Leonardi Rosalia, Licciardello Valeria, Greco Mariagrazia, Rossetti Bruno, Barbato Ersilia
Department of Surgery and Medicine, University of Catania, Catania, Italy.
World J Orthod. 2010 Summer;11(2):185-90.
Maxillary canines and first molars are the most common ectopic teeth in young people. Ectopic buccal eruption of maxillary canines is strongly associated with lack of space or crowding in the dental arch. This report demonstrates the management of a buccally erupted maxillary canine in an 11-year, 8-month-old boy without sufficient space. The patient had a mostly dental Class II occlusion and was in the late mixed dentition, and the root development of his canines was consistent with his dental age. To correct the distal occlusion and gain space in the maxillary arch for the eruption of both canines, the patient received cervical headgear. To guide the maxillary left canine into occlusion, it was surgically exposed and a modified utility arch inserted. The result of this approach proves that a custom-designed utility arch allows the distal movement of a buccally displaced canine, while at the same time increasing the maxillary arch length.
上颌尖牙和第一磨牙是年轻人中最常见的异位牙。上颌尖牙颊侧异位萌出与牙弓中空间不足或拥挤密切相关。本报告展示了一名11岁8个月大、牙弓空间不足的男孩颊侧萌出的上颌尖牙的治疗过程。该患者主要为安氏II类错牙合，处于混合牙列晚期，其尖牙的牙根发育与牙龄相符。为了纠正远中错牙合并在上颌牙弓中获得空间以使两颗尖牙萌出，该患者佩戴了颈带式矫治器。为引导上颌左侧尖牙咬合，对其进行了外科暴露并插入了改良的功能矫治弓。这种方法的结果证明，定制设计的功能矫治弓可使颊侧移位的尖牙远中移动，同时增加上颌牙弓长度。
