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目的观察改良式牙冠延长术保存斜折上中切牙的临床效果。方法选取2009年1月至2010年6月沈阳市口腔医院牙周科收治的因外伤致上中切牙斜折断端位于龈下的患者9例(12颗患牙),行改良式牙冠延长术并于术后2个月进行修复治疗,以恢复美观和功能。检查并记录术前及修复后6个月探诊深度(PD)、出血指数(BI)和牙齿松动度(M)。结果修复后6个月12颗患牙均未出现松动;11颗患牙PD为2～3mm,仅1颗患牙修复后PD仍为4mm;所有患牙均BI≤3。患者对修复后6个月的美观效果及功能均全部满意,美观和功能VAS平均值分别为9.75和9.50。结论改良式牙冠延长术可恢复丧失的生物学宽度,扩大常规牙冠延长术适应证,保留更多斜折的上中切牙。
Objective To observe the clinical effect of modified crown extended preservation of oblique incisor incisors. Methods From January 2009 to June 2010, 9 cases (12 teeth) with subgingival stenosis caused by trauma in Shenyang Stomatology Hospital were enrolled in this study. The modified crowns Surgery was performed at 2 months after surgery to restore the beauty and function. Preoperative and postoperative 6 months exploration depth (PD), bleeding index (BI) and tooth mobility (M) were recorded and recorded. Results There was no loosening of 12 teeth in 6 months after repair. PD of 11 teeth was 2 ~ 3mm, PD was still 4mm after restoration of only 1 tooth. BI≤3 in all affected teeth. The patients were satisfied with the aesthetic effect and function of the 6 months after repair, and the average values of beauty and function VAS were 9.75 and 9.50, respectively. Conclusions Modified crown extension can restore the loss of biological width, expand the indications of conventional crown extension, retain more oblique incision of the upper incisors.