Relation between Maximal Interincisal Distance and Age in Children and Adolescents.

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The relation between maximal interincisal distance and body height was investigated in children and adolescents aged 9, 12, and 15 for 3 consecutive years. They were students in Okazaki City, Aichi Prefecture. The number of subjects was 249 males and 265 females aged 9 years, 317 males and 258 females aged 12 years, and 135 males and 177 females aged 15 years. The results were as follows:<BR>1) The maximal interincisal distance was statistically significant in age and sex. (male: 9 years-48.4mm, 10years-49.5 mm, 11 years-50.6 mm, 12 years-51.5 mm, 13 years-52.0 mm, 14 years-53.6mm, 15 years-53.4 mm, 16 years-53.0 mm, and 17 years-55.2 mm; female: 9 years-46.4 mm, 10 years-46.4 mm, 11 years-48.1 mm, 12 years-48.8 mm, 13 years-47.4 mm, 14 years-48.8 mm, 15 years-47.6 mm, 16 years-47.1 mm, and 17 years-47.9 mm)<BR>2) Longitudinal changing pattern of maximal interincisal distance showed significant difference between male and female.<BR>3) Maximal interincisal distance and body height increased with age in male.
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