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[The observation of older teeth viewed from periodontics (author's transl)].

This study was observed about the attrition, gingival resession and coronal form toward the periodontal pocket on the 604 of older tooth above sixty two years old of the out patients in the dental clinic of Tokyo metropolitan gerontology center.The following statistic results were obtained.1. The attrition and gingival ression showed a definite relation.2. On the progressive degree, the attrition showed 58.9% on 2nd degree, 29.8% on 3rd degree and 11.3 on 1st degree. This degree were graded according to the method proposed by Ono, et al.3. The pocket development of older teeth was observed in case of sharped peak, marginal ridge in supraclusion and irregular contact surface than the marginal ridge are markedly worn.