Dental arch morphology of Mazahua and mestizo teenagers from central Mexico
2009
Aim: The aim of this study was to determine the morphologic
characteristics of the dental arches in the ethnic group "Mazahua" and
mestizo teenagers from central Mexico. Methods: A sample of 80
Mazahua and 80 mestizo teenagers with normal occlusion, divided into
two age groups, were evaluated. A digital caliper was used to measure
in cast models the intercanine width, intermolar width, length and
perimeter of the arch, occlusal intermaxillary curve (of Spee),
overjet, and overbite. A comparative analysis with Student’s
t-test was applied between gender and population groups. Results:
Comparison of the dental arches between Mazahua and mestizo teenagers
revealed that statistically significant differences existed with
respect to most of the measurements. In most cases, they were greater
in males; the Mazahua teenagers had intercanine and intermolar widths
greater than mestizo teenagers. Conclusions: Each group has a
characteristic dental arch form. The ethnic group Mazahua has squared
arches, whereas the mestizo teenagers have oval arches, which give them
their particular facial characteristics. These findings indicate that
population-specific standards are necessary for clinical assessments.
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