Effect of Surface Treatment of Porcelain on Tensile Bond Strength

도재의 표면처리가 인장접착강도에 미치는 영향

The purpose of this study was to evaluate the effect of surface treatment of porcelain on tensile bond strength. To accomplish this purpose, this study was carried out with 120 samples which were divided into 12 groups with each 10 samples, and the first group was not surface treated, groups 2 through 5 underwent single surface treatment, and groups 6 through 12 underwent compound surface treatment. The results were as follows : 1. In statistic, all the single surface-treated groups showed higher tensile bond strength than the non surface-treated group and the sandblasted group showed the highest tensile bond strength as $10.34{\pm}2.50MPa$. 2. All the compound surface-treated groups showed no noticeable difference in the tensile bond strength(9-11.5MPa). 3. In statistic, no significant difference was found between the sandblasted group and the compound surface-treated groups. 4. There was no fracture of porcelain while testing in this study. Above study demonstrated that compound surface treatment or sandblasing, if used single surface treatment, should be employed to guarantee successful clinical application.

본 연구의 목적은 도재의 표면처리가 인장접착강도에 어떠한 영향을 미치는가를 알아보는 것이었다. 120개의 도재시편을 각 군당 10개씩 12군으로 나눈 후, 1군은 표면처리를 하지않았고, 2군에서 5군까지는 단독 표면처리를 6군에서 12군까지는 복합으로 표면처리를 시행하였으며 그후 교정용 레진으로 통상적인 방법에 따라 브라켓을 접착하고나서 각 군의 인장접착강도를 측정하여 다음과 같은 결론을 얻었다. 1. 모든 단독표면처리군(G2,G3,G4,G5)은 표면처리를 하지않은 군(G1)보다 인장접착강도가 통계적으로 유의성 있는 증가(P<0.05)를 나타내었으며, 단독표면처리군 중 샌드블라스팅군(G5)의 인장접착강도가 $10.34{\pm}2.50MPa$로 가장 높았다. 2. 복합표면처리군(G6,G7,G8,G9,G10,G11,G12)에서는 9-11.5MPa의 인장접착강도를 나타내었고 이들 상호간에는 통계적으로 유의차가 없었다. 3. 단독표면처리군 중 샌드볼라스팅군(G5)은 복합표면처리군(G6-G12)과 통계적으로 유의차가 없었다.