Angle Orthod. 2020 May 1;90(3):457-466. doi: 10.2319/080218-561.1.
Maxillary canine and first premolar transposition is a complicated dental anomaly to treat, especially if the clinician's goal is to orthodontically move the canine into its normal position. Early diagnosis with cone-beam computed tomography simplifies the treatment of this pathology. This case report describes a patient with bilateral transposition, one complete and the other incomplete, involving the maxillary canine and the first premolar (Mx.C.1P). The orthodontic treatment involved the correction of both transpositions. In the complete transposition, the traction was mesial and upward to move the canine into a more apical position with a wider dentoalveolar process for easier crown interchange.
上颌尖牙和第一前磨牙转位是一种复杂的牙科异常，尤其是如果临床医生的目标是通过正畸将尖牙移动到正常位置。使用锥形束计算机断层扫描进行早期诊断可以简化这种病理的治疗。本病例报告描述了一名双侧尖牙和第一前磨牙（Mx.C.1P）完全和不完全转位的患者。正畸治疗包括纠正两种转位。在完全转位中，牵引力为近中向上，以使尖牙向更根尖的位置移动，同时具有更宽的牙牙槽突，以便更容易进行冠交换。
