Avaliação da microinfiltração marginal e da resistência adesiva em dentes restaurados com inlays de resina composta. Efeito da hibridização imediata do preparo cavitário
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Data
2004-02-27
Autores
Freitas, Cláudia Regina Buainain de [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
O objetivo deste estudo foi avaliar o procedimento de hibridização imediata em restaurações indiretas de resina composta. A hipótese nula foi duplicada: os resultados dos adesivos de condicionamento total e auto-condicionante são similares; e a hibridização imediata produz microinfiltração e resistência adesiva similares à cimentação convencional. Foram selecionados 20 terceiros molares humanos recém extraídos e isentos de cárie, nos quais foram realizados preparos cavitários MOD, padronizados para restaurações indiretas. Os dentes foram divididos aleatoriamente em 4 grupos experimentais: (G1) hibridização com adesivo de condicionamento total (SB, Single Bond, 3M ESPE) imediatamente após o preparo cavitário e antes da cimentação, (G2) hibridização com adesivo de condicionamento total antes da cimentação (SB), (G3) hibridização com adesivo auto-condicionante (AP, Adper Prompt, 3M ESPE) imediatamente após o preparo cavitário e antes da cimentação, (G4) hibridização com adesivo auto-condicionante (AP) antes 157 da cimentação. Os espécimes foram restaurados com inlays de Targis (Ivoclar/Vivadent), cimentados com cimento resinoso Rely X ARC (3M ESPE). Todos produtos foram manipulados de acordo com as instruções do fabricante. Após termociclagem, os espécimes foram imersos em solução de nitrato de prata 50%, seccionados para avaliação da microinfiltração com escores pré-determinados de 0 a 3. Em seguida, os espécimes foram novamente seccionados com 0,8mm x 0,8mm para realização dos testes de microtração. Os resultados obtidos foram submetidos à análise estatística (p<0,05). Os escores da microinfiltração foram submetidos ao teste de Mann-Whitney indicando nenhuma diferença na técnica de hibridização (p>0,05). Os resultados da microtração foram submetidos à análise de variância que revelou... .
An analysis was carried out to determine the behavior of immediate hybridization on indirect composite resin restorations. The null hypothesis was two fold: were whether total etch or self-etch (SEA) adhesives result in similar; and whether immediate hybridization produces similar microleakage and æTBS than conventional cementation. Twenty sound extracted teeth were selected and 20 standardized MOD inlay preparations were made. The prepared teeth were randomly assigned in four experimental groups: (G1) hybridization with total-etch adhesive (SB, Single Bond, 3M ESPE) immediately after preparation and prior cementation, (G2) hybridization with total-etch adhesive prior cementation (SB), (G3) hybridization with SEA (AP, Adper Prompt, 3M ESPE) immediately after preparation and prior cementation; and (G4) hybridization with SEA (AP) prior cementation. The specimens were restored with Targis (Ivoclar/Vivadent) inlays, cemented with composite resin cement (RelyX ARC, 3M ESPE). All products were used according with manufacturer's instructions. The specimens were 160 thermocycled and immersed in 50%w/w silver nitrate. The specimens were sectioned and the microleakage evaluated with predetermined scores (0-3). Then, the specimens were sectioned in 0,8mm x 0,8mm and æTBS tested in a MTS-810 machine. The obtained data were submmited to statistical analysis (p< .05). The microleakage scores were submmited to Mann-Whitney non-parametric test showing no statistical differences among the adhesives and technique (p> .05). The æTBS results submitted to ANOVA parametric test reveled that G1 performed better than G2, and G3 superior to G4. The null hypotheses were partially rejected. None of the adhesives eliminate microleakage. Hybridization immediately after the preparation is done and before cementation improved the bond strengths with... (Complete abstract, click electronic address below).
An analysis was carried out to determine the behavior of immediate hybridization on indirect composite resin restorations. The null hypothesis was two fold: were whether total etch or self-etch (SEA) adhesives result in similar; and whether immediate hybridization produces similar microleakage and æTBS than conventional cementation. Twenty sound extracted teeth were selected and 20 standardized MOD inlay preparations were made. The prepared teeth were randomly assigned in four experimental groups: (G1) hybridization with total-etch adhesive (SB, Single Bond, 3M ESPE) immediately after preparation and prior cementation, (G2) hybridization with total-etch adhesive prior cementation (SB), (G3) hybridization with SEA (AP, Adper Prompt, 3M ESPE) immediately after preparation and prior cementation; and (G4) hybridization with SEA (AP) prior cementation. The specimens were restored with Targis (Ivoclar/Vivadent) inlays, cemented with composite resin cement (RelyX ARC, 3M ESPE). All products were used according with manufacturer's instructions. The specimens were 160 thermocycled and immersed in 50%w/w silver nitrate. The specimens were sectioned and the microleakage evaluated with predetermined scores (0-3). Then, the specimens were sectioned in 0,8mm x 0,8mm and æTBS tested in a MTS-810 machine. The obtained data were submmited to statistical analysis (p< .05). The microleakage scores were submmited to Mann-Whitney non-parametric test showing no statistical differences among the adhesives and technique (p> .05). The æTBS results submitted to ANOVA parametric test reveled that G1 performed better than G2, and G3 superior to G4. The null hypotheses were partially rejected. None of the adhesives eliminate microleakage. Hybridization immediately after the preparation is done and before cementation improved the bond strengths with... (Complete abstract, click electronic address below).
Descrição
Palavras-chave
Microinfiltração dentária, Resistência à tração, Total-etch, Self-etch, Adhesion, Composite inlay, Microleakage, Microtensile bond strengths
Como citar
FREITAS, Cláudia Regina Buainain de. Avaliação da microinfiltração marginal e da resistência adesiva em dentes restaurados com inlays de resina composta. Efeito da hibridização imediata do preparo cavitário. 2004. 160 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Odontologia de Araraquara, 2004.