Herbst矫治器治疗年轻成人安氏Ⅱ类2分类错的研究

Treatment of Class Ⅱ division 2 malocclusion with Herbst appliance in young adults

目的评价Herbst矫治器治疗年轻成人安氏Ⅱ类2分类错的疗效。方法对12名安氏Ⅱ类2分类错的年轻成人患者,采用铸造夹板式Herbst矫治器及固定矫治器矫治,通过X线头影测量比较矫治前后有关指标的变化并进行统计分析。结果矫治后SNA、Co-Go、Go-Po变化无统计学意义,SNB增加,ANB减小,上下前牙唇倾,上磨牙后移,下磨牙升高并前移,下颌平面、平面顺时针旋转。患者矫治后前牙达到浅覆、浅覆盖关系,磨牙达到中性关系。结论年轻成人安氏Ⅱ类2分类错可通过铸造夹板式Herbst矫治器结合固定矫治器获得满意的效果。

Objective To evaluate the effects of angle Class II division 2 malocclusion treated with Herbst appliance in young adults. Methods Cast splint Herbst appliance and multi-bracket appliance were used to treat 12 patients with Class II division 2 malocclusion aged from 16 to 25 years old. The lateral cephalograms were measured with Winceph 8.0 software and statistical analysis was carried out by SPSS 13.0 software. Results The changes in SNA, CoGo, Go-Po after treatment had no statistical significance （P〉0.05）. The SNB increased and ANB decreased after treatment. Upper and lower incisors labially inclined and inter-incisor angle increased. Upper posterior teeth had distal movement, lower posterior teeth had mesial movement and extrusion. Mandibular plane angle and occlusal plane angle had clockwise rotation. The overbite decreased significantly, and the molar relationship changed from Class II to Class I in all patients. Conclusion Herbst appliance combined with multi-bracket appliance can be used effectively for correcting Class II division 2 malocclusion in young adults.