Fushima K, Kitamura Y, Mita H, Sato S, Suzuki Y, Kim Y H
Department of Orthodontics, Kanagawa Dental College, Yokosuka, Kanagawa, Japan.
Eur J Orthod. 1996 Feb;18(1):27-40. doi: 10.1093/ejo/18.1.27.
In studying a group of fifty adult females with Class II division 1 malocclusion, it was evident that the skeletal problems of this malocclusion involved small, retruded mandibles accompanied by backward rotation. This skeletal pattern was considered to be influenced by the vertical dimension of the upper dentition in the buccal segment for mandibular function. The anterior and the posterior occlusal planes were examined to gain a detailed assessment of the relationship between the dental and the skeletal patterns. The findings indicated that the steep cant of the posterior occlusal plane was strongly correlated with the following: 1. Small, retruded mandible with backward rotation as the skeletal pattern. 2. Short vertical height of the upper second molars and distal inclination of the upper molars as the dental pattern. The increased vertical height of the lower second premolars was found to be related to backward rotation of mandible. In treating skeletal Class II malocclusions, this study indicated that control of the vertical dimension of the posterior teeth is extremely important.
在对一组50名安氏II类1分类错牙合成年女性的研究中，很明显这种错牙合的骨骼问题包括下颌骨小、后缩并伴有向后旋转。这种骨骼模式被认为受颊侧段上牙列垂直维度对下颌功能的影响。检查前牙合平面和后牙合平面，以详细评估牙型与骨骼模式之间的关系。研究结果表明，后牙合平面的陡峭倾斜与以下因素密切相关：1. 以小、后缩且向后旋转的下颌骨为骨骼模式。2. 以上颌第二磨牙垂直高度短和上颌磨牙远中倾斜为牙型。发现下颌第二前磨牙垂直高度增加与下颌骨向后旋转有关。在治疗骨骼型安氏II类错牙合时，这项研究表明控制后牙的垂直维度极其重要。
