上颌单颌拔牙矫治成人安氏Ⅱ~1错的回顾性研究

The retrospective study of treatment the adult Angle's classⅡdivisionⅠmalocclusion with the single maxillary extraction orthodontics

目的：探讨上颌单颌拔牙矫治成人安氏Ⅱ^1错[牙合]的适应症。方法：对治疗结束的16例上颌单颌拔除双侧第一前磨牙矫治的成人安氏Ⅱ^1错[牙合]病例，采用矫治前后照片、模型及X线头影测量对比分析的方法，进行回顾性研究评价其临床效果。结果：11例矫治效果令人满意，侧貌上唇前突明显改善，磨牙完全远中关系，尖牙中性关系，覆黯覆盖正常。结论：上颌牙源性前突、下颌拥挤≤4mm、前牙覆盖≤9mm及磨牙关系为远中尖对尖的安氏Ⅱ^1成人错[牙合]病例，应用单颌拔牙矫治可以取得满意效果。

Objective： To investigate the better indications of single maxillary extraction orthodontics used for the adult Angle＇s class Ⅱ division Ⅰ malocclusion. Method： 16 clap Ⅱ division Ⅰ adult patients were treated by single maxillary extraction orthodontics. The clinic material include photo,model and cephalometric before and after treatment were collected and evaluated. Result：The effect of 11 patients was satisfaction. The profile of up lip protrusion impressed significantly. Molar and canine relationship was whole distal and neutral respectively. The anterior overiet and overbite was normal. All of these cases had the similar clinic characteristic before treatment. Conclusion： It is easy achieving a satisfied effect for the adult Angle＇s class Ⅱ division Ⅰ malocclusion which characteristic was upper arch protrusion, anterior overiet not more than 9 mm, crowing of lower arch space analysis less than 4mm and molar relationship of beginning distal occlusion to use single maxillary extraction orthodontics.