著者

飯塚 康之

出版者

岩手医科大学歯学会

雑誌

岩手医科大学歯学雑誌 (ISSN:03851311)

巻号頁・発行日

vol.22, no.3, pp.256-263, 1997-12-30 (Released:2017-06-05)

参考文献数

33

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This study was done to examine the effects of protein and fat contents in the diet of mice on the resistance to demineralization of a tooth and the distribution of calcium and phosphorus in the enamel and dentine. Since the maternal generation, the mice were bred and given a diet of different contents;group H (high-protein: high-fat diet), group L (low-protein: low-fat diet) and group C (normal content diet). Electron probe X-ray microanalysis (EPMA) was used to determine the amount of calcium and phosphorus in the tooth.The results were as follows: 1) The resistance to demineralization of the tooth was lower in a low-protein and low-fat diet, and increased with the additional content of protein and fat in the diet.Reach and over some amount, the tooth size had a tendency to increase becauSe of the diet, but the increase of resistivity was not remarkable. 2) Among the three groups, no particular difference of the concentrations in weight percent of both calcium and phosphorus was confirmed. 3) In all groups, both of the elements increased in the concentration in weight percent, from the surface to the inner limit of one third of the outer enamel layer. In the area of two thirds of the inner enamel layer decreased slightly toward the dentinoenamel junction. In the dentine layer, these two elements gradually increased in the concentration toward the depth of the tooth. 4) The resistance to demineralization of tooth group L was significantly lower than group H or group C. It is suggested that the intake of protein and fat in the formative period of a tooth may influence the resistance to demineralization.