Co-relation between Tooth loss and trend of health status in the elderly

本研究以日本兵库县N町1068名老年人为研究对象，调查了14%的老年人牙齿数量在20颗以上，40%的老年人牙齿全部脱落。其中64%的人接受医疗护理，2%的人足不出户。在进食和日常生活的限制，在那些保留20个或更多的牙齿比缺牙的人少。在生活质量和社会活动的自我评价中，保留20颗或更多牙齿的人比无牙老人更大。虽然19%的无牙老人一年中住院30天或更多，但在国民健康保险下，20颗或更多牙齿的人中不到G %。7%的无牙老年人年住院时间在3个月以上，而20颗牙以上的无牙老年人年住院时间均在3个月以上，20颗牙以上的无牙老年人年医疗费用和平均住院日均为无牙老年人的近20%。未进行过专业机械洁牙（PMTC）的个体化口腔保健者，40-49岁平均每年失牙0.4颗，50-59岁平均每年失牙0.73颗。40-49岁人群每年平均掉牙0.21颗，50-59岁人群每年平均掉牙0.33颗。

The study aimed to clarify the role of oral health and 80/20 movement on general health and healty aging.Among the whole elderly population in N town in Hyogo, 1068 peoples, 14% retained 20 or more teeth, 40% lost all the teeth. Sixty four percent of them were under medical care, and 2% were house-bound. Limitation in feeding and daily living was less in those retained 20or more teeth than edentulous people. Self assessed quality of life and social activity was larger in those retained 20 or more teeth than edentulous people, as well.While 19% of the edentulousness elderly spend 30 days or more as in-patient in the year, less than G% of those with 20 or more teeth were same status, under National Health Insurance. Seven persent of the edentulousness elderly spend 3 months or more as in-patient in the year, but none of those with 20 or more teeth were same status.Annual medical expenditure and average in-patient days for those with 20 or more teeth were nearly 20% of the edentulousness.Among users of annual regular orel health check ups which started from 1983 in N town, of those who had not a individual oral health care associated with professionl mechanical tooth cleaning (PMTC), average tooth loss in a year was 0.4 teeth for 40-49 years old, and 0.73 teeth for 50-59 years. Whereas, the number for those who had individual oral health, care and PMTC at lease 3 times after the check ups, average tooth loss in a year was 0.21 teeth for 40-49 years old, and 0.33 teeth for 50-59 years.