CAJ | 학술논문

目的：了解下颌前伸矫治器（MandibularProtractionAppliance,MPA）对AngleⅡ类错牙合的治疗效果。方法：选择13例AngleⅡ类错牙合病人，男6例，女7例，最大13岁，最小10岁，均为替牙晚期或恒牙早期。X线头影测量显示主要为下颌后缩及轻微上颌前突，左手腕片显示为生长发育高峰期或高峰前期，所有病人用下颌前伸矫治器进行治疗。结果：平均疗程5.6个月，X线头影测量结果主要为SNA增大，ANB减小，Go-Co增大，经统计学处理有显著差异；U1-L1、U1-NA（角度）、U1-NA(距离)、L1-NB（角度）、L1-NB(距离)均无明显改变。结论：下颌前伸矫治器治疗早期Angle二类错牙合可取得明显的骨骼改变。
목적：료해하합전신교치기（MandibularProtractionAppliance,MPA）대AngleⅡ류착아 합적치료효과。방법：선택13례AngleⅡ류착아 합병인，남6례，녀7례，최대13세，최소10세，균위체아만기혹항아조기。X선두영측량현시주요위하합후축급경미상합전돌，좌수완편현시위생장발육고봉기혹고봉전기，소유병인용하합전신교치기진행치료。결과：평균료정5.6개월，X선두영측량결과주요위SNA증대，ANB감소，Go-Co증대，경통계학처리유현저차이；U1-L1、U1-NA（각도）、U1-NA(거리)、L1-NB（각도）、L1-NB(거리)균무명현개변。결론：하합전신교치기치료조기Angle이류착아 합가취득명현적골격개변。
Objective:To investigate the effectiveness of the mandibularProtraction appliance in the treatment of class Ⅱ malocclusion.Methods:Thirteen class Ⅱ patients (aged 10～13 years,male 6,femal 7) with mandible retrusion and slight maxillary protrusion were included.Radiographs of the left hand and wrist showed the patients were at the pubertal or pre-pubertal stage.All the patients were treated with the mandibular protraction appliance.Resalts:The duration of treatment was 5.6 months on average.SNB increased,ANB decreased,ANS-Me and Go-Co increased.Which showed sygnificant difference by statistical analysis.Conclusions:The obvious skeletal change can be achieved with the mandibular protraction applicance treatment in early class Ⅱ malocclusion.