A Study on Trace Elements (Mn, As, Cd, Hg) Contained in Dental Calculus

Publisher Website
Google Scholar
Abstract
Dental calculus contains various trace elements, but a standardized method of detection has not yet been established. The author detected traces Mn, As, Cd, and Hg in calculus by means of radioactivition analysis and conducted a quantitative analysis of them. The results of the experiments were as follows: 1) In a preliminary experiment, a standard sample and each test sample were irradiated with neutrons under fixed conditions, and quantitative values were measured for each sample. The γ-ray-spectrum of each test sample showed a similar peak point contrased with that of a standard sample of calculus: 56Mn had 0.874 Mev of γ-ray spectrum, 76As had 0.549 MeV of γ-ray spectum, Cd had 115mIn 0.335 MeV of γ-ray spectrum, and 203Hg had 0.274 MeV of γ-ray spectrum. 2) The four regions of Tokyo, Osaka, Toyama and Niigata were compared as to the detection of Mn, As, Cd, and Hg in calculus. A significant difference was found for Mn and Cd between regions. The most Mn was found in the Toyama region, and the most Cd was in the Tokyo region.

This publication has 0 references indexed in Scilit: