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目的:评价拔除下颌第一磨牙治疗错畸形的疗效。方法:根据拔牙方式将77例错畸形患者分为常规拔除第一前磨牙组30例、单侧拔除第一磨牙组27例和双侧拔除第一磨牙组20例;测量矫治前后OGS各指数变化情况并进行统计学分析。结果:3组正畸治疗后牙均有显著的改善(P<0.01),但3组的改变量无明显差异(P>0.05);3组正畸后OGS指数有显著差异(P<0.05),双侧拔除第一前磨牙组优于双侧拔除第一磨牙组(P<0.01),双侧拔除第一磨牙组优于单侧拔除第一磨牙组(P<0.01)。结论:拔除第一磨牙矫治能取得较好的矫治效果,但拔除第一前磨牙在后牙的矫治中效果更好。
Objective: To evaluate the curative effect of dislocation of mandibular first molar in the treatment of malocclusion. Methods: Totally 77 patients with malocclusion were divided into three groups: 30 cases of first premolar tooth group, 27 cases of unilateral first molar tooth group and 20 cases of bilateral first molars group. The changes of OGS index Changes and statistical analysis. Results: There was a significant improvement in the number of tibialis after orthodontic treatment (P <0.01), but there was no significant difference between the three groups (P> 0.05) ). The bilateral first molar removal group was better than the first molar removal group (P <0.01). The bilateral first molar removal group was superior to the unilateral first molar group (P <0.01). Conclusion: The removal of the first molars can achieve better results, but the removal of the first premolar is more effective in the correction of the posterior teeth.