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![]() Title:Evaluation of uranium levels in dental amalgam fillings using neutron activation analysis technology Conference:Tmrees25 Tags:amalgam, detector, etching, neutron activation and uranium concentration Abstract: In this pilot study, we calculated uranium concentrations, equivalent and absorbed doses, and radiological hazard coefficients for ten samples of metal amalgam fillings, which consisted of mercury at a ratio ranging from 50 to 60%, and the rest were zinc, tin, silver, and copper, with ratios varying from one manufacturer to another. These samples were collected from different locations in Iraq, from government hospitals, or purchased from authorized dealers, specifically from Baghdad, using neutron activation technology and a CR-39 solid-state path detector. The samples were ground, pressed into 1.5 cm diameter disc-shaped molds, placed over the detector pieces and secured with adhesive tape. They were then exposed to a neutron flux inside an Americium beryllium accelerator for seven days at a neutron flux rate of 105 n.cm-2.sec-1 and a neutron flux of 6.048×1010 n.cm-2 After that, the chemical scraping stage was carried out, and the effects were calculated manually using an optical microscope and also using computer images. The results showed uranium concentrations ranging between (3.0817 and 5.441 parts per million) for the fifth and seventh samples, respectively, and a risk factor ranging between (0.205724 and 0.363222) for the same samples. In other words, the uranium concentration and the risk factor were at their lowest levels for sample number five, and at their highest levels for sample number seven, as shown in the research input table. Our findings demonstrate that uranium is still used today, albeit in very small quantities, in the composition of these fillings, despite being banned in the 1980s. However, its radiation doses remain within the limits permitted by the International Atomic Energy Agency and the World Health Organization Evaluation of uranium levels in dental amalgam fillings using neutron activation analysis technology ![]() Evaluation of uranium levels in dental amalgam fillings using neutron activation analysis technology | ||||
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