台湾高山族児童の乳歯齲蝕および歯肉疾患に関する疫学的研究

Abstract

The extent of incidence of dental diseases in the Taiwan aboriginal children have been a subject of interest. Little, however, has been reported because of the geographical peculiarity. A study on the Taiwan aboriginal children (Ami, Bunun, Paiwan and Rukai tribes) was therefore made in July and December 1979. A total of 530 subjects, 276 males and 254 females, from 3 to 14 in age were studied on their dental diseases and the oral environment. The results were as follows : 1. The mean number of deciduous teeth was a maximum of 19.83±0.14 in the males and a maximum of 19.74±0.21 in the females at the ages from 3 to 5, and showed a decreasing tendency with an increase in age in both males and females. 2. The percentage of prevalence of dental caries in deciduous teeth showed a particular high values of 88% or more at the ages from 3 to 10 in the males and the ages from 3 to 9 in the females. The males showed a significantly higher value (p<0.05) than the females at 13 years. 3. The df tooth rate was 42-64% at the ages from 3 to 11 in both males and females. The rate was significantly higher (p<0.05) in the males than in the females for the ages from 3 to 5, and in the females than in the males for 9 years. 4. The mean number of df teeth showed 9.78±0.93 in the males and 8.37±1.03 in the females at the ages from 3 to 5 and a maximum of 10.69±0.95 in the males and 10.87±0.87 in the females at 6 years. After 7 years, a decreasing tendency with an increase in age was observed in both males and females. No significantly difference between males and females was showed for each age. 5. The OHI was a maximum of 4.17±0.17 in the males and a maximum of 4.14±0.21 in the females at 7 years, and fairly constant at 3.2-4.2 at the ages from 3 to 13 in both males and females. The OHI was significantly higher (p<0.05) in the females than in the males for 9 years and in the males than in the females for 14 years. The DI was significantly higher (p<0.05) in aboriginal children than in Japanese children at 7 years in the males and at 9 years in the females. 6. The PMA index was a maximum of 2.15±0.96 in the males and a maximum of 1.54±1.22 in the females, and fairly constant at low level in both males and females for each age. The aboriginal children showed significantly lower values (p<0.05, 0.01) than the Japanese children for each age. On the basis of the foregoings, high incidence of dental caries in deciduous teeth and poor of oral hygiene were observed in the aboriginal children. Therefore, it is seemed to be suggested very important subjects for dental public health in Taiwan.