Gonzales Paola Sampaio, Machado Carlos Eduardo Palhares, Michel-Crosato Edgard
Community Dentistry Department, School of Dentistry, USP- Universidade de São Paulo, São Paulo, SP, Brazil.
National Institute of Criminalistics, Brazilian Federal Police, Ministry of Justice, Brasília, DF, Brazil.
Braz Dent J. 2018 Nov-Dec;29(6):619-623. doi: 10.1590/0103-6440201802027.
The aim of the present study is to describe the simplified facial pattern of young Brazilian men and women using the facial index (FI), upper face index (UFI), and nasal index (NI) in indirect anthropometric measurements applied to frontal photographic images. The images were obtained from 660 adult white men and 689 adult white women aged 30 years ± 6 months, and classified according to regions of birth, as follows: south (S), southeast (SE), midwest (MW), northeast (NE), and north (N). The nasion, zygion, gnathion, stomion, subnasale, and alare landmarks were labeled on the images using the SAFF 2D® software. Based on the coordinates, the linear distances between the landmarks of interest were calculated and presented as indices. The analysis of variance and Student's t-test were used for assessing the regions of birth and gender, respectively. The collected data allowed obtaining the facial profile of the young adult Brazilian population. There were differences in the facial profiles between men and women and also between some regions, especially between the N and the other Brazilian regions (p<0.05). The UFI did not show a statistically significant difference (p>0.05) between genders for any of the regions. The discriminant analysis for gender assessment demonstrated higher accuracy when the three indices were analyzed together. In the decision tree for gender assessment, the NI showed better results than the other indices.
本研究的目的是通过应用于正面摄影图像的间接人体测量法，使用面部指数（FI）、上脸指数（UFI）和鼻指数（NI）来描述巴西年轻男性和女性的简化面部模式。这些图像取自660名30岁±6个月的成年白人男性和689名成年白人女性，并根据出生地区进行分类，如下：南部（S）、东南部（SE）、中西部（MW）、东北部（NE）和北部（N）。使用SAFF 2D®软件在图像上标记鼻根点、颧点、颌下点、口裂点、鼻下点和鼻翼点等标志点。根据坐标，计算感兴趣的标志点之间的线性距离，并以指数形式呈现。分别使用方差分析和学生t检验来评估出生地区和性别。收集的数据有助于获取巴西年轻成年人群的面部轮廓。男性和女性之间以及一些地区之间的面部轮廓存在差异，特别是北部与巴西其他地区之间（p<0.05）。对于任何地区，UFI在性别之间均未显示出统计学上的显著差异（p>0.05）。当一起分析这三个指数时，用于性别评估的判别分析显示出更高的准确性。在性别评估的决策树中，NI比其他指数显示出更好的结果。
