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目的评价后牙定向骨凿在拔牙术的分牙(劈冠和分根)操作中的临床可行性及其优势性。方法对301颗均存在邻牙阻力和/或牙根骨阻力的各类患牙,随机采用后牙定向骨凿(试验组)或普通骨凿(对照组)的拔牙器械行分牙操作,以术前预测与术中操作结果的完全一致视为成功标准,从智齿邻牙阻力劈冠、错位牙邻牙阻力劈冠、后牙牙根骨阻力分根三方面获取研究数据,进行统计学分析。结果试验组(后牙定向骨凿)和对照组(普通骨凿)在智齿邻牙阻力劈冠和后牙牙根骨阻力分根中的差异,以及二组总差异中均有统计学意义(P<0.05)。结论后牙定向骨凿在分牙(劈冠和分根)操作中的精确度优于普通骨凿,值得临床推广。
Objective To evaluate the clinical feasibility and superiority of posterior incision osteotome in the operation of decorating teeth (split crown and root). Methods A total of 301 teeth with adjacent tooth resistance and / or resistance to the root of the teeth were randomly divided into two groups. Tooth extraction was carried out using either a posterior teeth-oriented osteotome (experimental group) or an ordinary osteotome (control group) The complete agreement between the predictive value and the result of intraoperative operation was regarded as the standard of success. The data were obtained from three aspects: the wisdom tooth orthodontic resistance split crown, the dislocation orthodontic tooth resistance split crown root and the posterior teeth root resistance root split, and statistical analysis was made. Results There were significant differences in the differences between the wisdom tooth orthodontic resisting split crown and the posterior deciduous root resisting root dentition in the experimental group (posterior teeth oriented osteotome) and the control group (general osteotome), and in the total difference between the two groups (P <0.05). Conclusions The accuracy of posterior teeth-oriented osteotome in the operation of decorating the teeth (splitting the crown and dividing the root) is superior to that of the ordinary osteotome and is worthy of clinical promotion.