Objective To investigate the clinical effect of crown lengthening surgery in the treatment of subgingival residual root and residual crown.Methods 80 cases of patients admitted to our hospital were analyzed, they were randomly divided into two groups. The control group used the gum excision treatment, the experimental group adopted surgical crown lengthening and root repair, treatment effects were compared between the two groups.Results The experimental group after the restoration of gingival pocket depth was 2.19 mm, the repair of one month after the depths of gingival pocket for 2.16 mm, 6 months after repairing gingival pocket depth of 2.14 mm were lower than the control group (2.79 mm, 2.66 mm, 2.61 mm) (P<0.05), after 1 months of gingival bleeding index was 0.8, crescent gingival bleeding index was 1.0 in postoperative 6 month, lower than that of the control group (P>0.05).Conclusion The residual root and residual crown of anterior subgingival has higher incidence, clinical use of crown lengthening surgery and radical ideal pipe repairthe therapeutic effect.%目的：探讨牙冠延长术及根管修复在前牙龈下残根及残冠中的临床治疗效果。方法对来我院诊治的80例患者入院资料进行分析，将其随机分为两组。对照组采用牙龈切除治疗，实验组采用牙冠延长术及根管修复治疗，比较两组治疗效果。结果实验组修复后龈袋深度为2.19 mm、修复后1个月龈袋深度为2.16 mm、修复后6个月龈袋深度为2.14 mm，均低于对照组（分别为2.79 mm，2.66 mm，2.61 mm）（P＜0.05）；术后1个月牙龈出血指数为0.8，术后6个月牙龈出血指数为1.0，低于对照组（P＜0.05）。结论前牙龈下残根及残冠发生率较高，临床上采用牙冠延长术及根管修复治疗效果理想。
展开▼
