Evaluation of facial morphology and sagittal relationship between dental arches in primary and mixed dentition.

Objective: To assess facial morphology (Pattern) and sagittal relationship between dental arches (Class), and establish a potential association between them and the variables sex, age and ethnicity, among schoolchildren aged between 4 and 9 years old (mean age of 6.7 years) in primary and mixed dentitions.

Methods: The sample comprised 875 children (457 males and 418 females) attending schools in Descalvado, São Paulo, Brazil.