改良摆型在牙性安氏域类错牙合中远移上颌磨牙对牙槽和
颌骨的影响
张晓光;唐旭炎;沈军
【期刊名称】《安徽医科大学学报》 【年(卷),期】2014(000)005
【摘要】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.%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,
改良摆型在牙性安氏域类错牙合中远移上颌磨牙对牙槽和颌骨的影响
