为了防止错误的拔除位置好的牙并设法保留错位的牙,避免患者承受额外的手术创伤及过高的正畸费用,本文作者探讨了定位阻生尖牙的各种方法,包括视诊、触诊,并且着重讨论了X线片定位方法(定位阻生尖牙的方法也同样适用于其它的阻生牙)。 定位方法包括:视诊及触诊,观察阻生尖牙是否引起相邻侧切牙唇舌向移位,唇侧异位尖牙压迫牙根使侧切牙牙冠唇向错位,腭侧异位尖牙使侧切牙牙冠腭向错位。若未萌尖牙位置不正常或未被触及时,需要作X线检查,用视差法,即通过球管的移动引起要定位 In order to prevent the wrong removal of well-positioned teeth and to try to retain the misaligned teeth and to prevent the patient from receiving additional surgical trauma and excessive orthodontic costs, the authors examined various methods of positioning impacted canines, including visual examination, touch The clinic also focused on X-ray positioning methods (the method of positioning impacted canines is equally applicable to other impacted teeth). Positioning methods include: visual inspection and palpation to observe whether the incisors can cause adjacent lateral incisors labial shift, labial hypothalamic canine root pressure to the lateral incisor crown dislocation, palatal ectopic canine to lateral incision Dental crown palatal dislocation. If not canine position is not normal or not touched, the need for X-ray examination, with the parallax method, which is caused by the movement of the tube to be positioned