牙冠延长术用于劈裂牙修复中的临床研究  

Clinical study of broken tooth restored with crown lengthening surgery

作　　者：周娟[1] 杜姗姗[1] 解龙川[1] 罗志晓[1] 柴红波[1] 

机构地区：[1]湖北医药学院附属太和医院,湖北十堰442000

出　　处：《现代中西医结合杂志》2011年第12期1442-1444,共3页Modern Journal of Integrated Traditional Chinese and Western Medicine

摘　　要：目的评价牙冠延长术在劈裂牙修复中的临床效果。方法对38例43颗劈裂牙,按断端位于龈下最深距离分为A组(24颗患牙,1 mm<距离<3 mm)和B组(19颗患牙,3 mm≤距离≤4 mm),均采用牙冠延长术暴露龈下牙体断面,术后6周行桩冠修复。分别记录手术前后菌斑指数(PLI)、龈沟出血指数(SBI)、牙周探诊深度(PD)和牙齿松动度,观察临床疗效。结果 2组术后6周牙体断端均暴露较好、龈缘颜色正常,A组无松动,B组8例(42%)出现Ⅰ度松动。术后6个月A组无松动,修复效果满意;B组9例(47%)出现Ⅰ度松动,修复效果欠佳。2组修复效果比较有显著性差异(P<0.01)。术后各阶段2组PLI、SBI、PD均明显优于术前(P均<0.05),但组间比较无显著性差异(P>0.05)。术后2组修复有效率100%;A组满意率100%,B组53%。结论牙冠延长术能重建劈裂牙的生物学宽度,有利于劈裂牙的保存和修复,但要严格把握临床适应证。Objective It is to evaluate the clinical effect of crown lengthening surgery on restoration of broken tooth. Methods 43 teeth from 38 patients with subgingivally involved defect were divided into two groups： group A（24 teeth,1 mmdepth3 mm）,Group B（19 teeth,3 mm≤depth≤4 mm）.All teeth were treated by crown lengthening first and then accepted crown prosthesis at 6 weeks postoperatively.The PLI,SBI,PD and odontoseisis degree of pre-and post-operative were recorded,and the clinical effect was observed. Results After 6 weeks,the teeth sections of two groups were exposed well and the color of gingival margin of two groups looked normal,there was no tooth loosed in Group A and were 42% teeth with loose at degree I in Group B.After 6 months,there was no tooth in Group A,the effect was satisfactory;and there were 47% teeth with loose at degree I,the effect wan not satisfactory.There was significant difference between both groups（P〈0.01）.Postoperative PLI,SBI and PD were better than those preoperatively（P〈0.05）,but there was no significant difference between both groups（P〉0.05）.The effective rate was 100 % of both groups,and satisfactory rate was 100% in Group A and 53% in Group B. Conclusion Crown lengthening surgery can rebuild the biological width of broken teeth;it is a good method for the protection and restoration of broken tooth,but should be strictly grasped the clinical indication.

关 键 词：牙冠延长术 劈裂牙 龈下 生物学宽度 

分 类 号：R781.05[医药卫生—口腔医学]