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目的:研究牙本质肩领对前牙残根残冠金属桩核修复疗效的影响。方法:选取2009年1月1日至2010年12月31日于我科就诊的前牙残根残冠患者87例,共计87颗患牙,按照牙体预备后各轴壁牙本质肩领的完整程度分为A组(一个轴壁有完整的牙本质肩领)、B组(两个轴壁有完整的牙本质肩领)、C(三个轴壁有完整的牙本质肩领)、D(四个轴壁都有完整的牙本质肩领)。所有病例均经过完善的根管治疗,行金属桩核冠修复后,随访4年后,对各组的治疗成功率(桩核未脱落)进行统计分析。结果:A组成功率13.3%,B组成功率52.9%,C组成功率87.1%,D组成功率95.8%。A、B组与C、D组之间的差异具有统计学意义(P<0.05),A组与B组之间的差异也具有统计学意义(P<0.05),C组与D组之间的差异不具有统计学意义(P>0.05)。结论:牙本质肩领的存在,对于前牙残根残冠桩核冠修复的远期效果,有重要作用。
Objective: To study the effect of dentin shoulder collar on the restoration of anterior mandibular residual crown metal post. Methods: Totally 87 patients with residual residual crown of anterior teeth treated in our department from January 1, 2009 to December 31, 2010 were enrolled. A total of 87 teeth were selected. The complete degree is divided into group A (a shaft wall has a complete dentin shoulder collar), group B (two shaft walls have complete dentin shoulder collar), C (three shaft walls have a complete dentin shoulder collar) D (complete dentin shoulder collar on all four shaft walls). All cases were underwent root canal therapy. After the restoration of the metal post and core crown, the success rate of treatment in each group (post core did not fall off) was statistically analyzed after 4 years of follow-up. Results: The success rate of group A was 13.3%, the success rate of group B was 52.9%, the success rate of group C was 87.1%, and the success rate of group D was 95.8%. The difference between group A and group C was statistically significant (P <0.05), and the difference between group A and group B was also statistically significant (P <0.05). The difference between group C and group D was statistically significant The difference was not statistically significant (P> 0.05). CONCLUSION: The existence of dentin shoulder collar plays an important role in the long-term effect of anterior residual root crown crown restoration.