乳歯齲蝕の頻度に関する研究

概要

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As yet few observations had been reported concerning the prevalance of carious lesions in preschool children in Japan, authors examined the dental caries incidence of 2, 123 children in City of Kawasaki under the purpose to obtain the more conclusive data. The results are as follows: 1. In the deciduous dentition, caries started prior to the first birthday, and the percentage of dental caries contraction was 85% at 3 years and 98.5% at 6 years of age. 2. The number of carious teeth per person were 6.25 teeth at 3 years and 10.25 teeth at 6 years of age. 3. In the upper jaw, the susceptibility to carious lesions were central incisor, second- and first-molars, lateral incisor and canine in descending order. In the lower, both molars had equivalent high susceptibility, but all frontal teeth had extremely resistance to carious lesions. 4. The rate of caries contraction on each surface of teeth in transition of age were studied. In addition, 1, 884 extracted deciduous teeth were also examined, and proximal surface has more susceptibility to carious lesion than the result attained by clinical examination.
有限責任中間法人日本口腔衛生学会の論文