• 대한치과보철학회지
• /
• 제56권4호
• /
• pp.269-277
• /
• 2018

목적: 본 연구는 글라스 용융침투 처리가 지르코니아와 초저온 소성 전장도재와의 전단결합강도에 미치는 영향을 평가하였다. 재료 및 방법: 표면처리 방법에 따라 대조군 (처리 안함), ZirLiner처리군 (ZL군), 글라스 용융침투처리군 (ZG군), 글라스 용융침투 후 Sandblasting 처리군 (ZGS군)으로 분류하였다 (n = 12). 모든 실험군은 초저온 소성 전장도재를 사용하여 지름 6 mm ${\times}$ 두께 3 mm가 되도록 축성하고 소성하였다. 지르코니아와 전장도재 사이의 결합강도는 만능시험기를 이용하여 측정하였고 지르코니아 시편의 결합계면, 도재파절 양상은 SEM과 EDX로 관찰하였다. 결과: 지르코니아 표면처리 방법에 따라 전장도재와의 결합강도가 ZirLiner군, 대조군, 글라스 용융침투군 순으로 나타났으나 통계학적으로 유의한 차이는 없었다 (P > .05). 글라스 용융침투 후 Sandblasting 처리군은 다른 모든 군에 비해 유의하게 낮은 전단결합강도를 보였다 (P < .05). 결론: 글라스 용융침투 지르코니아의 Sandblasting처리는 초저온 소성 전장도재와의 현저한 결합력 감소를 야기시키므로 사용이 제한되어야 할 것으로 사료된다.

• 대한치과보철학회지
• /
• 제28권2호
• /
• pp.147-163
• /
• 1990

Although dental porcelain demonstrates lasting esthetic results, it suffers from inherent brittle fractures. Various techniques and materials for intraoral porcelain repair has been suggested. This study investigated the in vitro shear strength of three porcelain repair systems according to aspects of the porcelain fractures. The purpose of this study was to evaluate the shear bond strength of three porcelain repair systems(All-bond, Clearfil, Scotchprime) according to fractured surface of porcelain - fused - to - metal restorations. For this study specimens were divided into five groups : group 1 represented fracture occurred at body porcelain layer, group 2 represented fracture occurred at opaque porcelain layer, group 3 represented fracture including 1/3 of metal exposure, group 4 represented fracture including 2/3 of metal exposure, and group 5 represented all metal surface was exposed. Specimens were stored in double deionized water(24Hr, $37^{\circ}C$) and thermocycling was performed(24Hr, 1080cycles), and subjected to a shear force parallel to the repair resin and porcelain interface by use of an University Testing Machine. The results of this study were obtained as follows : 1. In group 1 and 2, bond strength was relatively high, and bond strength showing reducing tendency as exposure of metal was increased. 2. In group 1, bond strength was relatively high, and no significant differences in porcelain repair system. 3. In group 2, 3 and 4, All-bond and Clearfil provided significantly higher bond strength than scotchprime. 4. In group 5, bond strength was the lowest among all groups and especially in case if Scotchprime. 5. Cohesive failure was observed in group 1 and 2, adhesive failure was observed in group 5, and cohesive / adhesive failures were observed in group 3 and 4.