Repair bond strengths of non-aged and aged resin nanoceramics
The Journal of Advanced Prosthodontics
;
: 364-370, 2017.
Article
in English
| WPRIM
| ID: wpr-31725
ABSTRACT
PURPOSE:
To explore the influence of different surface conditionings on surface changes and the influence of surface treatments and aging on the bond strengths of composites to non-aged and aged resin nanoceramics. MATERIALS ANDMETHODS:
Rectangular-shaped non-aged and aged (5000 thermocycles) resin nanoceramic specimens (Lava Ultimate) (n=63, each) were divided into 3 groups according to surface treatments (untreated, air abrasion, or silica coating) (n=21). The surface roughness was measured and scanning electron microscopy was used to examine one specimen from each group. Afterwards, the specimens were repaired with a composite resin (Filtek Z550) and half were sent for aging (5000 thermocycles, n=10, each). Shear bond strengths and failure types were evaluated. Roughness and bond strength were investigated by two- and three-way analysis of variance, respectively. The correlation between the roughness and bond strength was investigated by Pearson's correlation test.RESULTS:
Surface-treated samples had higher roughness compared with the untreated specimens (P=.000). For the non-aged resin nanoceramic groups, aging was a significant factor for bond strength; for the aged resin nanoceramic groups, surface treatment and aging were significant factors. The failures were mostly adhesive after thermal cycling, except in the non-aged untreated group and the aged air-abraded group, which had mostly mixed failures. Roughness and bond strength were positively correlated (P=.003).CONCLUSION:
Surface treatment is not required for the repair of non-aged resin nanoceramic; for the repair of aged resin nanoceramic restorations, air abrasion is recommended.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Aging
/
Microscopy, Electron, Scanning
/
Adhesives
/
Silicon Dioxide
Language:
English
Journal:
The Journal of Advanced Prosthodontics
Year:
2017
Type:
Article
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