Vu Julius, Pancherz Hans, Schwestka-Polly Rainer, Wiechmann Dirk
J Orofac Orthop. 2012 May;73(3):225-35. doi: 10.1007/s00056-012-0077-0. Epub 2012 May 12.
The purpose of the present study was to examine the efficiency of correcting a Class II, Division 2 malocclusion using a completely customized lingual appliance.
In 18 consecutively completed, Class II, Division 2 malocclusion patients, the correction of the upper incisor inclination, deep and distal bite were assessed by means of plaster casts, digital lateral cephalograms, and intraoral photographs taken at the time of debond. Furthermore, two independent calibrated examiners determined the weighted Peer Assessment Rating index (PAR Index) of the initial and end models.
All Class II, Division 2 patients were treated successfully: upper incisor inclination using the palatal plane as a reference improved on average from 95.4° to 111.2°. The deep bite was reduced on average from 3.6 mm to 1.7 mm. Neutral occlusion was achieved in all patients who had undergone correction of an initially pronounced distal occlusion (4.5 mm on average). An 86.2% marked improvement was observed in the weighted PAR index score from an average of 24.7 at the beginning of treatment to 2.9 at the end of treatment, with no patient classified as "worse or no different."
Class II, Division 2 malocclusions can be efficiently and reliably treated by a combination of a completely customized lingual appliance and the Herbst device.
本研究的目的是检验使用完全定制的舌侧矫治器矫正安氏II类2分类错牙合的有效性。
在18例连续完成治疗的安氏II类2分类错牙合患者中，通过石膏模型、数字化侧位头影测量片以及拆除矫治器时拍摄的口内照片，评估上切牙倾斜度、深覆牙合及远中牙合的矫正情况。此外，两名独立的经过校准的检查者确定了初始模型和最终模型的加权Peer评估等级指数（PAR指数）。
所有安氏II类2分类患者均成功完成治疗：以上颌平面为参照，上切牙倾斜度平均从95.4°改善至111.2°。深覆牙合平均从3.6 mm减小至1.7 mm。所有最初有明显远中牙合（平均4.5 mm）的患者均实现了中性牙合。加权PAR指数评分从治疗开始时的平均24.7显著改善至治疗结束时的2.9，改善率为86.2%，且无患者被归类为“变差或无变化”。
安氏II类2分类错牙合可以通过完全定制的舌侧矫治器与Herbst矫治器联合使用得到有效且可靠的治疗。
