Department of Orthodontics, Rio de Janeiro State University, Brazil.
Am J Orthod Dentofacial Orthop. 2012 Jan;141(1):105-12. doi: 10.1016/j.ajodo.2010.02.041.
The Tweed-Merrifield directional force technique is a useful treatment approach for a patient with a Class II malocclusion with dentoalveolar protrusion. The purpose of this case report was to present the diagnosis and treatment descriptions of a patient with an Angle Class II malocclusion complicated by tooth losses, severe dentoalveolar protrusion, and skeletal discrepancy. Treatment involved extraction of the maxillary first premolars, high-pull headgear to enhance anchorage, and high-pull J-hook headgear to retract and intrude the maxillary anterior segments. A successful outcome was achieved with traditional orthodontic treatment in this borderline surgical case.
特威德-米利菲尔德(Tweed-Merrifield)定向力技术是治疗安氏Ⅱ类错(牙合)伴牙性前突患者的一种有效方法。本病例报告的目的是介绍 1 例安氏Ⅱ类错(牙合)伴牙缺失、严重牙性前突和骨骼不调患者的诊断和治疗描述。治疗包括上颌第一前磨牙的拔除、头帽高位牵引以增强支抗、高位 J 钩头帽以远中、内收上颌前牙段。在这个边缘性手术病例中,传统的正畸治疗取得了成功的结果。