The study of bulk filled composite resin on marginal integrity and internal adaptation of class i direct restoration

Abstract

Most studies of bulk fill composite resin focused on their mechanical properties. But marginal and internal leakage, one of the commonly found failures, is still inconclusive. The aim of this study was to investigate the marginal and internal leakage of bulk fill composite resin restorations by using three adhesives as bonding agent, compared to conventional hybrid composite resin.

Marginal integrity test and internal adaptation test were included in this study, 210 teeth in each test. Five bulk fill composite resins (Filtek® Bulk Fill, Tetric® N-Ceram Bulk Fill, X-trafil®, Venus® Bulk fill and SonicFill®) and a conventional hybrid composite resin (Filtek® Z250) were used in this study. Three bonding agents, Adper® single bond 2, Clearfil® SE bond and Superbond C&B®, were used as adhesive. After 5,000 cycles of thermo-cycling, all specimens were placed in 2% methylene blue dye solution for 30 minutes. Marginal and internal leakage were photographically evaluated using Image pro plus® software and reported in percentage of entire restoration margin.

Two-way ANOVA suggested that there were significant difference on 2 main factors; bonding agent and composite resin, and interaction (p < 0.05). Multiple comparison with Tukey HSD revealed that using Superbond C&B® with Tetric® N-Ceram Bulk Fill demonstrated the least percentage of marginal and internal leakage.Type of bonding agent and composite resin had an effect on marginal leakage and internal leakage in Class l dentine cavity. Tetric® N-Ceram Bulk Fill with Superbond C&B® as bonding agent showed the least marginal leakage and internal leakage than the others.