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目的比较改良牙冠延长术与正畸牵引+牙冠延长术对上前牙复杂根折的治疗效果。方法选取60颗牙体缺损达龈下4.0mm以上的具有保留价值的上颌前牙,随机均分为两组,每组30颗患牙,分别采用改良牙冠延长术和正畸牵引+牙冠延长术,分别记录术前、术后一周及修复后6个月的牙周探诊深度(PD)、龈沟出血指数(SBI)、牙齿松动度(TM),观察临床效果。结果两组病例术后及修复后PD、SBI明显改善,有显著性差异(P<0.05),组间比较,无显著性差异(P>0.05)。结论两种术式对上前牙复杂根折病例均能取得较好的治疗效果。
Objective To compare the therapeutic effect of modified crown extension and orthodontic traction + crown extension on the complex root fracture of anterior superior tooth. Methods Sixty maxillary anterior teeth with retained value above the subgingival gingival margin over 4.0 mm were randomly divided into two groups with 30 teeth in each group. They were treated with modified crown extension and orthodontic traction + crown (PD), sulcus bleeding index (SBI) and tooth mobility (TM) were recorded before operation, one week after operation and six months after repair. The clinical effect was observed. Results The postoperative and postoperative PD and SBI of both groups were significantly improved (P <0.05). There was no significant difference between the two groups (P> 0.05). Conclusion Both of the two procedures can achieve better therapeutic effect on complex root fracture cases of the anterior teeth.