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. 2011 Apr;19(2):169-74.
doi: 10.1590/s1678-77572011000200014.

Dental arch dimensions in the mixed dentition: a study of Brazilian children from 9 to 12 years of age

Fabiane Louly  1 , Paulo Roberto Aranha Nouer, Guilherme Janson, Arnaldo Pinzan
Affiliations

Dental arch dimensions in the mixed dentition: a study of Brazilian children from 9 to 12 years of age

Fabiane Louly et al. J Appl Oral Sci. 2011 Apr.

Abstract

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 significant increase from 10 to 12 years of age. Males had a significantly 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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Figures

Figure 1
Figure 1
Maxillary and mandibular dental width measurements: 1.intercanine distance; 2.inter-premolar distance; 3.first inter-molar distance; 4.dental arch total length; 5.anterior segment length; 6.posterior segment length
Figure 2
Figure 2
Maxillary depth
See this image and copyright information in PMC

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