安氏Ⅱ类１分类错是临床常见的错畸形。通常采取拔牙或不拔牙方法矫治，拔牙矫治的模式多采用拔除或者进行矫治犤１犦，而非拔牙矫治的难点是间隙的获得，本文为１４例牙源性安氏Ⅱ类１分类患者采用上颌单颌拔除第一双尖牙进行矫治。现将治疗前后的X线头颅定位侧位片软硬组织线 Class Ⅱ Division 1 malocclusion is a common clinical malformation. Usually adopt the method of tooth extraction or no extraction, orthodontic treatment model using more removal or correction 犤 1 犦, rather than the difficulty of extraction treatment is the gap to obtain this article for 14 cases of odontogenic Class Ⅱ Division 1 patients with maxillary Single jaw removal of the first pair of canine teeth for correction. Now before and after treatment of the X-ray skull positioning lateral piece of soft and hard tissue line