Kurosawa Masahiro, Ando Katsuya, Goto Shigemi
Department of Orthodontics, School of Dentistry, Aichi-gakuin University, Nagoya, Aichi, Japan.
Am J Orthod Dentofacial Orthop. 2009 Feb;135(2):241-51. doi: 10.1016/j.ajodo.2006.09.059.
A 10-year-old girl with maxillary protrusion and crowding of the maxillary and mandibular anterior teeth was treated in 2 phases. In the first phase of treatment, maxillary anterior growth was restrained and mandibular anterior growth promoted for skeletal improvement. In the second phase, at age 13, 4 first premolars were extracted, and an edgewise appliance was used for alveolar improvement. Because the patient had a high mandibular plane angle with a large Frankfort-mandibular plane angle, special care was taken from the beginning to prevent mandibular clockwise rotation. The Frankfort-mandibular plane angle decreased 3.1 degrees at posttreatment. In addition to the skeletal changes, we obtained a favorable lateral profile. This was achieved by the alveolar changes from the lingual movement of the maxillary and mandibular anterior teeth, and the anterior growth of the nasal apex region. The occlusion was stable at the 38-month postretention follow-up.
一名患有上颌前突及上颌和下颌前牙拥挤的10岁女孩接受了两期治疗。在第一期治疗中，抑制上颌前部生长并促进下颌前部生长以改善骨骼情况。在第二期，13岁时拔除了4颗第一前磨牙，并使用方丝弓矫治器改善牙槽情况。由于患者下颌平面角较高，即法兰克福平面与下颌平面夹角较大，从一开始就特别注意防止下颌顺时针旋转。治疗后，法兰克福平面与下颌平面夹角减小了3.1度。除了骨骼变化外，我们还获得了良好的侧貌。这是通过上颌和下颌前牙舌向移动以及鼻根尖区域向前生长所导致的牙槽变化实现的。在保持治疗后38个月的随访中，咬合情况稳定。
