摘要
目的比较Herbst矫治器双期拔牙矫治与单纯拔牙矫治恒牙期AngleⅡ1类下颌后缩伴牙列拥挤患者的矫治效果。方法各选15例FG-G期恒牙期AngleⅡ1类下颌后缩伴牙列拥挤患者,分别作为Herbst双期拔牙组(Herbst组)和单纯拔牙组(对照组);Herbst组经金属铸造夹板式Herbst矫治器矫治后,立即拔除4个第一双尖牙接受方丝弓矫治技术完成二期矫治;对照组拔出4个双尖牙行方丝弓技术矫治;通过X线头影测量方法评价两组疗效。结果两组患者前牙覆牙合覆盖明显减小,后牙达中性关系;Herbst组患者下颌体、下颌支、下颌总长度均显著大于对照组,颏前点前移使SNB角显著增大,ANB角显著减小;U1/L1角增大与U1/SN的减小在对照组显著;Herbst组L1/MP角在矫治前后显著减小,而对照组减小不明显;对照组下颌平面角显著增大;Herbst组软组织测量显示面凸角、全面凸角显著增大。结论Herbst矫治器双期拔牙矫治对恒牙期AngleⅡ1类下颌后缩伴牙列拥挤的矫治具有显著疗效,面型的改善比单纯拔牙矫治更明显。
Objective To evaluate the skeletal and dental changes for crowded class Ⅱ division 1 malocclusion and mandibular retrusion in permanent dentition extraction treatment with two- phase. Methods The investigation involved 15 patients treated with Herbst appliances followed by comprehensive edgewise therapy in which was 4 teeth were extracted and the first was premolar and 15 patients treated by edgewise were extracted four premolars. The lateral eephalometrie analysis was used to evaluate the effects. Results All subjects achieved to Class I molar relationships. The eephalometries results showed Co-Pg. Go-Pg and Co-Go increased significantly in Herbst group. Mandibular orthopedic effects resulted in an increase in SNB and a decrease in ANB. U1/SN and U1/L1 angle increased more in control group than in Herbst group, and L1/MP angle decreased significantly in Herbst group. Soft tissue profile convexity angle increased significant for crowded class traction treatment st group. Conclusion It is achieving a satisfied effect of facial profile for crowded class Ⅱ division 1 malocclusion and mandibular retrusion in permanent dentition extraction treatment with two-phase.
出处
《江西医学院学报》
CAS
2008年第2期73-75,80,共4页
Acta Academiae Medicinae Jiangxi
