Calvert F J
Br J Orthod. 1982 Jul;9(3):149-53. doi: 10.1179/bjo.9.3.149.
The cephalometric radiographs of 29 Class II division 1 cases treated with the Andresen appliance were assessed and compared with those of 19 untreated Class II division 1 cases. The findings do not support the opinion that the Andresen appliance influences the growth of the skeletal structures of the maxilla and mandible. The overjet was reduced by lingual tipping of the maxillary incisors, whilst the overbite was reduced by increased eruption of both the maxillary and mandibular molars. Associated with this was a small improvement in molar relationship. The amount of lower incisor proclination was also small, presumably due to the effectiveness of the acrylic capping in controlling their axial inclination.
对29例使用安氏矫治器治疗的安氏Ⅱ类1分类病例的头影测量X线片进行了评估，并与19例未经治疗的安氏Ⅱ类1分类病例的头影测量X线片进行了比较。研究结果不支持安氏矫治器影响上颌和下颌骨骼结构生长的观点。覆盖减小是由于上颌切牙舌倾，而覆合减小是由于上颌和下颌磨牙萌出增加。与此相关的是磨牙关系有小幅改善。下切牙前倾的程度也较小，这可能是由于丙烯酸覆盖物在控制其轴倾方面的有效性。
