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目的:研究双垫矫治器对下颌后缩的矫治效果,探讨双垫矫治器在安氏Ⅱ类远中错(表现为下颌后缩的侧面貌)矫治中的作用。方法:选择2012年4月-2013年12月来口腔科门诊就诊的下颌后缩患者60例,按矫治方法的不同分为研究组和对照组,研究组用双垫矫治器矫治下颌后缩;对照组又按拔牙位的不同分为对照组一和对照组二,对照组一采取上颌拔除两个第二双尖牙而下颌不拔牙的固定矫治,对照组二采取上颌拔除两个第一双尖牙而下颌拔除两个第二双尖牙的固定矫治。结果:双垫矫治器有效前移下颌,使下颌功能性改建,获得良好的侧面貌。而对照组一拔除上颌两个第二双尖牙下颌不拔牙,经固定矫治后,下颌位置无改变,上颌因拔牙矫治而朝后缩一部分,彰显平直脸型,且面下三分之一短。对照组二拔除上颌两个第一双尖牙和下颌两个第二双尖牙,经固定矫治后,上下颌皆因拔牙矫治而略朝后缩,更加重了下颌后缩的面型,呈现衰老消瘦的面容。结论:双垫矫治器的应用,使下颌前伸,纠正下颌后缩,极大地矫正了面貌,重塑了颜面美观。
Objective: To study the effect of double-padded appliance on mandibular retrusion and to explore the effect of double-padded appliance on correction of Class Ⅱ distal malocclusion (manifested as mandibular rectum). Methods: From April 2012 to December 2013, 60 patients with mandibular retrusion who were referred to the department of stomatology were divided into study group and control group according to different treatment methods. The study group was treated with double pad appliance ; The control group again according to the different extraction position is divided into control group one and control group two, control group one to take the maxillary extraction two second pairs canines and mandibular non-extraction fixed fixation, control group two to take the maxillary extraction two first Bifid teeth and mandibular removal of the two second fixed teeth fixed. Results: Double pad appliance effectively move forward mandibular mandibular functional reconstruction, get good lateral appearance. The control group, the removal of the maxillary two second pairs of canines without extraction of the mandible, the fixed orthodontic treatment, the mandibular position unchanged, the upper jaw due to tooth extraction and regress part of the back, highlight the straight face, and the face of the third short . In the control group, the first two pairs of canines and the second two pairs of canines were removed in the control group. After fixed treatment, the upper and lower jaws slightly retracted due to tooth extraction treatment, which further emphasized the shape of the mandibular retrusion. Aging thin face. Conclusion: The application of double pad appliance enables mandibular anteversion and correct mandibular retrusion, which has greatly corrected the appearance and reshaped the facial appearance.