Microtensile bond strength of repaired indirect resin composite.
- Author:
Porntida VISUTTIWATTANAKORN
1
;
Kallaya SUPUTTAMONGKOL
;
Duangjai ANGKOONSIT
;
Sunattha KAEWTHONG
;
Piyanan CHAROONANAN
Author Information
- Publication Type:Original Article
- Keywords: Surface treatment; Indirect resin composite; Microtensile bond strength; Sandblast; Silane; Ultrasonic
- MeSH: Fungi; Plastics; Ultrasonics; Water
- From:The Journal of Advanced Prosthodontics 2017;9(1):38-44
- CountryRepublic of Korea
- Language:English
- Abstract: PURPOSE: The objective of this study was to investigate the effect of surface treatments on microtensile bond strengths (MTBSs) of two types of indirect resin composites bonded to a conventional direct resin composite. MATERIALS AND METHODS: Indirect resin composite blocks of Ceramage and SR Nexco were prepared in a plastic mold having a dimension of 10 × 10 × 4 mm. These composite blocks were divided into three groups according to their surface treatments: Group1: Sandblast (SB); Group2: Sandblast and ultrasonically clean (SB+UL); Group3: Sandblast plus silane (SB+SI). After bonding with direct resin composite, indirect-direct resin composite blocks were kept in distilled water for 24 hours at 37℃ and cut into microbars with the dimension of 1 × 1 × 8 mm. Microbar specimens (n = 40 per group) were loaded using a universal testing machine. Failure modes and compositions were evaluated by SEM. The statistical analyses of MTBS were performed by two-way ANOVA and Dunnett's test at α = .05. RESULTS: Surface treatments and brands had effects on the MTBS without an interaction between these two factors. For SR Nexco, the MTBSs of SB and SB+SI group were significantly higher than that of SB+UL. For Ceramage, the MTBSs of SB and SB+SI were significantly higher than that of SB+UL. The mean MTBS of the Ceramage specimens was significantly higher than that of SR Nexco for all surface treatments. CONCLUSION: Sandblasting with or without silane application could improve the bond strengths of repaired indirect resin composites to a conventional direct resin composite.
