Denny John M, Weiskircher Mark A, Dorminey Jason C
University of Washington, USA.
Am J Orthod Dentofacial Orthop. 2007 May;131(5):670-8. doi: 10.1016/j.ajodo.2004.11.041.
Camouflage therapy is often the treatment of choice for Class II patients with mild to moderate skeletal discrepancies who seek treatment after growth modification is no longer possible. This case report describes the treatment of a 13.5-year-old girl with an orthognathic profile and a Class II Division 1 malocclusion, who had a thumb-sucking habit from ages 5 to 13. This resulted in an end-on molar relationship, a 2.0-mm anterior open bite, and 8.0 mm of overjet. She had protrusive maxillary incisors, mild anterior maxillary and mandibular crowding, and a 1.0-mm mandibular midline discrepancy. She also had a prominent chin button. After cessation of the habit, a Nance appliance was placed, the maxillary first premolars were extracted, appliances were placed, and orthodontic treatment began. The mandibular arch was leveled and aligned, and the maxillary anterior teeth were retracted in 2 stages to close the extraction sites and establish proper overbite and overjet. The maxillary molars were allowed to slip forward into a functional Class II occlusion, and the midline was corrected with interarch elastics. The final occlusal and esthetic results were stable and quite pleasing.
对于生长改良已不再可行后寻求治疗的轻度至中度骨骼差异的II类患者，掩饰性治疗通常是首选治疗方法。本病例报告描述了一名13.5岁女孩的治疗情况，该女孩具有正颌侧貌和II类1分类错牙合，5至13岁时有吮拇指习惯。这导致了磨牙终末关系、2.0毫米的前牙开牙合和8.0毫米的覆盖。她有上颌切牙前突、上颌和下颌前部轻度拥挤以及1.0毫米的下颌中线偏差。她还有一个明显的颏隆凸。在习惯戒除后，放置了Nance矫治器，拔除了上颌第一前磨牙，放置了矫治器，并开始正畸治疗。整平并排齐下颌牙弓，分两个阶段内收上颌前牙以关闭拔牙间隙并建立正常的覆牙合和覆盖。允许上颌磨牙向前滑动至功能性II类咬合，并用颌间弹力牵引纠正中线。最终的咬合和美学效果稳定且相当令人满意。
