Evaluation of the bond strength between aged composite cores and luting agent
The Journal of Advanced Prosthodontics
;
: 108-114, 2015.
Article
in English
| WPRIM
| ID: wpr-144375
ABSTRACT
PURPOSE:
The aim of this study was to evaluate effect of different surface treatment methods on the bond strength between aged composite-resin core and luting agent. MATERIALS ANDMETHODS:
Seventy-five resin composites and also seventy-five zirconia ceramic discs were prepared. 60 composite samples were exposed to thermal aging (10,000 cycles, 5 to 55degrees C) and different surface treatment. All specimens were separated into 5 groups (n=15) 1) Intact specimens 2) Thermal aging-air polishing 3) Thermal aging- ErYAG laser irradiation 4) Thermal aging- acid etching 5) Thermal-aging. All specimens were bonded to the zirconia discs with resin cement and fixed to universal testing machine and bond strength testing loaded to failure with a crosshead speed of 0.5 mm/min. The fractured surface was classified as adhesive failure, cohesive failure and adhesive-cohesive failure. The bond strength data was statistically compared by the Kruskal-Wallis method complemented by the Bonferroni correction Mann-Whitney U test. The probability level for statistical significance was set at alpha=.05.RESULTS:
Thermal aging and different surface treatment methods have significant effect on the bond strength between composite-resin cores and luting-agent (P<.05). The mean baseline bond strength values ranged between 7.07 +/- 2.11 and 26.05 +/- 6.53 N. The highest bond strength of 26.05 +/- 6.53 N was obtained with Group 3. Group 5 showed the lowest value of bond strength.CONCLUSION:
Appropriate surface treatment method should be applied to aged composite resin cores or aged-composites restorations should be replaced for the optimal bond strength and the clinical success.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Aging
/
Complement System Proteins
/
Ceramics
/
Adhesives
/
Resin Cements
/
Dental Cements
/
Lasers, Solid-State
Language:
English
Journal:
The Journal of Advanced Prosthodontics
Year:
2015
Type:
Article
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