论文部分内容阅读
目的:观察牙冠延长术用于残根残冠保留治疗的临床效果。方法:选择因龋坏、牙折等致牙断面位于龈下的残根残冠45例45牙,随机分成观察组23例23牙和对照组22例22牙。对照组和观察组分别采用牙龈切除术与牙冠延长术进行修复前的牙龈外科处理。于术前、术后即刻、术后1个月、术后3个月、术后6个月,观察两组龈袋探诊深度、龈沟出血指数及牙齿松动度等指标。结果:两组患牙龈下断端术后即刻均得以暴露;术后术区龈缘均轻度水肿,1个月后明显好转。(1)两组术后各时间节点龈袋探诊深度与术前比较,均差异显著(P<0.05);观察组术后3个月、术后6个月龈袋探诊深度,均显著小于同一时间节点对照组(P<0.05)。(2)两组术后各时间节点龈沟出血指数,均较术前显著改善(P<0.05);观察组术后3个月、术后6个月龈沟出血指数,较同一时间节点对照组改善更为显著(P<0.05)。(3)两组术后各时间节点分别与术前比较,牙齿松动度虽均有所增大,但差异不显著(P>0.05)。结论:牙冠延长术较牙龈切除术更有利于残根残冠的保存和修复。
OBJECTIVE: To observe the clinical effect of crown extension therapy for residual root and crown preservation. Methods: Forty-five 45 teeth of residual root canals located in the subgingival area caused by decayed caries and tooth folds were randomly divided into 23 cases of 23 teeth in the observation group and 22 cases of 22 teeth in the control group. The control group and the observation group were treated with gingival surgery before gingival excision and crown extension, respectively. The indexes of gingival pocket probing depth, sulcus bleeding index and tooth loosening degree were observed before operation, immediately after operation, 1 month after operation, 3 months after operation and 6 months after operation. Results: The subgingival fractures of the two groups were exposed immediately after surgery. The gingival margin of the two groups were mild edema after operation, and obviously improved after one month. (1) There was significant difference in the probing depth of gingival pocket between the two groups at each time point after operation (P <0.05). The probing depth of gingival pocket at 3 months and 6 months after operation in the observation group was significantly Less than the control group at the same time point (P <0.05). (2) The bleeding index of gingival sulcus in both groups at postoperative time was significantly improved compared with that before operation (P <0.05). The bleeding index at 3 months and 6 months after operation in the observation group was significantly higher than that at the same time point Group improved more significantly (P <0.05). (3) Compared with preoperative, the degree of dental mobility of the two groups was increased, but the difference was not significant (P> 0.05). Conclusion: Crown extension is more beneficial to the preservation and repair of residual canals than gingiva excision.