Department of Pediatric Dentistry, Orthodontics and Community Health, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil.
J Appl Oral Sci. 2011 Apr;19(2):118-24. doi: 10.1590/s1678-77572011000200007.
The objective of this study was to compare the skeletal, dental and soft tissue characteristics of Caucasian and Afro-Caucasian Brazilian subjects with normal occlusion and to evaluate sexual dimorphism within the groups.
The sample comprised lateral cephalograms of untreated normal occlusion subjects, divided into 2 groups. Group 1 included 40 Caucasian subjects (20 of each sex), with a mean age of 13.02 years; group 2 included 40 Afro-Caucasian subjects (20 of each sex), with a mean age of 13.02 years. Groups 1 and 2 and males and females within each group were compared with t tests.
Afro-Caucasian subjects presented greater maxillary protrusion, smaller upper anterior face height and lower posterior face height, larger upper posterior face height, greater maxillary and mandibular dentoalveolar protrusion as well as soft tissue protrusion than Caucasian subjects. The Afro-Caucasian female subjects had less mandibular protrusion and smaller total posterior facial height and upper posterior facial height than males.
Brazilian Afro-Caucasian subjects have greater dentoalveolar and soft tissue protrusion than Brazilian Caucasian subjects, with slight sexual dimorphism in some variables.
本研究旨在比较正常牙合的白人和非裔巴西人受试者的骨骼、牙齿和软组织特征，并评估组内的性别二态性。
本研究的样本包括未经治疗的正常牙合受试者的侧位头颅侧位片，分为 2 组。第 1 组包括 40 名白种人受试者（男女各 20 名），平均年龄为 13.02 岁；第 2 组包括 40 名非裔巴西人受试者（男女各 20 名），平均年龄为 13.02 岁。使用 t 检验比较组 1 和组 2 以及每组内的男性和女性。
非裔巴西人受试者的上颌突出度较大，上前部颜面高度和下部后颜面高度较小，上部后颜面高度较大，上颌和下颌牙牙槽突突度以及软组织突度较大。非裔巴西女性受试者的下颌突度较小，总后颜面高度和上部后颜面高度较小。
巴西非裔巴西人受试者的牙牙槽突和软组织突度大于巴西白种人受试者，一些变量存在轻微的性别二态性。
