缺损至龈下的双尖牙残根的两种修复方法比较研究

Comparison of the two methods of prosthodontics in subgingival residual root of premolar

目的对缺损至龈下的双尖牙残根分别采用单冠和联冠修复,比较两种方法的疗效。方法选择128例折断或继发龋坏至龈下的双尖牙牙根,进行完善的根管治疗和成品螺纹桩加树脂堆塑成核后,随机分为A,B两组,A组行烤瓷单冠修复,B组选邻牙一颗行烤瓷联冠修复。结果2年后复查时,两组成功率差异有统计学意义,B组成功率高于A组。结论联冠修复缺损至龈下的双尖牙残根效果优于单冠修复。

Objective To compare the efficacy of simple porcelain fused to metal crown with combined crown in restoration of subgingival residual root of premolar.Methods 128 eases of subgingival residual root of premolar due to fracture or secondary caries were randomly divided into two groups（A and B） .After having been conducted with endodontic therapy and restored with prepared metal screw post and resin core , the group of A was restored with simple porcelain fused to metal crown, the group of B was restored with combined crown. Results There is significant difference between tow groups after the observation of two years.The success rate of B is higher than A group. Conclusion Combined porcelain fused to metal crown to the subgingival root of the premolar is more effective than simple crown.