The use of physiologic changes of teeth is comparatively definite to estimate age for old people who had stoped the growth and development. Among many physiologic indicators, tooth arttritions is visible to naked eye and does not need any damage
of
submect and has close relationship to age. the author examined tooth attritions and dental restorations of 229 subjects, and degrees of the attrition of all teeth was judged 5 categories according to the method by Takei.
Multivariate analysis was applied for the Mathematico-Statistical means. The results were as follows:
1. Four calculators for age estimation by attrition value were given in case that 28 all teeth were used, and 14 maxillary teeth were sued, and 14 mandibular teeth were used, and maxillary and mandibular 14teeth were used.
2. Partial correlation coefficients of each tooth were calculated in order to show that which tooth is more contributive to age estimation. In case that the 28 all teeth were used 2nd premolar was the most contributive to age estimation and 1st
molar,
incisor 2nd molar, lateral incisor, canine, 1st premolar, respectively.
3. For more accurate age estimation, calculator by 28 teeth is recommendable to person who has comparatively more dental restoration, and calculator by maxillary and mandibular 14 teeth is recommendable to person who has less dental restoration
and
missing tooth.
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