安徽医科大学学报
安徽醫科大學學報
안휘의과대학학보
ACTA UNIVERSITY MEDICINALIS ANHUI
2014年
5期
673-675
,共3页
改良pendulum摆型%牙性安氏域类错牙合%远移上颌磨牙%非拔牙矫正
改良pendulum襬型%牙性安氏域類錯牙閤%遠移上頜磨牙%非拔牙矯正
개량pendulum파형%아성안씨역류착아합%원이상합마아%비발아교정
the modified pendulum%Angle classII malocclusion%the distalization of maxillary molars%unextracted orthodontics
选择年轻恒牙牙合牙性安氏域类错牙合21例,使用改良pendulum摆型远中移动上颌磨牙3.2~5.7个月,平均4.38个月。改良pendulum摆型远中移动上颌磨牙前后拍摄X线头颅定位侧位片,对于前后的变化采用配对t检验。侧位片上显示每侧平均开出7.31 mm的间隙,上颌第一磨牙后移占间隙的64.8%,牙冠向后倾斜平均为18.64o,平均每月后移率为1.27 mm。上颌第一磨牙平均压低0.69 mm,上颌前磨牙平均伸长1.02 mm,面下1/3平均增加2.19 mm。上颌中切牙平均增加3.39o的唇倾和切端平均增加1.13 mm的唇展。
選擇年輕恆牙牙閤牙性安氏域類錯牙閤21例,使用改良pendulum襬型遠中移動上頜磨牙3.2~5.7箇月,平均4.38箇月。改良pendulum襬型遠中移動上頜磨牙前後拍攝X線頭顱定位側位片,對于前後的變化採用配對t檢驗。側位片上顯示每側平均開齣7.31 mm的間隙,上頜第一磨牙後移佔間隙的64.8%,牙冠嚮後傾斜平均為18.64o,平均每月後移率為1.27 mm。上頜第一磨牙平均壓低0.69 mm,上頜前磨牙平均伸長1.02 mm,麵下1/3平均增加2.19 mm。上頜中切牙平均增加3.39o的脣傾和切耑平均增加1.13 mm的脣展。
선택년경항아아합아성안씨역류착아합21례,사용개량pendulum파형원중이동상합마아3.2~5.7개월,평균4.38개월。개량pendulum파형원중이동상합마아전후박섭X선두로정위측위편,대우전후적변화채용배대t검험。측위편상현시매측평균개출7.31 mm적간극,상합제일마아후이점간극적64.8%,아관향후경사평균위18.64o,평균매월후이솔위1.27 mm。상합제일마아평균압저0.69 mm,상합전마아평균신장1.02 mm,면하1/3평균증가2.19 mm。상합중절아평균증가3.39o적진경화절단평균증가1.13 mm적진전。
21 classII malocclusion adolescents (9 boys and 12 girls) were selected as the subjects, aged from 10.6 to 14.5 years, and the initial mean age was 12.8 years. All were treated with the modified Pendulum appli-ance. The duration for distalization of maxillary molars was from 3.2 to 5.7 months (4.3 months on average). Lat-eral cephalograms were obtained before and after distalization. Changes produced by the modified Pendulum appli-ance were analyzed with paired t tests. The mean space opening on lateral cephalograms was 7.31 mm, and maxil-lary first molar distalization accounted for 64.8% of the space,with a mean distal crown tipping of 18.64o. The rate of molar movement was 1.27 mm per month. The maxillary first molars intruded 0.69 mm,and the premolars extru-ded 1.02 mm. Lower anterior facial height increased 2.19 mm. The maxillary incisors had increased 3.39oof labial tipping and 1.13 mm of protrusion.