title: Resin cement to indirect composite resin bonding: effect of various surface treatments.
abstract: Debonding at the composite-adhesive interface is a major problem for indirect composite restorations. The aim of this study was to evaluate the bond strength (BS) of an indirect composite resin after various surface treatments (air-abrasion with Al2O3, phosphoric acid-etchig and different applications of NdYAG laser irradiations). Fifty composite disks were subjected to secondary curing to complete polymerization and randomly divided into five experimental groups (n = 10) including Group 1, untreated (control); Group 2, phosphoric acid-etched; Group 3, air-abrasion with Al2 O3 ; Group 4, Nd:YAG laser irradiated with non-contact and Group 5, Nd:YAG laser irradiated with contact. They were then bonded to resin cement and shear BS was determined in a universal testing device at a crosshead speed of 1 mm/min. One way analysis of variance (ANOVA) and Tukey post-hoc tests were used to analyze the BS values. The highest BS value was observed in Group 4 and followed by Group 3. Tukey test showed that there was no statistical difference between Group1, 2 and 5. Furthermore, differences in BSs between Group 4 and the other groups except Group 3 were significant (p < 0.05) and also there were significant differences in BSs between Group 3 to 1 and Group 3 to 2 (p < 0.05). This study reveals that air-abrasion with Al2 O3 and Nd:YAG laser irradiation with non-contact provided a significant increase in BS between indirect composite and resin cement.
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, ﻿Akdeniz University, Antalya, Turkey.
authors.forename: Omer
authors.initials: O
authors.lastname: Kirmali
authors.forename: Cagatay
authors.initials: C
authors.lastname: Barutcugil
authors.forename: Osman
authors.initials: O
authors.lastname: Harorli
authors.forename: Alper
authors.initials: A
authors.lastname: Kapdan
authors.forename: Kursat
authors.initials: K
authors.lastname: Er
mesh_terms: D056808:Biostatistics; D055598:Chemical Phenomena; D003188:Composite Resins / Q000737:chemistry*; D045662:Dental Etching / Q000379:methods*; D006801:Humans; D019279:Resin Cements / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D003188:Composite Resins; D019279:Resin Cements
keywords: Nd:YAG laser; SEM; bond strength; indirect composite resin; surface treatment