Cerci V, Martins J E, de Oliveira M A
Orthodontic Department, Federal University of Rio de Janeiro, Brazil.
Int J Adult Orthodon Orthognath Surg. 1993;8(4):287-92.
Lateral cephalometric radiographs were obtained from 30 individuals that were equally divided into groups by gender. Their ages varied from 18 to 31 years. All were white Brazilians with normal dental occlusions and good facial profiles. A combination of angles and linear measurements from Steiner's and Downs' analyses were determined. Means and standard deviations were calculated for the sample. Student's t test did not show a statistically significant difference between men and women. The entire sample was compared with the North American standards reported by Steiner and Downs. Statistically significant differences were found for GoGn/SN and SND angles. The statistically greater values of 1/NA(mm), 1/NB(mm), and 1/NA(degrees) for the Brazilians indicate typical morphological aspects with protrusive incisors. These differences and the great variation within the sample should be taken into account when formulating an orthodontic treatment plan for Brazilians.
对30名个体拍摄了头颅侧位X线片，这些个体按性别平均分为两组。他们的年龄在18至31岁之间。所有个体均为巴西白人，具有正常的牙合关系和良好的面部轮廓。确定了Steiner分析法和Downs分析法中角度与线性测量值的组合。计算了样本的均值和标准差。学生t检验未显示男性和女性之间存在统计学上的显著差异。将整个样本与Steiner和Downs报告的北美标准进行比较。发现GoGn/SN和SND角度存在统计学上的显著差异。巴西人在1/NA(mm)、1/NB(mm)和1/NA(度)方面具有统计学上更大的值，表明其具有切牙前突的典型形态特征。在为巴西人制定正畸治疗计划时，应考虑到这些差异以及样本内的巨大变异性。
