OBJECTIVE: To assess the marginal adaptation of ormocer-, @entity16971 -, and @entity11379 -based composite restorative systems bonded to dentin cavities after water storage. METHOD AND MATERIALS: Cylindric dentin cavities were prepared on the buccal surfaces of 45 extracted @entity1 molars after their enamel was removed. The cavities were assigned to one of three groups (each n = 15). Each group was restored with one of three composite/adhesive systems: an ormocer-based (Admira/Admira Bond), a @entity16971 -based (Filtek P90/P90 System Adhesive), and a @entity11379 -based (Tetric Ceram/Excite). Marginal adaptation was evaluated immediately after polymerization and after 1 month and 1 year of water aging and thermocycling. Evaluation was performed under a metallographic microscope by recording frequency of gap-free restorations, width of maximum @entity3067 ( @entity3067 ), percentage length of debonded margins relative to cavity periphery ( @entity3918 ), and marginal index (MI = @entity3067 x @entity3918 /100). The results were statistically analyzed with two-way ANOVA and the Tukey test at a = .05. RESULTS: None of the composite/adhesive systems examined exhibited gap-free restorations at any aging time. Marginal adaptation was significantly affected by the type of restorative/adhesive system, while water aging time had no significant effect. @entity16971 composite restorations exhibited the lowest @entity3067 , @entity3918 , and MI values, while @entity11379 composite restorations revealed the highest values. Ormocer restorations showed intermediate values. CONCLUSION: Although all examined composite systems failed to achieve gap-free margins with dentin cavities, the @entity16971 -based system revealed the best marginal adaptation at all aging times.

Marginal adaptation of ormocer-, @entity16971 -, and XXXX -based composite restorative systems bonded to dentin cavities after water storage.

@entity1 :: ('9606', 'Species') :: ['human'] @entity11379 :: ('CHEBI:25218', 'Chemical') :: ['methacrylate'] @entity3067 :: ('MESH:C531609', 'Disease') :: ['MG', 'marginal gap'] @entity3918 :: ('MESH:D009223', 'Disease') :: ['DM'] @entity16971 :: ('MESH:D062047', 'Chemical') :: ['silorane', 'Silorane']
@entity11379 :: (CHEBI:25218,Chemical) :: ['methacrylate']
