American University of Beirut Medical Center, Beirut, Lebanon.
Am J Orthod Dentofacial Orthop. 2010 Mar;137(3):401-11. doi: 10.1016/j.ajodo.2007.08.040.
This article describes the nonextraction treatment of a girl in the late mixed dentition with a severe arch-length deficiency. Rapid maxillary expansion and molar distalization were combined with a lip bumper in the mandible, followed by fixed appliances. Although the literature has reported a high rate of relapse with this method of treatment, excellent stability was achieved at 5 years 3 months posttreatment. The merits of extraction vs nonextraction treatment and stability are discussed.
本文描述了一位替牙晚期严重牙弓长度不足的女孩的非拔牙治疗。上颌快速扩弓和磨牙远移与下颌唇挡联合使用，然后使用固定矫治器。尽管文献报道这种治疗方法的复发率很高，但在治疗后 5 年 3 个月时仍取得了优异的稳定性。讨论了拔牙与非拔牙治疗和稳定性的优点。
