针道辅助固位金属翼板粘接桥的临床初步观察

Clinical observation of pin-ledge retained resin-bonded fixed partial denture

目的观察针道辅助固位金属翼板粘接桥修复的临床短期效果。方法对65例牙列缺损患者进行针道辅助固位金属翼板粘接桥修复，随访修复体固位和基牙健康状况。结果65例患者共制作74件修复体，随访6～34个月，平均12．4个月。3件修复体松动、脱落，脱粘率为4％。基牙牙本质敏感9例（14％）。结论针道辅助固位可显著提高金属翼板粘接桥的短期成功率，获得良好的临床效果。其长期成功率尚需进一步观察。

Objective To observe a short-term clinical effect of pin-ledge retained metal plate resin-bonded fixed partial denture （RBFPD）. Methods Sixty-five patients were restored with the pin-ledge retained metal plate RBFPD. Retention and marginal integrity of RBFPDs, secondary caries and mobility of abutments, and gingival bleeding index were clinically evaluated immediately after cementation and every 6-month period later. The parallel irradiating X-ray films were also taken to evaluate alveolar bone resorption. Results A total of 74 RBFPDs were made for all 65 patients. The mean follow-up period was 12.4 months. There were three RBFPDs debonded and the debonding rate was 4%. Nine patients had abutment dentin sensitivity after restoration （ 14% ） with a mean duration of 6. 3 months. Conclusions The pin-ledge retention form could increase the short-term survival rate of the RBFPD obviously and obtain favorable clinical effects.