人歯牙の含有亜鉛・カドミウムおよび砒素量に関する研究

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The zinc, cadmium and arsenic concentrations in normal teeth which were obtained randomly from the Kitakyushu area, Takachiho area and Tsushima area, were quantitatively determined by atomic absorption spectrophotometry on a basis of dry weight. The results of the experiments were as follows : 1) The mean values of trace metal concentrations in 123 teeth from the Kitakyushu area were 171.96 μg/g of zinc, 0.55μg/g of cadmium and 0.26μg/g of arsenic. 2) The mean values of trace metal concentrations in 35 teeth, obtained from the healthy subjects in the Takachiho area, were 194.91μg/g of zinc, 0.76μg/g of cadmium and 0.77μg/g of arsenic. These percentages were significantly higher than those of the Kitakyushu area. 3) The mean values of trace metal concentrations in 12 teeth, obtained from the chronic As-disease in the Takachiho area, were 269.91μg/g of zinc, 1.31μg/g of cadmium and 1.65μg/g of arsenic. These levels were significantly higher than those of the healthy subjects in the Takachiho area. 4) The mean values of trace metal concentrations in 3 teeth from the Tsushima area were 167.55μg/g of zinc, 0.50μg/g of cadmium and 0.52μg/g of arsenic. 5) The mean values of zinc, cadmium and arsenic concentrations taken from various age were observed to be generally higher in the Takachiho area when compared to those of the same age groups in the Kitakyushu area and Tsushima area. 6) The Cd/Zn ratio and As/Zn ratio of teeth, obtained from the chronic As-disease in the Takachiho area, were significantly higher than those of teeth in other groups. In conclusion, the environmental pollution in the Takachiho area has relatively high levels of arsenic concentration. However, this could be considered partial offset by comparatively high levels of cadmium, zinc and another metals concentrations, too.
九州歯科学会の論文
1978-03-31

著者

久保哲郎
九州歯科大学大学院歯学研究科:九州歯科大学外科学教室

人歯牙の含有亜鉛・カドミウムおよび砒素量に関する研究

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