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The present study was designed to elucidate the relationship between lively elderly and dental status including biting force. The lively elderly examined were selected on the basis of the following it...ems: 1) People over 65 and less than 80 years old living in Kasuga-shi at present. 2) People without any subjective and objective diseases. 3) People with high social activities. 4) People recommended as being lively physically and mentally by the district senile clubs. The number, sex and mean age of the subjects were 39 (male 20, female 19) and 73.3 years old. Edentulous rate, number of present and intact teeth, and maximum biting force were examined in the study and compared with the authorized Japanese average value of the items matched age of the subjects (1981) reported by Ministry of Health and Welfare, Japan. The results obtained are as follows: 1. The edentulous subjects rate was 20.5% in the lively elderly, and almost half (p<0.01) of the Japanese average (39.1%). 2. Number of the present teeth per person was 13.0+-9.3 (mean+-S.D.) in the lively elderly and about double (p<0.001) of the Japanese average (6.8). 3. Number of intact teeth per person was 5.8+-6.6 in the lively elderly and about double (p<0.05) of the Japanese average (2.8). 4. Significant correlations were found between the maximum biting force and the present (r=0.599, p<0.01) and the intact (r=0.431, p<0.05) teeth. These results shows that numbers of both present and intact teeth were closely related to liveliness in the elderly. Therefore, it was suggested that prevention of dental diseases plays an important role on the increase of lively elderly in the society.続きを見る
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