CAJ | 학술논문

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。
목적：평개발제하합제일마아치료착！기형적료효。방법：근거발아방식장77례착！기형환자분위상규발제제일전마아조30례、단측발제제일마아조27례화쌍측발제제일마아조20례；측량교치전후OGS각지수변화정황병진행통계학분석。결과：3조정기치료후아！균유현저적개선（P＜0．01），단3조적개변량무명현차이（P＞0．05）；3조정기후OGS지수유현저차이（P＜0．05），쌍측발제제일전마아조우우쌍측발제제일마아조（P＜0．01），쌍측발제제일마아조우우단측발제제일마아조（P＜0．01）。결론：발제제일마아교치능취득교호적교치효과，단발제제일전마아재후아！적교치중효과경호。
Objective:To evaluate the therapeutic effects of orthodontic therapy with mandibular first molar extraction.Methods:77 cases of malocclusion were divided into 3 groups:Bilateral mandibular first premolar extraction group(A,30 cases),unilateral man-dibular first molar extraction group(B,27cases)and bilateral mandibular first molar extraction group(C,20 cases).The OGS indexes were measured before and after orthodontic treatment and statistically analysed.Results:Remarkable occlusal improvement was seen in all three groups after treatment(P<0.01 ),but the variation of OGS indexes had no significant difference among the 3 groups(P>0.05).OGS indexes among the three groups after treatment were significantly different(P<0.05).The improvement in group A was more significant than that in group C(P<0.01)and the improvement in group C was more significant than that in group B(P<0.01). Conclusion:Orthodontic therapy with bilateral mandibular first molar extraction is effective in orthodontic treatment of malocclusion, but is not as effective as that with bilateral mandibular first premolar extraction.