LORENZI, Lígia Maria et al. Wylie-Johnson analysis of adolescents of Afro-Brazilian descent with normal occlusion: investigation of the mean values. []. , 62, 1, pp. 13-17. ISSN 1981-8637.

^len^aObjective The purpose of this study was to evaluate mean cephalometric measurements for a group of individuals of Afro-Brazilian descent using the Wylie-Johnson analysis, and to investigate the presence of sexual dimorphism.. Methods Thirty-six lateral radiographs of the head of African-Brazilians were used. Subjects were 10 to 14 years old and had clinically normal occlusion, all permanent teeth, and no history of orthodontic treatment. Results Results for girls and boys were, respectively: SNA 88.31º and 89.68º; SNB 83.96º and 85.01º; ANB 4.44º and 4.69º; 1:1= 118.18º and 116.51º; FG-ST 16.47 mm and 16.12 mm; ST-Pmf 19.69 mm and 19.88 mm; Pmf-ANS 53.69 mm and 54.84 mm; Pmf-1ºMS 21.83 mm and 20.64 mm; FG-Pg 108.19 mm and 108.45 mm; FPL -MPL 27.48º and 27.65º; TAFH 111.06 mm and 112.26 mm; UAFH 45.26 mm and 45.38 mm; LAFH 65.80 mm and 66.88 mm; FG-FPL 1.069 mm and -2.086 mm; MBL 70.24 mm and 69.67 mm; MRH 51.89 mm and 53.70 mm; gonial angle 129.27º and 129.28º. Results of Student's-t test (a=5%) did not show any sexual dimorphism. Results of descriptive statistics were similar for the individuals of Afro-Brazilian descent in the study. Conclusion Individuals of African descent had bimaxillary protrusion, a more acute interincisal angle, a larger inferior facial height, and a markedly convex profile.^lpt^aObjetivo Avaliar as medidas cefalométricas médias para um grupo de indivíduos melanodermas usando a análise de Wylie & Johnson e também investigar a presença de dimorfismo sexual. Métodos Foram usadas 36 telerradiografias em norma lateral de indivíduos melanodermas, entre 10 e 14 anos de idade, com oclusão clinicamente normal, todos os dentes permanentes e sem histórico de tratamento ortodôntico. Resultados Os resultados para os sexos feminino e masculino foram respectivamente: SNA = 88,31ºe 89,68º; SNB = 83,96ºe 85,01º; ANB = 4,44ºe 4,69º; 1:1= 118,18ºe 116,51º; FG-ST = 16,47mm e 16,12mm; ST-Fpm = 19,69mm e 19,88mm; Fpm-Spna = 53,69mm e 54,84mm; Fpm-6 = 21,83mm e 20,64mm; FG-Pg = 108,19mm e 108,45mm; PlF.PlM = 27,48º e 27,65º; AFAT = 111,06mm e 112,26mm; AFAS = 45,26mm e 45,38mm; AFAI = 65,80mm e 66,88mm; FG-PlF = -1,069mm e -2,086mm; Go-Me = 70,24mm e 69,67mm; Con-Go = 51,89mm e 53,70mm; Gon = 129,27 e 129,38. A análise estatística descritiva dos dados mostrou homogeneidade entre os mesmos. Não foi observado dimorfismo sexual (teste t de Student, α=5%). Conclusão Os dados sugerem que os indivíduos melanodermas estudados apresentam biprotrusão maxilar, ângulo interincisal mais agudo, altura facial inferior maior e perfil convexo acentuado.

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