前牙残根牙冠延长术后冠修复的临床效果评价  

Evaluation on Clinical Effects of Crown Lengthening during Repairing Residual Roots of Anterior Teeth

作　　者：陈丽娟[1,2] 朱亚桥[3] 吕杰[4] 宋亚玲[1] 

机构地区：[1]武汉大学口腔医学院牙体牙髓科,湖北武汉430079 [2]惠州市口腔医院牙体牙髓科 [3]惠州市口腔医院牙周科 [4]惠州市口腔医院修复科

出　　处：《口腔医学研究》2013年第10期932-935,共4页Journal of Oral Science Research

基　　金：惠州市科技计划项目(编号:2013Y110)

摘　　要：目的:评价前牙区残根行牙冠延长术后全冠修复的临床效果,并分析主要的影响因素。方法:对21例患者共72颗前牙残根行牙冠延长术,术后12周行桩冠修复,并记录术前、术后6周、术后12周、冠修复后1月、6月、12月的相关评价指数,包括龈沟出血指数(sulcus bleeding index,SBI)、菌斑指数(plaque index,PLI)、松动度(tooth mobility,TM)、延长出的冠高度及黑三角(black triangle,BT)发生率,进行统计学分析。结果:与术前相比,术后6周、12周患牙SBI,PLI均有显著改善(P<0.05);与术前相比,术后6周、12周患牙TM有显著增加(P<0.05);与术后2周比较,术后6周及术后12周时新延长出的冠高度均有显著差异(P<0.05);修复后患牙SBI、PLI有增高趋势,对比修复即刻,术后12个月时有显著差异(P<0.05);修复后患牙TM趋于稳定。修复后黑三角发生率逐渐下降,对比修复即刻,修复后6个月及修复后12个月时有显著差异(P<0.05)。结论:对于前牙残根采用牙冠延长术,能够获得足够的临床高度以满足修复体固位需求,结合桩冠修复是保留残根的有效方法。Objective： To evaluate the clinical effect of crown lengthening during repairing residual roots of anterior teeth, and to analyze the main influence factors. Methods： The present study enrolled 21 patients with 72 residual roots of anterior teeth. After finishing periodontal basic treatment and root canal treatment, we carried out crown lengthening surgery for these roots. Post-crown restoration was performed 3 months after the surgery. Indexes, including SBI, PLI, TM and the increased crown length, were examined and statistically analyzed for all cases be- fore surgery, 6 and 12 weeks after surgery, 1, 6 and 12 months after restoration. Results： Compared with the inde- xes before surgery, SBI and PLI at the 6th and 12th week after surgery was lower （P〈0.05）, but TM was higher （P〈0.05） ; crown length increased at the 2nd week after surgery, statistical difference was observed at the 6th and 12th week （P〈0.05）; After post-crown restoration, SBI and PLI showed a increasing trend, which presented a significant increase at the 12th month, but TM gradually showed a tendency of stability; The incidence of black triangle reduced.gradually after restoration, and the reduction was greater at 6 months （P〈0. 05） and 12 months （P 〈0.05） after restoration than immediately after restoration. Conclusion： With the limitation of this study, crown lengthening surgery combined with post-crown restoration is a feasible method to retain residual roots of anterior teeth with better clinical effects.

关 键 词：牙冠延长术 生物学宽度 牙本质肩领 黑三角 

分 类 号：R783.3[医药卫生—口腔医学]