Avaliação comparativa do padrão de normalidade do perfil facial em pacientes brasileiros leucodermas com norte o americano / Standard profiles normality comparative study between caucasian brazilian measures and north american measures

AUTOR(ES)

Gustavo de Almeida Camargo Lautenschläger

DATA DE PUBLICAÇÃO

2008

RESUMO

Considering that modern orthognatic surgery is mainly concerned in planning and diagnosing clinical cases by the use of patientssoft tissue measurements obtained from digital images employed in planning software, the aim of this study is to establish Caucasian Brazilians measures and to compare them to the standard North American measures. For this, a total of 60 Angles class I patients not previously submitted to orthodontic treatment and presenting harmonious facial features were invited to participate in the study as volunteers. The patients were initially photographed in frontal and lateral views and, afterwards, cephalograms were obtained. The images were digitized, adjusted and indexed in Dolphins image software. In order to procede cephalometric analysis, a total of 16 soft tissue profile points and 22 hard tissue profile points were demarcated, accordingly to North American original measurements used in Dolphins digital image program. After, all cephalograms were again evaluated to determine intra-examiner error according to paired Students t test. Mean and standard error measures were obtained and compared to American measures by unpaired Students t test with 95% confidence level. The results obtained have shown that all measurements, except for four points in male and four points in female, are significantly different (p <0.05) between Brazilian and American samples. Datas show that Brazilianssoft tissue profile is almost completely different from North Americans, with a less protrusive face, shorter chin projection and a more convex profile. This suggests the necessity of performing some changes in numerical values to obtain an ideal diagnosis and planning of orthognatic surgery in Caucasian Brazilians.

ASSUNTO(S)

cirurgia bucal orthodontic treatment cephalometric ortodontia facial form face computer assisted surgery software

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