根向复位瓣在附着龈宽度不足患牙的牙冠延长术中的应用

Application of apically repositioned flap in crown lengthening surgery for the treatment of the teeth with inadequate width of attached gingiva

目的:评价根向复位瓣在附着龈宽度不足的患牙牙冠延长术中的应用效果。方法:纳入需行牙冠延长术但附着龈宽度不足的患牙17颗,术中采用根向复位瓣法对牙龈瓣进行复位,记录手术前和术后6个月龈缘到牙体断端的距离、附着龈的宽度等指标并进行比较和评价。结果:术前17颗患牙牙体缺损边缘均位于龈下,术后6个月16例(94.11%)缺损边缘均暴露在龈缘冠方,龈缘根向位移距离(3.88±0.49)mm;17颗患牙附着龈宽度术前为(2.35±0.61)mm,术后6个月为(2.65±0.49)mm(P>0.05)。结论:牙冠延长术可以有效暴露牙体缺损边缘,为牙体缺损创造修复条件,避免切除过多角化龈导致附着龈宽度变窄。

Objective： To evaluate the effects of crown lengthening surgery by apically repositioned flap for the treatment of the teeth with inadequate width of attached gingiva. Methods： 17 teeth with inadequate width of attached gingiva were included. The gingiva flap was repositioned apicaUy. The distance between gingival margin to the root surface was recorded, the width of attached gingiva and other indicators were compared before and 6 months after surgery. Results ： Edge of the defects the 17 teeth was below gingiva margin before surgery, root surface was exposed to the coronal gingival margin 6 months after surgery in 16 of the 17 cases （94.11%）. Api- cally displacement distance of the gingival margin was （3.88 ± 0.49 ） mm. The width of attached gingiva before and 6 months after sur- gery was （2.35 ± 0.61 ） mm and （2.65 ± 0.49 ） mm respectively （ P 〉 0.05 ）. Conclusion： Crown lengthening with apically reposi- tioned flap surgery can effectively expose the root surface and create conditions for restoration of dental defects for teeth with inadequate attached gingiva, and can prevent over removal of the keratinized gingiva.