下颌前突患者多为前牙反(牙合),替牙期即有明显表现,可由多种因素引起.治疗以使下颌后退为主.现介绍一种简易有效的方法:利用成品铝合金牙弓夹板结扎颌间牵引,并借助塑料联冠斜面导板打开(牙合)锁关系,即可在短期内取得较满意效果.1 资料与方法1.1 临床资料 替牙期安氏Ⅱ类错(牙合)患者21例,其中男8例,女13例,均伴前牙反(牙合).年龄8～13岁,平均10 Most patients with mandibular prognathism of the anterior teeth (Occlusals), the period of significant performance that may be caused by a variety of factors. Treatment to the mandibular retreat. Now introduce a simple and effective method: the use of finished aluminum alloy teeth Arch ligation intermaxillary intermaxillary traction, and with the plastic crown crown bevel guide open (occlusion) lock relationship, you can get more satisfactory results in the short term .1 Materials and Methods 1.1 Clinical data for Class II malocclusion period (occlusal ) 21 patients, including 8 males and 13 females, all with anterior crossbite (occlusion) .Ages 8 to 13 years old, with an average of 10