemas adesivos universais e verificar o efeito da aplicação de agentes reticuladores de colágeno ou inibidores de Metaloproteinases (MMPs) na interface resina-dentina erosionada, através de três estudos laboratoriais. Para o experimento 1, os dentes foram distribuídos aleatoriamente entre os grupos experimentais de acordo com a combinação das variáveis: superfície dentinária (controle sem erosão e erosionada) vs. sistemas adesivos (10 sistemas adesivos universais) vs.estratégia adesiva [condicionamento convencional (ER) e autocondicionante (SE)].Os sistemas adesivos foram aplicados de acordo com as especificações do fabricante e os dentes foram restaurados. Depois foram seccionados para análise da resistência de união à dentina (μTBS) e nanoinfiltração (NI). A superfície de 2 dentes foi examinada sob microscopia eletrônica de varredura (MEV) para avaliar as características da superfície após ciclagem erosiva. Para o experimento 2, os dentes foram aleatoriamente alocados em 18 condições experimentais de acordo com as variáveis: Ciclagem erosiva (dentina erosionada com coca-cola pH ≈ 2,7 e dentina erosionada com ácido cítrico pH 2,3) vs. Sistemas adesivos [Prime & Bond Elect (PBE), Scotchbond Universal Adhesive (SBU) e Tetric N-Bond Universal (TEU)] vs. Agentes de tratamento [primer contendo 6,5% de roantocianidina (PA) e primer contendo 0,1% de riboflavina (RI)]. Os sistemas adesivos foram aplicados de acordo com as especificações do fabricante após aplicação do primer e restaurados. A seguir, os dentes foram seccionados e testados para análise da μTBS, NI e grau de conversão (GC). A superfície de 2 dentes foi examinada sob MEV para avaliar as características da superfície após erosão. Para o experimento 3, os dentes foram alocados aleatoriamente dentro de 18 condições experimentais de acordo com as variáveis: Ciclagem erosiva (dentina erosionada com coca-cola pH ≈ 2,7 e dentina erosionada com ácido cítrico pH 2,3) vs. Sistemas adesivos (PBE, SBU e TEU) vs. pré-tratamento ácido [controle com ácido fosfórico 37%; Ácido fosfórico contendo 2% de clorexidina (CHXacido) e ácido fosfórico contendo 3% de PA (PAacido)]. Os dentes foram condicionados de acordo com cada grupo experimental, os sistemas adesivos foram aplicados e restaurados com resina composta. Posteriormente, os dentes foram seccionados e testados para análise da μTBS, NI e GC. Todos os dados foram submetidos a ANOVA 3 fatores e teste de Tukey (α = 0,05). Os valores de μTBS em dentina erosionada foi estatisticamente inferior à dentina sadia,independente da estratégia adesiva (p > 0,61). A inclusão de primers contendo agentes reticuladores de colágeno no protocolo adesivo a dentina erosionada,melhorou os valores de μTBS (p < 0,001), diminuiu significativamente a NI (p <0,004) para os adesivos testados, além de melhorar o GC (p < 0,03). A utilização de ácidos fosfórico contendo inibidores de MMPs ou agentes reticuladores de colágeno melhorou os valores de μTBS (p > 0,33), produziu uma redução significativa da NI (p < 0,004) e melhorou o GC (p < 0,03). Os agentes reticuladores independente do veículo (primer ou condicionamento ácido) foram eficazes para melhorar as propriedades da interface resina-dentina erosionada.
9
Guimarães, Murilo de Sousa. "Reparabilidadede um cimento ionomérico aderido ao esmalte com sistemas adesivos autocondicionantes /." Araraquara : [s.n.], 2009. http://hdl.handle.net/11449/104278.
Full textAbstract:
Orientador: Josimeri HeblingBanca: Elisa Aparecida Maria Giro
Banca: Angela Cristina Cilense Zuanon
Banca: Célia Regina Moreira Lanza
Banca: Darlon Martins Lima
Resumo: O objetivo deste trabalho, dividido em três estudos, foi investigar (1) a reparabilidade de um cimento de ionômero de vidro modificado por resina, (2) o efeito cariostático e (3) a retenção de selantes ionoméricos aderidos ao esmalte não desgastado com sistemas adesivos autocondicionantes simplificados. Materiais e Métodos: Para o estudo 1 foram confeccionados 60 espécimes de cada material, Vitremer (VT) e resina Z250 (RC). Após envelhecimento químico e térmico, eles foram divididos em 3 grupos de acordo com o tratamento mecânico da superfície: ponta diamantada em alta rotação, ponta em ultra-som e sem desgaste. Cada espécime foi reparado com o mesmo material utilizado inicialmente. Aplicou-se na superfície do VT o Vitremer Primer (VP), e para a resina, utilizou-se ácido fosfórico seguido de adesivo Single Bond. Os espécimes foram isolados deixando exposta a interface de união. Após novo envelhecimento, os mesmos foram impregnados por nitrato de prata, seccionados e avaliados quanto à infiltração e formação de fendas. Os dados foram analisados pelos testes de Kruskal-Wallis e Mann-Whitney (α=0,05). No segundo estudo 64 incisivos bovinos foram distribuídos em 4 grupos segundo o tratamento da superfície de esmalte: VP, Prompt L-Pop (Pr), Xeno III (Xe) ou sem tratamento. Um cilindro de VT foi construído em metade dos dentes, enquanto que a RC foi utilizada na outra metade. Os corpos de prova foram 19 submetidos a desafio cariogênico e seccionados, para realização de testes de dureza em três regiões: externa, união e interna, até a profundidade de 300 μm. Os dados transformados em porcentagem de perda mineral foram analisados pelo teste de ANOVA complementado pelo teste de Tukey ao nível de significância de 5%. No terceiro estudo, 20 pares de molares permanentes hígidos foram selecionados de crianças entre 6 e 10 anos. Em um dos dentes foi aplicado... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The purpose of this work, divided into three studies, was to investigate (1) the reparability of a resin-modified glass-ionomer cement, as well as (2) the cariostatic effect and (3) retention of glass-ionomer sealants bonded to enamel with one-step self-etching adhesive systems. Materials and Methods: For the first study, 60 specimens were prepared with Vitremer (VT) and Z250 resin. After chemical and thermal aging, the specimens were divided into 3 groups according to the mechanical treatment of the surface: diamond bur, ultrasound coupled bur or no treatment. Each specimen was repaired with the original restorative material. For VT repairs, Vitremer Primer (VP) was first applied while for composite resin the surface was phosphoric acid etched followed by the application of Single Bond. The specimens were coated with acid resistant varnish except for 1 mm around de interface. After additional aging, the specimens were impregnated by silver nitrate and sectioned medialy for the evaluation of silver infiltration and gap formation in SEM. Data were submitted to Kruskal-Wallis and Mann-Whitney tests (α=0.05). In the second study, 64 bovine teeth were randomly assigned to 4 groups according to the enamel surface treatment: VP, Prompt L-Pop (Pr), Xeno III (Xe) or no treatment. A cylinder of VT was built up in half of the teeth while a composite resin was used in the other half. The teeth were then submitted to a cariogenic challenge after which they 23 were medialy cut. Transversal hardeness evaluation was performed in three regions, external, interface and internal, up to the depth of 300μm. Hardness numbers were converted to percentage of mineral loss and the data were submitted to ANOVA and Tukey tests at the level of significance of 5%. For the third study, 20 pairs of sound permanent molars were selected from children between 6 and 10 years of age. One tooth of the pair received... (Complete abstract click electronic access below)
Doutor
10
Rix, Douglas. "Bond strengths and fluoride release of modified glass ionomer and resin adhesives." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ39873.pdf.
Full text
11
Hung, Cheung-sing Tony. "Bonding of dental alloys to enamel." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/HKUTO/record/B39558150.
Full text
12
孔祥陞 and Cheung-sing Tony Hung. "Bonding of dental alloys to enamel." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B39558150.
Full text
13
Torstenson, Bodil. "Contraction gaps around dental composite resin restorations." Stockholm : Kongl. Carolinska Medico Chirurgiska Institutet, 1988. http://books.google.com/books?id=_vNpAAAAMAAJ.
Full text
14
Dhanpal, Prashanth Kumar. "Water sorption and resin hydrophilicity of dentin bonding agents." Thesis, Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B39839503.
Full text
15
Minchau, Jeffrey G. "Coronal microleakage of a dentin bonding agent when used in the presence of a eugenol containing endodontic sealer." Morgantown, W. Va. : [West Virginia University Libraries], 2004. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3349.
Full textAbstract:
Thesis (M.S.)--West Virginia University, 2004.Title from document title page. Document formatted into pages; contains x, 91 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 66-71).
16
Du, Bois Alexander Hermann. "Dentine permeability and cytotoxicity of a dentine bonding agent." Thesis, University of the Western Cape, 2006. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_3955_1254296704.
Full textAbstract:
The objectives of this study were to create an in vitro situation which closest resembled the clinical situation by inclusion of human dentine discs at a specified anatomic location as barrier and evaluating if comparable or graded perfusion could be identified as well as whether a link existed between dentine thickness and permeability. The other leg of the study was to evaluate the cytotoxicity of Xeno III, one of the newly released new generation dentine bonding agents and to evaluate its cytotoxicity in an in vitro pulp chamber device, determining which thickness of dentine would be able to protect the dental pulp from noxious substances in the bonding agent.
17
Tanna, Nihar D. "A comparison of demineralization between self etching primer and conventional sealant an in vitro study /." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=2823.
Full textAbstract:
Thesis (M.S.)--West Virginia University, 2003.Title from document title page. Document formatted into pages; contains ix, 107 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 76-83).
18
Ghiz, Matthew A. "Effects of sealant and self etching primer on enamel decalcification in vivo." Morgantown, W. Va. : [West Virginia University Libraries], 2004. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=46.
Full textAbstract:
Thesis (M.S.)--West Virginia University, 2004.Title from document title page. Document formatted into pages; contains viii, 113 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 66-81).
19
Attathom, Tipapat Armstrong Steven R. "Effect of ethanol-wet bonding to caries affected dentin." Iowa City : University of Iowa, 2009. http://ir.uiowa.edu/etd/278.
Full text
20
Gale, Martin Stuart. "Dental filled resin restorations seal integrity of the dentine bond /." Thesis, Click to view the E-thesis via HKUTO, 1996. http://sunzi.lib.hku.hk/hkuto/record/B36544358.
Full text
21
Moosa, Rustim. "The effect of dentine-bonding agents on the microleakage of provisional crowns." Thesis, University of the Western Cape, 2005. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_9061_1181559915.
Full textAbstract:
The use of provisional acrylic crowns is common practice with prosthodontic treatment. Provisional crowns are prone to marginal leakage and poor retention due to weak interim cements. The aim of this study was to assess the effect of the application of two different dentine-bonding agents on the microleakage of provisional crowns.
22
Kantorowitz, Zvi. "The feasibility of bonding orthodontic brackets to laser treated enamel surfaces." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0012/MQ32148.pdf.
Full text
23
Signorelli, Michael D. "A comparison of bond strength between an orthodontic adhesive resin cured with halogen light or plasma arc light an in vitro and in vivo study /." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=2815.
Full textAbstract:
Thesis (M.S.)--West Virginia University, 2003.Title from document title page. Document formatted into pages; contains viii, 107 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 66-71).
24
Padipatvuthikul, Pavinee. "Fatigue studies on dental composites and bonding systems." Thesis, University of Liverpool, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.485845.
Full textAbstract:
Introduction: Adhesion has become an important concept in modern restorative dentistry. It offers the ability to bond materials to the tooth without invasive tooth preparation. Numerous in-vitro strength tests have been used to determine the bond strength of adhesive systems. However, because the occlusal forces applied to. a restoration are complex, and made up of a combination of forces, no one test can satisfactorily predict the in-vivo behavior of an adhesive system. The majority of bond strength studies have used monotonic tests to assess the bond strength of materials and between the materials and the tooth. These tests are expedient, but do not simulate the cyclic forces that operate in the mouth. Tests that characterize this type of . stress are called fatigue tests. Fatigue can result in wear and fracture of materials or bonds. .Objectives: To investigate fatigue behavior of modern resin composites and resinbonded joints of both metal to enamel and ceramic to enamel. The main approaches to fatigue assessment, 'Fatigue Limit' and 'Fatigue Life'were compared Materials and Methods: Surface effects of fatigue One hundred and eighty samples of two historical composites1-2 and seven modern composites3 - 9 were subjected to 2000 stress cycles between 0 and 120N or 0 and 400N. Surface damage was measured as the diameter of the fatigue scar and subsurface damage was determined by silver nitrate staining. The hardness of both the surface and subsurface was also determined. Fracture Composite to composite Two hundred and twenty composite disks were fabricated using three materials.7 • 9 After one day, one week, four weeks, and twelve weeks, fifty-five specimens of each material were removed from' water and divided into three groups of fifteen and one group of ten. Each group of samples was treated with one of three bonding systems10- 12 before adding a sec~nd increment. For each material, ten samples were subjected to Shear test in a Universal Testing Machine13 (CHS= 50 mmlmin). The fatigue limit test using fifteen samples per group were used to determine the fatigue limit using the staircase method (Draughn 1979). Metal or Ceramic to Enamel (via resin) Three hundred and forty-two discs of Ni/Cr-alloy14 were cast and treated by either sandblasting with aluminium oxide, or by sandblasting followed by electrolytic-etching in HCI. The disks were bonded to etched enamel with one of three dental bonding systems.1S - 17 One hundred and seventy-one ceramic disks were fabricated by sintering ceramic powder.18 One surface of each disk was etched with porcelain etching-gel19 for fifteen minutes and sandblasted with 50 J.Im A120 3. The prepared disks were then divided into three groups and were bonded to etched enamel using one of three dental bonding systems.1S - 17 Ten specimens of each group were sUbjected to a shear bond test (CHS 50 mm/min) and seventeen specimens of each group to a staircase fatigue test to determine the fatigue limit of the bonds. The remaining specimens from each group were placed in the custom made fatigue testing machine and allowed to cycle to failure between 0-20 kg, 0-10 kg or 0-5 kg (n=10 per load). The number of cycles at failure was analysed by Weibull statistics to determine the fatigue life Results: The surface studies in composites indicated that both surface and subsurface damage increased with increasing load. In general, small-particle composites experienced less damage than the large particle materials. At 12 kg, the surface damage was inversely proportional to the surface hardness, whereas at 40 kg, it was proportional to the subsurface hardness. At both loads, subsurface damage was directly proportion to subsurface hardness. For the composite to composite bonds, the fatigue limit values were approximately 30% of the shear bond strength values and the values were significantly different (p<0.01) for all nine groups. For metal to enamel bonds, the fatigue limit (after 5000 cycles) varied between 10.7 and 16.8 MPa compared to 21.3 and 48 MPa for the shear strength. The values for all groups was significantly different (p<0.001). There was no significant correlation between the shear bond strength and the fatigue limit values (Pearson Correlation P<0.01). For all groups, the threshold stress at which the samples equid withstand over one million cycles (fatigue Life) was 2.5 MPa. For ceramic to enamel bonds, the fatigue limit (after 5000 cycles) varied between 11.41 and 13.74 MPa compared to 21.3 and 48 MPa for the shear strength. The values for all groups were significantly differ~nt (p<0.001). There was no significa~t correlation between the shear bond strength and the fatigue limit values (Pearson Correlation P<0.001). For all groups, the threshold stress at which the samples could withstand over one million cycles (fatigue Life) was 2.5 MPa. Conclusion: Fatigue damage to the surface and subsurface of composite was related to the hardness of the material. The values of the fatigue limit were significantly lower than the shear bond strength values. There was no correlation between fatigue limit and shear bond strength. The long term safety limit for resin bonded joints to enamel is 2.5 MPa. Neither the shear test, nor the fatigue limit test was an accurate predictor of the long-term fatigue behaviour of resin-bonded restorations. A fatigue limit test using 100,000 cycles may be a useful predictor of the fatigue life which, in these studies, was half of the fatigue limit at 100, 000 cycles but the only reliable test is to test to failure. The data presented in this thesis indicated that the shear bond strength is not pred!ctor of long term failure. lClearfil Posterior, Cavex. Holland. 20cclusin. ICI. UK. 3Concise, 3M. USA. 4Admira, VOCO, Germany. 5Grandio. VOCO. Germany. 6Grandio Flow, VOCO, Germany. 7Spectrum, Dentsply, Germany. 8Durafill VS, Heraeus Kulzer, Germany. 9Herculite XRV, Kerr, USA. 10Prime&Bond. Dentsply, Germany. 110ptibond solo plus, Kerr, USA. 12BisGMAffEGDMA. 3M ESPE. USA. 13Nene Instruments Ltd.• UK. 14yerabond II, Aalba Dent Inc., USA. 15Calibra with Prime & Bond Resin, Dentsply, Germany. 16Panavia with ED-Primers. Kuraray, Japan. 17Nexus with Optibond Solo Plus Resin, Kerr, USA. 18Vitadur Alpha, VITA Zahnfabrik. Germany. 19Porcelain Etch-it gels, American Dental Supply. USA.
25
Alageel, Omar. "Bonding between metals and polymers for dental devices." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=123299.
Full textAbstract:
Many dental devices combine acrylic (i.e. poly-methyl methacrylate or bisphenol A-glycidyl methacrylate) and metallic parts (i.e. titanium or stainless steel) that are bonded together. These devices often present catastrophic mechanical failures due to weak bonding between their acrylic and metallic components. These devices include dental prostheses, combining metallic frameworks (i.e. titanium) and wrought wires with acrylic resin; and orthodontic appliances, combining acrylic resin with stainless steel wrought wires or composite with stainless steel brackets. The bonding between metals and polymers in dental devices is usually performed by the mechanical interlocking, but its bond strength is still too low for dental applications. The bond strength between them would be high if the chemical bonding, which does not occur spontaneously, uses in addition to the mechanical interlock. The objective of this study was to develop a new method of creating a strong chemical bond between alloys and polymers for dental devices based on diazonium chemistry.The chemical bond between metals (i.e. titanium or stainless steel) and polymers (i.e. poly-methyl methacrylate, PMMA or Bisphenol A-glycidyl methacrylate, Bis-GMA) was achieved in two steps. In the first reaction step (primer), the aryldiazonium salts were chemically reduced to form aryl radicals which spontaneously got grafted onto the metallic surfaces. The second step of the reaction (adhesive) was optimized to achieve covalent binding between the grafted layer and PMMA or Bis-GMA. The chemical composition of the treated surfaces was analyzed with X-ray photoelectron spectroscopy (XPS), and the bonding strengths between alloys and PMMA or Bis-GMA were measured. XPS characterization and contact angle measurement confirmed the presence of a polymer coat on the treated metallic surfaces. Whereas, the mechanical test results showed a significant increase of the tensile bond strength between PMMA and treated titanium or stainless steel wire by 5.2 and 2.5 folds, respectively, compared to the untreated control group (P<0.05). Moreover, the bonding strength between metallic brackets and Bis-GMA composite was increased after the treatment depending on the bracket design by 2 to 3.9 folds compared to untreated brackets. Diazonium chemistry provides an effective way of achieving a strong chemical bond between alloys and PMMA or Bis-GMA. The resulting bonding method can be utilized to further improve the properties of dental devices, reduce debonding of dental prostheses and brackets, provide more leverage in orthodontic cases with complex mechanics, and allow the use of brackets with smaller bases.De nombreux appareils dentaires sont composés d'acrylique (c'est à dire d'un poly -méthacrylate de méthyle ou de bisphénol A- glycidyle méthacrylate) et de parties métalliques (par exemple en titane ou en acier inoxydable) qui sont collés ensemble. Ces dispositifs présentent souvent des défaillances mécaniques catastrophiques en raison de la faiblesse de la liaison entre les composantes en acrylique et celles en métal. Ces dispositifs comprennent les prothèses dentaires, alliant des cadres métalliques (c'est à dire de titane) et fils forgé avec de la résine acrylique, et les appareils orthodontiques, combinant de la résine acrylique avec des fils forgé en acier inoxydable ou un composite avec des supports en acier inoxydable. La force de liaison entre eux serait élevée si la liaison chimique, ce qui ne se produit pas spontanément, est utiliser en plus du verrouillage mécanique. Dans la première étape de la réaction, les sels d'aryl diazonium sont réduits chimiquement pour former des radicaux aryles qui sont spontanément greffés sur les surfaces métalliques La deuxième étape de la réaction a été optimisée pour réaliser la liaison entre la couche greffée et le PMMA ou le Bis-GMA. La caractérisation XPS et la mesure de l'angle de contact a confirmé la présence d'une couche de polymère sur les surfaces métalliques traitées. Les résultats des essais mécaniques ont montré une augmentation significative de la force d'adhérence à la traction entre le PMMA et le titane traité ou d'un fil en acier inoxydable de 5,2 et 2,5 plis, respectivement, par rapport au groupe témoin non traité (p < 0,05). La chimie de diazonium fournit un moyen efficace d'atteindre une liaison chimique forte entre les alliages et le PMMA ou le Bis-GMA. Le procédé de collage qui en résulte peut être utilisé pour améliorer les propriétés des appareils dentaires, réduire le décollement de prothèses dentaires et des supports, et permettre l'utilisation de supports avec des bases plus petites.
26
Liang, Hai-chiung, and 梁海瓊. "Micro-push-out bond strength and the modes of failure for a fibre-reinforced resin-post system cemented using three adhesive lutingcements after cyclic loading." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B45591106.
Full text
27
Ali, Sadia Piyar. "Effect of benzalkonium chloride on resin-dentine bond." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B46848988.
Full text
28
Majeed, Abdul. "An in vitro study of microleakage and surface microhardness of nanocomposite restorative materials." Thesis, University of the Western Cape, 2005. http://etd.uwc.ac.za/index.php?module=etd&.
Full textAbstract:
The demand for posterior aesthetic restorations has dramatically increased in recent years. Several new materials have been developed with improved aesthetic, adhesive and mechanical properties. However, microleakage elimination, especially if the margins are on dentine or cementum, and attainment of optimum mechanical properties for posterior use, are still questionable. The aim of this study was to investigate microleakage and surface microhardness of a nanofilled, a nanohybrid and an ormocer based nano-ceramic composite restorative material.
29
Tay, Franklin R. "An interactive micromorphological study of resin infiltration into acid conditioned dentine." [Hong Kong : Faculty of Dentistry, University of Hong Kong], 1997. http://sunzi.lib.hku.hk/HKUTO/record/B38627954.
Full text
30
鄭智明 and Franklin R. Tay. "An interactive micromorphological study of resin infiltration into acid conditioned dentine." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B36544346.
Full text
31
Banna, Trinadha Rao. "The retentive strength of bonded amalgam restorations." Thesis, University of the Western Cape, 2005. http://hdl.handle.net/11394/2040.
Full textAbstract:
Magister Scientiae - MScAmalgam bonding agents have been shown to enhance retention of amalgam restorations by mechanical means. However, recent studies showed that the use o glass ionomer cements and resin cements as lining and bonding materials to amalgam restorations will increase the retentive strength of the amalgam restorations, hence reducing the micro leakage and secondary caries. The purpose of this study was to compare the relative retentive strength of conventional amalgam restorations and bonded amalgam restorations using resin adhesive, glass ionomer cements and resin cements.
South Africa
32
Parks, Meredith S. "An in vivo and in vitro study of a new orthodontic bonding agent." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4533.
Full textAbstract:
Thesis (M.S.)--West Virginia University, 2006.Title from document title page. Document formatted into pages; contains vi, 108 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 52-61).
33
Obeidi, Ali. "Enhancement of bonding to enamel and dentin prepared by Er,Cr:YSGG Laser." Thesis, Birmingham, Ala. : University of Alabama at Birmingham, 2008. https://www.mhsl.uab.edu/dt/2009r/obeidi.pdf.
Full text
34
Berekally, Thomas L. "Some aspects of Maryland Bridge treatments : an 'in-vivo' and 'in-vitro' study." Title page, contents and summary only, 1989. http://web4.library.adelaide.edu.au/theses/09DM/09dmb487.pdf.
Full text
35
Richey, Mark Daniel. "In-vitro evaluation of dye leakage of an MTA apical barrier at varying setting times." Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5790.
Full textAbstract:
Thesis (M.S.)--West Virginia University, 2008.Title from document title page. Document formatted into pages; contains vii, 45 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 32-37).
36
Papazoglou, Efstratios. "On porcelain bonding, oxidation, mechanical properties and high-temperature distortion of high-palladium dental casting alloys." The Ohio State University, 1999. http://catalog.hathitrust.org/api/volumes/oclc/47770015.html.
Full textAbstract:
Thesis (Ph. D.)--Ohio State University, 1999.Advisor: William A. Brantley, Oral Biology Program. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
37
Ekambaram, Manikandan. "Aspects of solvents in dentine bonding." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2015. http://hdl.handle.net/10722/208591.
Full textAbstract:
Degradation starts at the resin-dentine bonded interfaces within a few months’ of bonding. There are two major causes of degradation of the bonded interfaces over time. The simplified dental adhesives that are routinely used in the contemporary clinical dental practice are extremely hydrophilic and are prone to water sorption, leading to hydrolytic degradation. Dentine matrix-bound metalloproteinases (MMPs) and cysteine cathepsins (CCs) are proteolytic enzymes that have been shown to degrade the uninfiltrated demineralized collagen at the bottom of the hybrid layer.
Ethanol-wet bonding (EWB) with hydrophobic adhesive has been proven to improve the longevity of resin-dentine bonds in vitro. Chlorhexidine (CHX) treatment of demineralized dentine before bonding with adhesive resin has been shown to preserve resin-dentine bond durability in vivo and in vitro by inhibition of dentine matrixbound MMPs and CCs. However, it is not known whether simultaneous application of CHX and EWB would have any interactional effect on stability of resin-dentine bonds.
1-Ethyl-3-[3-dimethylaminopropyl] carbodiimide hydrochloride (EDC), both a dentine collagen cross-linker and a MMP inhibitor, has been shown to preserve dentine bond durability in vitro. However, both EDC and CHX are prepared in aqueous solutions using water as a solvent for application. The MMPs are hydrolases and the presence of residual water in the demineralized dentine following EDC and CHX applications will enhance dentine bond degradation.
The general aims of this thesis were to investigate the effects of solvents in resindentine bonding, in particular the role of solvents in the enhancement of resin-dentine bond durability.
In the earlier part of this thesis, the adjunctive application of 2% CHX with EWB using the simplified dehydration protocol for 60 s was examined as a bonding strategy to preserve dentine bond durability to sound and caries-affected dentine. The adjunctive application of EWB and CHX preserved bond durability of hydrophobic adhesive to both sound and caries-affected dentine after 12 months’ ageing. The same bonding strategy was applied to preserve the bond durability of luting fibre post to radicular dentine. However, the addition of 2% CHX to EWB did not further improve bond durability of hydrophobic adhesive to radicular dentine, when compared to EWB alone.
In the later part of this thesis, the role of the solvents (commonly used in commercial dentine adhesives) in the enhancement of dentine bond preservation potential by CHX and EDC were assessed. The incorporation of 2% CHX in ethanol showed greater inhibitory effect on matrix-bound proteases than 2% CHX in water. Conversely, the use of acetone as a solvent for EDC also enhanced its dentine collagen cross-linking potential. The dentine collagen cross-linked by EDC in acetone was more resistant to enzymatic degradation.
Within the limitations of this thesis, it could be concluded that solvents play a significant role in the enhancement of dentine bond durability. In general, ethanol and acetone are better than water for the preservation of dentine bond durability.published_or_final_version
Dentistry
Doctoral
Doctor of Philosophy
38
Gale, Martin Stuart Gale Martin Stuart. "Dental filled resin restorations : seal integrity of the dentine bond /." [Hong Kong] : Faculty of Dentistry, The University of Hong Kong, 1996. http://sunzi.lib.hku.hk/HKUTO/record/B38627942.
Full textAbstract:
Thesis (Ph.D)--University of Hong Kong, 1997.A journal entitled Three-dimensional reconstruction of microleakage pattern using a sequential grinding technique by M.S. Gale, B.W. Darvell and G.S.P. Cheung bound at back of the thesis. Includes bibliographical references (leaves 495-520) Also available in print.
39
Harrington, Pamela P. "Post retention with mineral trioxide aggregate and accelerated Portland cement." Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=4035.
Full textAbstract:
Thesis (M.S.)--West Virginia University, 2005.Title from document title page. Document formatted into pages; contains viii, 57 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 34-39).
40
Lalani, Nazir. "Polymerization with the argon laser curing time and shear bond strength /." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0007/MQ30666.pdf.
Full text
41
Yiu, Kar-yung Cynthia. "Fluid transport across bonded dentin interfaces." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B36841201.
Full text
42
Yiu, Kar-yung Cynthia, and 姚嘉榕. "Fluid transport across bonded dentin interfaces." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B36841201.
Full text
43
Kwong, S. M. "In-vitro study of the bonding of a self-etching primer to noncarious sclerotic cervical dentine." Click to view the E-thesis via HKUTO, 2000. http://sunzi.lib.hku.hk/HKUTO/record/B38628235.
Full text
44
鄺社滿 and S. M. Kwong. "In-vitro study of the bonding of a self-etching primer to noncarious sclerotic cervical dentine." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B38628235.
Full text
45
Hudson, Athol Peter Gilfillan. "Comparative bond strengths of stainless steel orthodontic brackets bonded with different bonding agents." Thesis, University of the Western Cape, 2007. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_4825_1256889166.
Full text
46
Mahindre, Prajakta Prakash. "Micro-push-out bond strength and the modes of failure for a fiber-reinforced resin-post system cemented using four adhesive luting cements." Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B43224052.
Full text
47
Trieu, Sophia Tuyet-Nhi. "Comparison of Microshear Bond Strength and Morphological Changes Between Active and Passive Application of 4th Generation Etch-and-Rinse Etchant on Enamel." PDXScholar, 2010. https://pdxscholar.library.pdx.edu/open_access_etds/358.
Full textAbstract:
Over 200 million dental restorations are performed each year in America. A dental restoration require a strong bonding of restoration to tooth structure and relies on the dental adhesive to create this mechanical and chemical bonding. Dental adhesion or bonding is the process of forming an adhesive joint between the composite and tooth substrate: dentin or enamel. Clinical problems such as microleakage at the restoration tooth interface, influx of fluids, or bacteria growth at the cavity wall can be prevented with adhesives that obtain a more intimate bonding. Longevity of the restoration can be enhanced by the adhesive that creates the tight bonding to reduce problems such as postoperative sensitivity, marginal staining, and recurrent caries. The goal of this research project is to investigate the influence of active scrubbing application as compared to passive non-scrubbing application of the etchant component in 4th generation etch-and-rinse adhesive systems. Shear bond stresses have been measured and compared between application techniques. Verification of resin infiltration depth with each etchant application has been examined with scanning electron microscopy by mounting the etched and bonded enamel surface of the tooth in epoxy and slicing the tooth longitudinally producing a transverse, depth-wise view. Results from this study have clarified the role of resin tag formation as well as tooth morphology during an active acid etchant application for dental restoration.
48
Chitre, Swati Dinesh. "Evaluation of two methods of fissure treatment before sealant placement on different caries levels." Connect to resource online, 2009. http://hdl.handle.net/1805/2078.
Full textAbstract:
Thesis (M.S.D.)--Indiana University School of Dentistry, 2009.Title from PDF t.p. (viewed Feb. 5, 2010) Advisor(s): Michael A. Cochran, Chair of the Research Committee, Armando E. Soto Rojas, Margherita R. Fontana, Timothy Carlson, Tien-Min Gabriel Chu. Curriculum vitae. Includes abstract. Includes bibliographical references (leaves 56-61).
49
Silva, Miguel Tiago dos Santos Marinho da. "Estudo in vitro do interface implante-pilar de estruturas para sobredentaduras, por microscopia ótica, com diferentes tipos de implantes." Master's thesis, [s.n.], 2014. http://hdl.handle.net/10284/4367.
Full textAbstract:
Projeto de Pós-Graduação/Dissertação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina DentáriaA perda de um ou mais dentes pode envolver, para além de um problema funcional, um problema psicológico associado ao comprometimento estético. A implantologia proporcionou novas alternativas de reabilitação. Atualmente existem inúmeros formatos e diâmetros de implantes e respetivos componentes. Muitos são os fatores que podem favorecer o desenvolvimento de doenças peri-implantares. Os implantes dentários não são totalmente cobertos; parte deles ficam expostos, sendo facilmente colonizados pelas bactérias. Essa colonização pode originar doenças peri-implantares, e posteriormente perda do implante. A possibilidade de contaminação do implante é grande, ainda mais quando se sabe que a união entre implante e intermediário não é perfeita. Tal falha pode acarretar a infiltração de fluidos e bactérias para o interior do implante, favorecendo as alterações clinicas e microbiológicas dos tecidos gengivais e do osso adjacente. Até ao momento, a infiltração bacteriana na união entre o implante e o pilar é inevitável. Neste seguimento surge este trabalho, cujo objetivo principal consistiu na análise por microscopia ótica de várias marcas e formas de implantes e os seus intermediários, de modo a poder inferir se existem diferenças significativas entre eles. Para a realização deste estudo foi efetuada uma vasta pesquisa bibliográfica baseada em livros e em repositórios científicos como a Pubmed e Science Direct, tendo sido selecionados artigos publicados nos últimos 25 anos. As palavras-chave utilizadas foram “dental implant bars fit”, “gap junction dental implant”, “microleakeage implant”, “Implant Microgap”, “leakage dental implant”, “microbial leakage dental implant”, Com base na literatura encontrada foi idealizado um protoloco que pretendeu avaliar a distância média entre o implante e o pilar nas suas diferentes formas de conexão existentes. Como principais conclusões deste estudo pode afirmar-se que não existem diferenças estatisticamente significativas entre as duas formas de conexão estudadas e as duas formas de pilar incorporadas no estudo. The loss of one or more teeth can create, besides from a functional issue, a psychological issue associated with loss of aesthetics. Implantology has provided new alternatives of oral rehabilitation. At present there are several forms and sizes of implants available and their correspondent components. There are a lot of factors that can lead to the development of peri-implant diseases. Dental implants are not fully coated; parts of them are exposed, facilitating the bacterial colonization. This colonization can therefore originate peri-implant diseases, and with time, the implant loss. The possible contamination of the implant is high, even more when it is known that the junction between implants and their intermediate is not perfect. Such junction can lead to the infiltration of fluids and bacteria to the implant interior, facilitating the clinic and microbiologic alterations of the gums and the surrounding bone. Until now, the bacteriological infiltration in the junction between the implant and the abutment is unavoidable. In this context, this work was performed with the main goal of analysing, by optic microscopy, several brands and shapes of implants and their intermediaries, to be able to discern if there are any significant differences between them. In order to carry out this study, a wide bibliographic search based on scientific books and repositories like Pubmed and Science Direct was performed, analysing scientific articles in this topic which have been published in the last 25 years. The key words used were “dental implant bars fit”, “gap junction dental implant”, “microleakage implant”, “Implant Microgap”, “leakage dental implant”, “microbial leakage dental implant”. Based on the literature found, a protocol was idealized to evaluate the average distance between the implant and the abutment, in the different ways of connection that exist. As the main conclusion of this study, it can be said that there are no statistical significant differences between the two forms of connections studied, and the two forms of abutments incorporated in this study.
50
Xu, Jingwei. "Vibrational spectroscopic investigations of calcium phosphates and dental materials." Thesis, McGill University, 1996. http://catalog.hathitrust.org/api/volumes/oclc/47977978.html.
Full text