切牙单端铸瓷粘接桥的临床应用初探

Clinical application of anterior an-ceramic cantilevered resin-bonded fixed partial dentures

目的探索切牙单端铸瓷粘接桥的治疗方法，观察其临床效果，以期为单端粘接桥的临床应用提供参考。方法选择单颗切牙缺失病例10例，制作舌侧翼板固位的单端铸瓷粘接桥，共制作10件粘接桥，分别于修复后2周、1年、2年复查，复查内容包括：修复体折裂情况、边缘适合性、继发龋、颜色匹配性。结果10例患者平均观察14．7个月。10件单端铸瓷粘接桥均无支架及饰瓷折断、裂纹，无松动；10颗基牙和固位体边缘密合，无边缘着色，无继发龋；7例修复体颜色匹配为A级，3例修复体颜色匹配为B级。结论单端铸瓷粘接桥可修复单颗切牙缺失，牙体组织磨除量小，短期内临床效果良好，但其强度及粘接效果能否满足临床要求尚需进一步观察。

Objective To explore a fabricating method of incisor all-ceramic cantilevered resin- bonded fixed partial denture （RBFPD） and evaluate their clinical performances. Methods All-ceramic cantilevered RBFPDs were made to replace 1 missing incisor in each of 10 patients. The RBFPDs with lingual surface retainer were made of Empress Ⅱ ceramic materials and luted with resin cement. The prostheses were examined at 2 weeks, 1 year and 2 years after denture insertion. Examining criteria included ： fracture of bridge, marginal adaptation, secondary caries, and color match. Results The average follow-up period was 14. 7 months. No framework fracture and retainer debonding were observed and marginal adaptation was evaluated as good. Seven RBFPDs matched the color of adjacent teeth, and other three did not match well but within the acceptable range of tooth shade difference. Conclusions The results of this preliminary study suggest that the clinical performances of all-ceramic cantilevered RBFPDs are good in short-term evaluation, but their long-term success needs to be further investigated.