贴面烤瓷与牙齿粘接强度实验及其临床应用

EXPERIMENT OF BOND STRENGTH BETWEEN VENEER PORCELAIN AND TEETH AND CLINICAL APPLICATION OF PORCELAIN LAMINATE VENEERS

目的：评价贴面烤瓷与牙齿粘接强度的影响因素和烤瓷贴面修复效果。方法：采用新鲜的人离体牙，对不同条件下贴面烤瓷与牙齿的粘接强度进行测试；临床上，对３６例患者１３８颗美观欠缺的牙齿采用烤瓷贴面修复，临床观察６～１８个月。结果：酸蚀的贴面烤瓷的粘接强度明显大于无酸蚀者，在统计学上差异有显著性（Ｐ＜００５），使用硅烷的贴面烤瓷粘接强度大于无使用者，但在统计学上差异无显著性（Ｐ＞００５）；临床修复效果的满意率达９３５％。结论：使用酸蚀剂和硅烷偶联剂都能提高贴面烤瓷的粘接强度，但酸蚀剂起主要作用。烤瓷贴面的临床应用能达到满意的牙科美容效果。

Objective: To evaluate the influence factors of bond strength between veneer porcelain and teeth and restorative effects of porcelain laminate veneers. Methods: Bond strength were measured in different conditions between veneer porcelain samples and fresh extracted teeth. Clinically, 36 cases with defect of dental appearance were treated with 138 porcelain laminate veneers and were followed up 6～18 months. Results: The bond strength of etched porcelain surfaces was greater than that of non etched ones, and the difference was statistically significant (P<0 05). Use of silane yielded higer bond strength than the non use, but the difference was not statistically significant (P>0 05). In clinical aspect, the porcelain veneers accomplished 93 5% of esthetic goals. Conclusions:Both etching of porcelain surface and use of silane yield higher bond strength, but the etching is the chief factor. The satisfatory restorative goals of porcelain veneers can be attained clinically.