|
KMID : 0988720060220030211
|
|
Journal of the Korean Academy of Stomatognathic Function and occlusion
2006 Volume.22 No. 3 p.211 ~ p.220
|
|
|
Shear Bond Strength of Porcelain Repair Systems
|
|
Cho In-Ho
|
|
|
Abstract
|
|
|
|
Shear Bond Strength of Porcelain Repair Systems Soo Woo, Soo-Youn Shin, In-ho Cho Department of Prosthodontics, Collage of Dentistry, Dankook University Need of porcelain-repair system is largely demanding as dental porcelain restorations are increased in clinical dentistry. This study investigated shear bond strength of commercial porcelain-repair systems on dental porcelain and their reliability. Experimental groups were as follows; Group A Super Bond C&B, Group B Porcelain repair kit, Group C Ceramic repair, and Group D Spectrum system as a control. Porcelain disks were fired and embedded in epoxy resin. Porcelain surface were ground using 220 grit SiC disk, then cleaned in ultrasonic bath. Then porcelain specimens were treated with each repair system. A clear polystyrene cylinder 3.5 mm in internal diameter was filled with composite resin. Then the resin cylinder was polymerized with a visible light curing unit. Thirty one specimens at each group were prepared and stored at 37℃ distilled water for 48 h. Specimens were tested in an Instron testing machine according to ISO TR 11405. Mean shear bond strength and standard deviation of each group was 15.7±4.1 MPa (Group A), 12.8±4.9 MPa (Group B), 7.2±3.0 MPa (Group C) and 9.6±2.2 MPa (Group D). ANOVA and Tukey HSD post-hoc test showed that there were significant differences between groups (p<0.05). Data of bond strength were analyzed with two-parameter Weibull distribution. Confidence interval of Weibull modulus (m-parameter) at 95% of Group A (3.5-6.3) and Group D (3.6-6.0) were significantly higher than Group B (2.2-3.7) and Group C (2.0-3.4). There was little correlation between mean shear bond strength and Weibull modulus. Results indicated that acid-etching of porcelain surface increased porcelain-resin shear bonding strength.
|
|
|
KEYWORD
|
|
|
porcelain repair, shear bond strength, Weibull modulus
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|