Forsus促进骨性安氏Ⅱ类下颌生长的研究

Clinical Changes in Skeletal Class II Patients Treated with Forsus

目的:观察Forsus推杆式矫治器治疗青少年骨性安氏Ⅱ类1分类错的临床效果。方法:15例恒牙列初期骨性下颌后缩患者,应用标准直丝弓固定矫治加用Forsus推杆式矫治器,并于正畸治疗前、后拍摄X线头颅侧位定位片,取研究模型进行测量和统计学分析。结果:Forsus平均使用6.5个月,前牙覆覆盖明显减小,Ⅱ类磨牙关系矫治为Ⅰ类。矢状向变化为下颌骨生长及下前牙唇倾。垂直向变化为下面高增加,下磨牙伸长,上下平面角增加。横向上下颌牙弓宽度增加。结论:Forsus结合标准直丝弓治疗恒牙列初期骨性下颌后缩,可以促进下颌骨生长,部分改善及掩饰患者骨性不调。

Objective： To evaluate the clinical effects of Forsus fatigue resistant device in treatment of adolescences with skeletal mandibular retrusion.Methods： 15 patients were treated with straight wire appliance and Forsus.Pretreatment and post-treatment cephalometric radiographs were traced and analyzed while dental casts from different stages were measured.Results： During the average Forsus treatment time of 6.5 month,overbite and overjet were reduced notably.Moreover,Class I molar relationship was obtained.Sagitally,the mandibular skeletal advancement and lower incisors proclination were evident.Vertically,the enhanced lower face height was contributed by the mandibular molars eruption and the lower occlusion plane angle increase.Coronally,the width of both arches was expanded.Conclusion： Forsus appliance could achieve remarkable effects in class II patients at late growth stage by mandibular growth acceleration and lower incisors proclination.