Abstract
This study was undertaken to discover whether retained tooth numbers according to individual lifestyles among different generations of 60 to 80-year-old persons. The subjects were 319 elderly persons living in Tokoname City and Yamaoka-cho in Japan. The subjects were surveyed using a questionnaire on past individual lifestyle and oral health condition inspected by dentists. The results are as follows. The past individual lifestyles were divided into two kinds : one had consistent or common factors, and the other not, among 80, 70, and 60-year-old generations. The common factors were being well-disciplined as children, liking sweets at the age of 20, gum swelling and tooth brushing frequency at the age of 60 in male subjects, and gum swelling at the age of 40 and 60 in females. On the other hand, the factors of bleeding from the gums at the age of 20, frequency of snack intake and having a home dentist at the age of 40 were more important for 60-and 70 year-old moles than for 80-year-old males and the factors of brushing frequency as children was more important in 80-and 70-year-old femoles than in 60-year-old females and the factors of liking sweets at the age of 60 was more important in 60-and 70-year-old females than in 80-year-old females.
