Tooth loss, Osteoporosis and lifestyles in the age of 60-year-old

本研究以居住在日本山冈町和常滑市的老年人为研究对象，根据60岁以上居民的个人生活方式，探讨牙齿脱落（或保留牙齿数量）和骨质疏松症的发生情况。采用口腔科医生调查的个人过去生活方式和口腔健康状况调查表，将80、70、60岁人群的个人过去生活方式分为有一致或共同因素和无一致或共同因素两类。共同的因素是儿童时期的良好饮食，可能是20岁时的甜食牙龈肿胀和40岁和60岁女性的刷牙频率。另一方面，20岁时牙龈出血的因素，对于60岁和70岁的男性来说，零食摄入频率和40岁时有一个家庭牙医比80岁的男性更重要，而对于80岁和70岁的女性来说，儿童刷牙频率比60岁的女性更重要。60岁时喜欢甜食的因素在60岁和70岁女性中比80岁女性更重要。骨密度和咀嚼能力随保留牙数的增加而增加，尤其是女性。结论是，保留的牙齿数量反映了过去和现在适当的生活方式和饮食条件。

This study was nudertaken to discover whether tooth loss (or retained tooth number) and osteoporosis, according to individual lifestyles among generations of 60-year-old residents.The subjects were elderly persons living in Yamaoka-cho and Tokoname city in Japan. The subjects were survayd using a questionnaire on past individual lifestyles and oral health conditions inspected by dentists.The past in dividual 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-deciplined as children, likely sweets at the age of 20 gum swelling and tooth brushing frequency at the age of 40 and 60 in females. On the other hand, the factorts of bleeding from the gum 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 males than for 80-year-old males and the factors of brushing frequency as children was more important in 80 and 70-year old females 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. Bone density and masticable ability increa sed with numbers of retained tooth, particularly in female subjects. It was concluded that tooth numbers retained revealed proper lifestyles and dietary conditions in the past and present.