功能矫治器治疗三维方向错牙合畸形的研究

The effects of functional appliance and multi-bracket appliance on Class II malocclusion coupled with vertical and transversal problems

目的:评价功能矫治器治疗下颌后缩同时伴有垂直向、横向不调错畸形的疗效。方法:对20名下颌后缩同时伴有垂直向、横向不调错畸形的患者(平均年龄12.8岁)采用功能矫治器及固定矫治器双期矫治,通过X线头影测量比较矫治前、中、后有关指标的变化并进行统计分析。结果:所有患者功能矫治后,SNB增大(P<0.05),ANB减小(P<0.05),上磨牙压低并后移(P<0.05),下磨牙升高并前移(P<0.05)。双期矫治后,前牙达到正常覆覆盖关系,后牙达到中性关系或尖窝交错的咬合关系,下颌平面未发生明显的顺时针旋转,上下颌牙列矢状向、垂直向、横向关系协调。结论:采用功能矫治器双期矫治下颌后缩同时伴有垂直向、横向不调的错畸形,可获得满意的治疗效果。

Objective： To evaluate the effects of functional appliance and multi-bracket appliance on Angle Class II malocclusions coupled with vertical and transversal problems. Methods： Headgear-activator, Herbst appliance and multi-bracket appliance were used to treat 20 patients with Class II malocclusions coupled with vertical and transversal problems aged from 10 to 15 years. The lateral cephalograms were measured with Winceph 8.0 software and statistical analysis was carried by SPSS 13.0 software. Results： The sagi- tal, vertical, transversal problems had mainly been resolved at the end of functional appliance treatment. The SNB were increased（P 〈 0.05 ）, ANB were decreased（ P 〈 0.05 ）, upper posterior teeth were intruded and distally moved（ P 〈 0.05 ）, lower posterior teeth were extruded and mesialy moved （P 〈 0.05 ）. After multi-bracket appliance treatment, the anterior teeth achieved normal overbite and over- jet. The molar relationship changed from class II to class I. Mandibular plane angle was not clockwise rotated（ P 〉 0.05 ）. The upper and lower dentition were harmony in sagital, vertical and transversal. Conclusion： Functional appliance combined with multi-bracket appliance can be used effectively and conveniently for the treatment of Class II malocclusions coupled with vertical and transversal prob- lems.