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Frans_Jozef
Thursday, July 26th, 2007, 07:33 AM
Craniofacial differences between Japanese and British Caucasian females with a skeletal Class III malocclusion

Nobuyuki Ishii, Toshio Deguchi and Nigel P. Hunt



The racial differences in the craniofacial structures of 28 Japanese and 24 British Caucasian females with Class III malocclusions associated with a severe skeletal pattern were examined using lateral cephalograms. The mean age of the Japanese and Caucasian patients was 19.6 ± 3.5 and 20.2 ± 3.8 years (±SD), respectively. The mean values of 14 linear and 13 angular cephalometric parameters were compared between the two groups.
The results showed that the Japanese females had a significantly reduced anterior cranial base (P < 0.01), a more retrusive midfacial component (P < 0.05), and a significantly increased lower anterior facial height (P < 0.01) associated with a more obtuse gonial angle (P < 0.05) compared with the Caucasians. Analysis of the dento-alveolar component in Japanese patients indicated more proclined upper incisors (P < 0.01) compared with those of Caucasian subjects. The reduced anterior cranial base and midfacial component, and the high-angle facial pattern in the Japanese population, may be morphological features based on race, and these skeletal features seem to be less favourable for a skeletal Class III growth pattern compared with the Caucasian population.

http://ejo.oxfordjournals.org/cgi/reprint/24/5/493.pdf