幼児の歯数値に関する研究
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概要
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For the education and management of dental health, it is important to take proper measures by understanding the number of teeth and decayed teeth of each individual as well as by grasping the points of dental problems.<BR>For the above purpose, the author devised the value of deciduous teeth regarding decayed teeth and filled teeth as well as the existence teeth on the infants.<BR>As the materials of the present study, a total number of 9, 296 infants were employed, their age ranged from 12 months to 5 years and 11 months, living in Tokyo.<BR>They were divided sexually, and then, 1 year old infants were classified into four groups, that is, every 3 months old group; 2, 3 and 4 years old infants were classified into 3 groups, that is, every 4 months old group; and 5 years old infants were classified into 2 groups, that is, every 6 months old group. On each group, arithmetic mean and standard deviation were calculated on the value of existence teeth. And the width of the upper and lower ±1/2σ of the mean value was set as average, the width of upper a was set as numerous, and the width of the lower a was set as scanty.<BR>Moreover, more than numerous was set as far numerous, and lower than scanty was set as far scanty.<BR>As for def, decayed teeth, the value of deciduous teeth of the filled teeth, cumulative frequency distribution (%) was prepared, the snallest to 6.7% was set as far scanty, 6.8-30.9% was set scanty, 31.0-69.1 % was set as average, 69.2-93.3 % was set as numerous, and more than 93.4% was set as far numerous.<BR>1. The value of existence teeth was clsssified into 5 divisions namely, far numerous, far scanty, average, numerous, and scanty. In view of sexual difference on the above divisions, each“division evaluating value”was more numerous in males up to 18 months old, while it was more numerous in females from 24 months old to 36 months old.<BR>2. The value of decayed teeth and def were classified into 3 divisions, namely, far numerous, numerous and average.<BR>Surface caries and deep seated root stump caries were classified into 2 divisions, namely, far numerous and numerous.<BR>Also, the value of filled teeth was classified into 1 division of far numerous each.<BR>When each was compared on sexual difference, the difference of value was very minor.
- 有限責任中間法人 日本口腔衛生学会の論文