10-YEAR CLINICAL-ASSESSMENT OF 3 POSTERIOR RESIN COMPOSITES AND 2 AMALGAMS

Objective: The long-term clinical performance of three posterior resin composites and Two amalgams was assessed Method and materials: Thirty Class II restorations each of P-30, Occlusin, Clearfil Posterior (com posites), New True Dentalloy, and Solila Nova (amalgams) were placed. Reviews rook place at 6 months and at 1, 2, 3, 4, 5, and IO years. At each visit the gingival condition, the contact point status, and the p resence of ledges, gaps, or recurrent caries were assessed. The color match, cavosurface marginal stain, general surface stain, tarnish, and corrosion were also scored where applicable. Epoxy resin replicas wet -e used to measure the maximum depth of wear: Results: After 10 years, there had been corrosion of both the high- and low-copper amalgams an d a slight deterioration in color match of a number of composite resto rations. Eighteen (of 20) Occlusin restorations had obvious cavosurfac e marginal stain, attributed to staining of the unfilled bonding resin layer: Statistical analysis indicated that New True Dentalloy; Solila Nova, and Clearfil-P exhibited significantly less wear than Occlusin and P-30. None of the the restorations examined at the 10-year recall required replacement. Conclusion: The five materials, placed in a dent al school environment, provided adequate clinical service for IO years .