Microtensile bond strength of repaired indirect resin composite
The Journal of Advanced Prosthodontics
;
: 38-44, 2017.
Article
in English
| WPRIM
| ID: wpr-107070
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 ANDMETHODS:
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.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Plastics
/
Ultrasonics
/
Water
/
Fungi
Language:
English
Journal:
The Journal of Advanced Prosthodontics
Year:
2017
Type:
Article
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