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在生长过程中,下颌的旋转影响面部的垂直关系。本研究在于全面揭示在高角和低角病例中垂直距离的增长变化与下颌生长旋转的关系。 材料和方法 本研究测量了12岁儿童头影测量片中的MP-SN角大小,并设定MP-SN角≤26°为低角病例,≥35°为高角病例。每组由15名男孩和14名女孩组成。 垂直距离的生长变化可以在矢状轴和垂直轴上进行测量,它们分别为过S点与SN成8°角的水平线和过N点与此线垂直的线。 下颌生长旋转分为基质内旋转和基质旋转,前者
During growth, the mandibular rotation affects the vertical relationship of the face. This study is to fully reveal the relationship between the growth of vertical distance and the growth of mandibular growth in high-angle and low-angle cases. Materials and Methods This study measured the size of the MP-SN in a cephalometric measurement of a 12-year-old child and set MP-SN angles ≤26 ° for low-angle cases and ≥35 ° for high-angle cases. Each group consists of 15 boys and 14 girls. Vertical distance growth changes can be measured in the sagittal axis and the vertical axis, respectively, over the S point and SN at an angle of 8 ° horizontal line and over N points and this line perpendicular to the line. Mandibular growth and rotation into the matrix within the rotation and matrix rotation, the former