title: The Carabelli trait in the mixed deciduous and permanent dentitions of five South African populations.
abstract: The Carabelli trait in South African negroids, caucasoids, Coloured (Peninsula and Namaqualand) and Indians, classified according to Alvesalo, Nuutila and Portin (1975; Acta odont. scand. 33, 191-197) showed generally peak frequency of expression for dm2 falling into class 3 and for M1 into class 4, that dm2 displays more negative expression (class 2 and 3) and M1 more positive expression (class 4 and 5) and that overall expression in dm2 is higher than in M1. The Indian group was an exception with peak frequencies in class 2 for dm2 and class 1 (right) and class 2 (left) for M1. There was no sex dimorphism and there was a tendency for concordance of expression between sides but not within sides.
authors.forename: C J
authors.initials: CJ
authors.lastname: Thomas
authors.forename: T J
authors.initials: TJ
authors.lastname: Kotze
authors.forename: J M
authors.initials: JM
authors.lastname: Nash
mesh_terms: D002648:Child; D003818:Dentition, Mixed; D005260:Female; D006801:Humans; D008297:Male; D044469:Racial Groups; D012737:Sex Factors; D013019:South Africa; D014071:Tooth Abnormalities / Q000453:epidemiology / Q000235:genetics*