A comparison of skeletal, dentoalveolar and soft tissue characteristics in white and black Brazilian subjects

Abstract

ObjectiveThis study aimed to compare skeletal, dentoalveolar and soft tissue characteristics in white and black Brazilian subjects presenting normal occlusions.Material and MethodsThe sample comprised the lateral cephalograms of 106 untreated Brazilian subjects with normal occlusion, divided into two groups: Group 1- 50 white subjects (25 of each gender), at a mean age of 13.17 years (standard deviation 1.07); and Group 2- 56 black subjects (28 of each gender), at a mean age of 13.24 years (standard deviation 0.56). Variables studied were obtained from several cephalometric analyses. Independent t tests were used for intergroup comparison and to determine sexual dimorphism.Resultsblack subjects presented a more protruded maxilla and mandible, a smaller chin prominence and a greater maxillomandibular discrepancy than white subjects. Blacks presented a more horizontal craniofacial growth pattern than whites. Maxillary and mandibular incisors presented more protruded and proclined in black subjects. The nasolabial angle was larger in whites. Upper and lower lips were more protruded in blacks than in whites.ConclusionsThe present study found a bimaxillary skeletal, dentoalveolar and soft tissue protrusion in black Brazilian subjects compared to white Brazilian subjects, both groups with normal occlusion. Upper and lower lips showed to be more protruded in blacks, but lip thickness was similar in both groups.

The facial profile in brazilian adults

“…The difference was attributed to the early maturation of girls and their increased nose growth compared to boys. Freitas et al 19 also found different results in white Brazilians with normal occlusion (E-LS = -4.23mm), and although a sample of adolescents was used, the results were similar to those found in this study.…”

“…Nobuyasu et al 20 in evaluating Brazilian individuals aged between 12 and 15 years with normal occlusion also found more protruded lower lips (-0.95mm ± 2,37mm). Freitas et al 19 found -1.96mm for E-LI in white Brazilian adolescents with normal occlusion. However, the nose and chin positions were not evaluated separately, and those with a more developed nose and chin can provide a good aesthetic appearance due to their greater labial protrusion 21 .…”

“…One must also take into account each individual's ascendency 19,25 , as there are differences in dentofacial relationship depending on the ethnic variability of each racial group 19 .…”

“…The authors consider a limitation of this study the fact that the ancenstry of each individual included in the sample was not determined and evaluated as there are differences in the dentofacial relationship depending on the ethnic variability of each racial group 19,25 .…”

Avaliação cefalométrica da morfologia craniofacial em crianças e adolescentes HIV positivos

“…Os padrões de crescimento craniofacial variam de acordo com a idade, o sexo e a raça (Siqueira et al, 1999;Patil;Mody, 2005;Beugre et al, 2007;Veyre-Gouletet al, 2008;De Freitas et al, 2010;Gu et al, 2011;Janson et al, 2011;Vela et al, 2011;Yadav et al, 2011).…”