Evaluation of the effects of the Incisal capping twin block on the flaring of the lower incisors in the treatment of skeletal Class II malocclusion

A. A. Elabd, M. Tawfik, A. Hafez
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Abstract

: Objective: The purpose of this research was to evaluate the effect of the incisal capped Twin Block on the proclination of the lower incisors in the treatment of skeletal class II malocclusion. Materials and Methods: Ten patients (age ranged from 9 to 14 y) with skeletal class II due to mandibular retrusion were selected and treated with the incisal capped Twin Block appliance. Overjet was more than 4 mm. Lateral cephalometric radiographs, photographs, and study casts were obtained before and after treatment. The collected data were analyzed using (SPSS) program for Windows (Standard version 26). The treatment duration was about 8-12 months. Results: Incisal capped TB appliance had Dentoskeletal and soft tissue effects including non-significant effect on the maxillary growth, significant advancement of the mandible, increase in the posterior and total anterior facial height, decrease in the overjet and overbite, retroclination of the upper incisors, significant proclination of the lower incisors and improvement of the soft tissue profile. Conclusions: The incisal capped Twin Block appliance was effective in the correction of skeletal class II patients. It produced a combination of skeletal and dental effects by forward movement of the mandible, palatal tipping of the upper incisors and labial flaring of the lower incisors. The addition of the acrylic capping to the lower incisors did not control the position of the lower teeth and did not prevent their labial flaring.
门牙盖双挡块治疗骨性ⅱ类错牙合中下门牙外展的效果评价
目的:本研究的目的是评价在治疗骨性II类错牙合时,采用带盖双牙块对下切牙前倾的影响。材料与方法:选择10例因下颌骨后缩导致的骨骼ⅱ类患者(年龄9 ~ 14岁),采用带切帽的Twin Block矫治器进行治疗。覆盖厚度超过4毫米。治疗前后均获得侧位头颅x线片、照片和研究模型。收集的数据使用Windows (Standard version 26)的SPSS程序进行分析。治疗时间约8-12个月。结果:牙盖结核矫治器对上颌生长无明显影响,对下颌骨有明显的前移,提高了后面和全前面高度,减少了覆盖和复咬合,使上切牙后倾,使下切牙前倾,改善了软组织轮廓。结论:切牙带帽Twin Block矫治器对骨ⅱ类患者有较好的矫治效果。它通过下颌骨的向前运动,上门牙的腭尖和下门牙的唇展来产生骨骼和牙齿的综合影响。在下门牙上添加丙烯酸盖并不能控制下牙的位置,也不能防止下牙的唇裂。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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