CAJ | 학술논문

目的：观察分析安氏Ⅰ类双颌前突畸形矫治前后双平面的变化。方法采用直丝弓矫治技术对19例安氏Ⅰ类双颌前突畸形患者进行矫治，均拔除了第一双尖牙，对矫治前后的X线头颅侧位定位片进行前后平面等的测量，对结果进行统计分析。结果前平面（AOP-FH）矫治前为（10.50±2.59）°，矫治后为（13.18±4.21）°，差异有统计学意义（P＜0.05）。后平面（POP-FH）矫治前后差异无统计学意义（P＞0.05）。结论安氏Ⅰ类双颌前突畸形矫治后后平面较稳定，前平面发生较大变化，主要与上前牙内收，相对伸长有关。
목적：관찰분석안씨Ⅰ류쌍합전돌기형교치전후쌍평면적변화。방법채용직사궁교치기술대19례안씨Ⅰ류쌍합전돌기형환자진행교치，균발제료제일쌍첨아，대교치전후적X선두로측위정위편진행전후평면등적측량，대결과진행통계분석。결과전평면（AOP-FH）교치전위（10.50±2.59）°，교치후위（13.18±4.21）°，차이유통계학의의（P＜0.05）。후평면（POP-FH）교치전후차이무통계학의의（P＞0.05）。결론안씨Ⅰ류쌍합전돌기형교치후후평면교은정，전평면발생교대변화，주요여상전아내수，상대신장유관。
Objective To evaluate the change of the cant of the occlusal plane of the patients with class Ⅰbia-maxillary protrusion before and after orthodontic treatment. Methods Nineteen patients with classⅠbia-maxillary protrusion were extracted by 4 first premolars and treated with straight wire appliance. Pre-treatment and post-treat-ment lateral cephalograms of the patients were obtained and evaluated to determine the difference in the cant of the oc -clusal plane.Results The cant of anterior occlusal plane (AOP-FH)was (10.50 ±2.59)°before treatment,(13.18 ± 4.21 ) °after treatment, and the difference was significant ( P<0.05 ). The change of the cant of posterior occlusal plane(POP-FH)showed no statistical difference (P>0.05).Conclusion After treatment, the cant of posterior oc-clusal plane of the patients with classⅠbia-maxillary protrusion remain stable. But the cant of anterior occlusal plane become larger and this change have something to do with the lingual extrusion and relative elongation of upper teeth.