冠延长术在前牙桩核冠修复失败后的临床应用

摘要

20 subjects with tooth defect 3 nun below gingival margin underwent surgical crown lengthening SCL) after complete periodental non-surgical treatment. Probing depth(PD) and sulcus bleeding index(SBI) were measured before and after operation. PD decreased 2 weeks after operation (P < 0.05), PD values were not statistically different between 2 and 4 or 4 and 6 weeks after operation (P > 0.05). SBI decreased step by step 2-6 weeks after operation(f <0.05). 6 weeks after SCL gingival margin was stable, Dowel crown was restored and satisfied results were obtained.%纳入20例牙体缺损达龈下(≤3 mm)修复失败的前牙,经完善牙周基础治疗后行冠延长术,记录术前、术后2、4、6周牙周袋探诊深度(PD)、龈沟出血指数(SBI).PD值术后2周减小(p＜0.05),术后2、4、6周间差异无显著性(p＞0.05)；SBI值术后减小,2周与术前、术后4、6周差异存在显著性(p＜0.05).术后6周龈缘位置相对稳定,此时行桩核冠修复,成功率较高.牙冠延长术可提高残根的修复质量和效果.