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In vitro evaluation of the marginal microleakage of class II amalgam restoration associated with dentin adhesive Avaliação in vitro da microinfiltração marginal de restauração de amálgama classe II associada a adesivos dentinários

By Fabiana Sodré de OLIVEIRA, Salete Moura Bonifácio da SILVA, Maria Francisca Thereza Borro BIJELLA and José Eduardo de Oliveira LIMA

Abstract

The marginal microleakage of class II amalgam restorations (Dispersalloy) associated with copal varnish (Copalite) and with two dentin bonding agents (Scotchbond Multi-uso Plus and Multi Bond Alpha) was evaluated in vitro and compared by two methods: scores and linear measurements. Forty-five sound premolars were used, on which two separated class II cavities were prepared on the M and D surfaces. After the restoration, the specimens were thermocycled and stored in a solution of 0.5% basic fuchsin during 24 hours. The analysis allowed to conclude that none of the three restorative systems were able to eliminate the marginal microleakage. Nevertheless, the leakage was significantly smaller on the restorations associated with dentin bonding agents when compared to copal varnish. The linear measurement method was more sensitive than the score criteria.<br>A microinfiltração marginal de restaurações de amálgama classe II (Dispersalloy), associada ao verniz convencional (Copalite) e a dois adesivos dentinários (Scotchbond Multi-uso Plus e Multi Bond Alpha), foi avaliada e comparada in vitro através de dois métodos: escores e medidas lineares. Foram utilizados 45 pré-molares hígidos que receberam duas cavidades independentes M e D. Após a restauração, foram submetidos à termociclagem e armazenados em uma solução de fucsina básica a 0,5% durante 24 horas. A análise da infiltração do corante permitiu concluir que nenhum dos três sistemas restauradores foi capaz de eliminar a microinfiltração marginal. No entanto, ela foi menor e estatisticamente significante para as restaurações associadas aos adesivos dentinários, quando comparadas àquelas com o verniz cavitário. O método das medidas lineares foi mais sensível do que o de escores

Topics: Infiltração dentária, Amálgama dentário, Adesivos dentinários, Forramento da cavidade dentária, Dental leakage, Dental amalgam, Dentin bonding agents, Dental cavity lining, Dentistry, RK1-715, Medicine, R, DOAJ:Dentistry, DOAJ:Health Sciences
Publisher: Universidade de São Paulo
Year: 1999
DOI identifier: 10.1590/S0103-06631999000300010
OAI identifier: oai:doaj.org/article:af0fe12e65ce4bfabc4af7c27550c12f
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