三种桩核系统修复后牙残冠的3年回顾性研究

A three-year retrospective study on three kinds of posts and cores in residual posterior crowns

目的比较三种桩核修复后牙残冠的临床效果。方法收集2006年1月至2006年12月行桩核修复的共144颗患牙,分成三组:纤维桩核组(56颗),铸造桩核组(54颗),银汞桩核组(34颗),所有患牙行完善根管治疗后,采用桩核系统恢复基牙外形,三组均用烤瓷全冠修复,对所有病例进行追踪随访1年和3年,观察三组患牙的3年成功率。结果纤维桩组3年成功率为90.74,铸造桩核组为89.29,银汞桩核组为61.76,三组3年成功率差异有统计学意义(P<0.05),两两统计学分析显示:铸造桩核组与纤维桩组3年成功率无明显差异(P>0.05),但分别与银汞桩核组有明显差异(P<0.05)。结论临床在选择桩核系统时,应优先考虑纤维桩,但若残留牙体组织较少桩核固位力较差时可考虑使用铸造金属桩核,银汞桩核虽操作简便,但失败率均高于前者,选用时应慎重。

Objective To investigate the clinical effect of endodontically treated residual posterior crowns restored directly or by fiber post and core or by cast metal post and core or by amalgam post and core. Methods One hundred and forty-four teeth were selected and randomly divided into group （54 teeth） with fiber post and core （FBC）, group （56 teeth） with cast metal post and core （CMPC）, and group （34 teeth） with amalgam post and core （APC）. The appearance of abutment tooth was restored by the post-core system, and the porcelain fused to metal crown was reconstructed. All the patients were followed up for 3 years. Results The three-year success rate of three groups were as follows： FBC group： 90.74%, CMPC group： 89.29%, APC group： 61.76%. There were significant differences among three groups （P〈0.05）, and the two-two comparisons analysis showed that there were significant differences both between FBC group and APC group and between CMPC group and APC group, while there were no significant differences between FBC group and CMPC group. Conclusion Fiber post should be preferred in the three kinds of posts, cast metal post should be preferred in teeth with serious defect, and amalgam post has a high failure rate.