An in vitro microleakage study of different filling materials using dye penetration method

In the present study, the marginal integrity of different filling materials was evaluated in invitro. Furthermore, the effect of manipulation technique on their microleakage was also investigated. A total of sixty standard prepared class V cavities were filled with glass ionomer cement (both auto-cured and light-cured), light cured packable variety composite resin pretreated with echant and bonding agent and dental amalgam (both mechanically and conventional hand mixed) with or without pretreatment by cavity varnish. Cavities were then subjected to microleakage test following thermocycling. Statistical analysis was performed by One way ANOVA and Sheffe's multiple comparison tests. The results showed that mechanically mixed Silver Amalgam pretreated with cavity varnish showed the least microleakage, whereas, autocured glass ionomer showed highest marginal leakage. Light-cured packable composite was superior in resisting microleakage than both types of glass ionomer but was inferior to dental amalgam in the same respect. From this study, it can be concluded that composite resin can be used to fill class V cavities for esthetic reason but their properties should be improved.