牙冠延长术保留残根的临床疗效观察

Clinical Observation on Retention of Residual Root and Crown Lengthening Surgery

目的观察牙冠延长术对牙体缺损至龈下的残根修复的临床疗效。方法对35颗牙体缺损至龈下1～3mm的单根牙的残根行牙冠延长术。根据牙根长度将35颗患牙分为A、B两组,A组20颗患牙,根长≥1.5cm,B组15颗患牙,1.2cm≤根长≤1.5cm。术后6周常规修复。比较术前、术后6周、修复后3个月的效果(包括牙周探诊深度PD和牙松动度ND)以评价临床疗效。结果 35颗患牙术后3个月牙周情况良好,A组术后无松动,B组术后33.33%出现Ⅰ～Ⅱ度松动,总有效率为(失败5例)85.72%。结论牙冠延长术有利于残根的保护和修复,是有效保留残根、残冠的一种最佳方法。但要注意适应证的选择。

Objective To observe the Crown lengthening on the tooth to the therapeutic effects of subgingival residual root.Methods 35 tooth to subgingival 1~3mm single rooted teeth residual root and Crown lengthening.Under root length 35 teeth into A and B two groups,A group of 20 teeth,root length≥1.5cm,B group of 15 teeth,1.2cm ≤root length ≤1.5cm.For 6 weeks after General repair.Comparison of preoperative and postoperative Mach results after 6 weeks,repair（Including periodontal probing depth,PD and loosening of teeth ND）to evaluate the clinical effects.Results 35 March after teeth week well,no loose after A group of B and postoperative 33.33% of Ⅰ~Ⅱ appears loose,total effective rate（failure of 5 cases） 85.72%.Conclusion Crown lengthening is conducive to the protection and restoration of residual root,is the effective retention of residual root and Crown of A best practice.But note that indication of choices.