牙冠延长术在残根残冠治疗中的疗效分析

目的 观察牙冠延长术在残根、残冠保留治疗中的临床效果.方法 收集因龋坏、牙折等所致牙齿断面位于龈下的残根、残冠30颗,随机分成两组,分别应用牙龈切除术及牙冠延长术进行修复前的牙龈外科处理.结果 所有患牙龈下断端在术后即刻均得以暴露.两组术后1周术区龈缘均轻度水肿,2周明显好转.冠延长术组术后6周龈缘外形良好,术后6月基本恢复正常,断端平齐龈缘或位于龈缘冠方;术后各时间点牙周状况均有明显改善.牙龈切除术组术后6周～6月部分患牙龈下断端被牙龈覆盖;术后2～6周牙周状况有所改善,但术后6月龈沟出血指数加重明显.结论 牙冠延长术较牙龈切除术更有利于残根残冠的保存和修复,但要注意适应证的选择.

Clinical effect of crown lengthening surgery on the residual root and crown

Objective To explore the clinical effect of treatment methods to restore the residual crown and root.Methods We collected 30 residual crown and roots teeth whose profile are located in the subgingival due to caries and tooth fracture.Then we randomly divided them into two groups,Gingival excision and surgical crown lengthening were applied respectively for repair of anterior gingival surgery treatment.Results The teeth sections were exposed well immediately.The gingival of the two groups had mild edema 1 week after operation,then improved obviously after 2 weeks.In the surgical crown lengthening group the gingival margin was in good shape after 6 weeks,and the gingival was return to normal after 6 months.The periodontal status improved obviously at each time point after operation.Some teeth sections of the gingival excision group were covered by the gingival after 6 weeks to 6 months.The periodontal conditions improved after 2 to 6 weeks,but the gingival sulcus bleeding index increased obviously after 6 monthes.Conclusion Compared to gingival excision,crown lengthening surgery is more advantageous to the residual crown and residual root preservation and restoration,but the choice of indication should be carefully considered.