近几年来后牙纵折数量增加,尤其在上颌第一磨牙最为常见,其程度往往使牙冠和髓室完全分开并伴有牙片错位,就诊时有时间久、暂时的咬折史及偏侧咀嚼史,临床上伴有牙周牙髓症状,对上颌第一磨牙完全性纵折的治疗,由于对牙髓的处理方法不同,疗效不一,争议 In recent years, the increase in the number of posterior teeth longitudinal fold, especially in the maxillary first molar is the most common, the degree of the crown and the pulp chamber is often completely separated and accompanied by dislocation of the teeth, when treatment for a long time, temporary bite history and partial Side chewing history, clinical periodontal endodontic symptoms, the treatment of maxillary first molar longitudinal fold, due to the different treatment of the pulp, with different effects, controversial