Shear bond strength of resin cement by different surface treatments on base metal alloy
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Date
2010-06-03
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Chiang Mai Dental Journal
Abstract
The purpose of this study is to study the shear bond strength of resin cement on surface of base metal alloy after removal of temporary cement. A total of 90 premolars without caries were divided into 3 groups (30 per group) ; 1. control group(without temporary cement), 2. temporary cementation with noneugenol cement and 3. temporary cementation with eugenol cement. The specimens were cemented with resin cement to base metal discs for 7 days. The temporary cement was removed from the base metal discs by ultrasonic scaler . Each group of specimens was further divided into 3 subgroups (10 per group); a. sandblasted by aluminum oxide powder (50 micron), b. wiped by acrylic monomer and c. no surface treatment. The metal discs were bonded to dentinal surfaces with dual-cure resin cement (RelyX™ U100 Self-Adhesive Resin Cement). After storing the specimens in room temperature for 24 hours, they were tested in shear bond strength by the universal testing machine at a crosshead speed of o.5 mm./min. The data were statistically analyzed by using One-way ANOVA. The results showed that sandblasting technique was more effective than monomer applying, however monomer applying exhibited a higher mean shear bond strength than no any treatment. Temporary cement with eugenol had adverse effect on shear bond strength.Keywords: shear bond strength, temporary cement, acrylic monomer
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Chiang Mai Dental Journal; Vol.30 No.1 2009; 55-60