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. An attempt was made with a view to establish a
potential association between children's morphological features with sex, age and
ethnicity. RESULTS: Descriptive analysis revealed a predominance of facial Pattern I (69.9 %) and
Class I (67.4 %). Statistical tests (p < 0.001) showed that
Class I was more frequent among Pattern I children, whereas Class II prevailed
among Pattern II, and Class III was frequent among Pattern I and III children.
Ethnicity was the only variable associated with facial pattern. CONCLUSIONS: Results suggest that facial pattern and sagittal relationship between dental
arches tend to be correlated. Ethnicity was associated with facial pattern, with
Pattern I being the most recurrent among Caucasians and facial Pattern II being
recurrent among Afro-descendant subjects.
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