title: Effect of different bonding strategies on the marginal adaptation of class 1 silorane restorations.
abstract: OBJECTIVE
  To evaluate the quality of marginal and internal adaptation of Filtek Silorane composite in standardized class 1 cavities before and after thermo-mechanical loading using different application protocols of the Silorane System Adhesive (SSA).
  
  
  METHODS
  Five groups (n = 10) of class 1 cavities were restored with Filtek Silorane using different SSA applications. Total bonding (TB): Group A (SSA), Group B (SSA without primer polymerization), Group C (enamel etching + SSA), Group D (enamel etching + SSA without primer polymerization) and Selective bonding (SB): Group E. Marginal adaptation was assessed on replicas in the SEM at x200 magnification before and after thermomechanical loading (3,000 x 5-55 degrees C, 1.2.10(6) x 49N; 1.7Hz) under simulated dentin fluid. After loading, the samples were sectioned and the internal adaptation was evaluated as well.
  
  
  RESULTS
  The lowest scores of %CM (Continuous Margin) before/after thermo-mechanical loading being 80.8 (+/- 8.2) / 32.1 (+/- 8.3) were observed in the control group A. Enamel phosphoric acid etching prior to the application of the SSA resulted in significantly higher %CM before and after loading in comparison with the "non-etched" groups (P > 0.05). When enamel etching was performed before the application of the adhesive system, no statistically significant differences (P > 0.05) were observed regardless of how the SSA was applied (total vs. selective bonding). Internal adaptation was negatively influenced by omitting the SSA-primer polymerization (P > 0.05).
authors.affiliation: Division of Cariology and Endodontology, School of Dentistry, University of Geneva, Rue Barthélemy-Menn 19, CH-1205 Geneva, Switzerland. ladislav.gregor@unige.ch
authors.forename: Ladislav
authors.initials: L
authors.lastname: Gregor
authors.forename: Tissiana
authors.initials: T
authors.lastname: Bortolotto
authors.forename: Albert J
authors.initials: AJ
authors.lastname: Feilzer
authors.forename: Ivo
authors.initials: I
authors.lastname: Krejci
mesh_terms: D003793:Dental Restoration, Permanent; D006801:Humans; D008855:Microscopy, Electron, Scanning; D062047:Silorane Resins
chemical_list: D062047:Silorane Resins