Dental arch dimensions in the mixed dentition: a study of Brazilian children from 9 to 12 years of age
AUTOR(ES)
Louly, Fabiane, Nouer, Paulo Roberto Aranha, Janson, Guilherme, Pinzan, Arnaldo
FONTE
Journal of Applied Oral Science
DATA DE PUBLICAÇÃO
2011-04
RESUMO
OBJECTIVE: This study evaluated dental arch dimensional changes of Brazilian children. MATERIAL AND METHODS: Dental casts were taken from 66 children (29 males; 37 females) with normal occlusion selected among 1,687 students from public and private schools aged 9, 10, 11 and 12 years, according to the following criteria: Class I canine and molar relationships; well-aligned upper and lower dental arches; mixed dentition; good facial symmetry; no previous orthodontic treatment. Dental arch dimensions were taken by one examiner using the Korkhaus' compass and a digital pachymeter. ANOVA test was applied to compare the arch dimensions at the different ages and the t-test was used to compare the arch dimensions of male and female subjects. Arch forms were compared by means of chi-square tests. RESULTS: Only the maxillary anterior segment length showed a statistically signifcant increase from 10 to 12 years of age. Males had a signifcantly larger maxillary depth than females at the age range evaluated. The predominant dental arch form found was elliptical. CONCLUSIONS: In the studied age range, anterior maxillary length increased from 10 to 12 years of age, males had larger maxillary depth than females and the predominant arch form was elliptical.
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