Risk Assessment of the Exposure to X-rays in Odontology Students

Abstract

ISEE-409 Objective: Assess the risk of exposure to X-rays in odontology students. Introduction: X-rays, with their high penetration ability and possible high-risk dose accumulation, are used in dentistry and handled with little precaution in developing countries. This exposure has not been assessed or regulated among students and it starts during training, possibly extending forever. This project assesses the exposure risk in dentistry students. Material and Methods: Following EPA's risk assessment methodology, the average exposure of dentistry students was estimated. Risk characterization included estimating the effective equivalent (E) dose in mSv and comparing it to international standards. The measurements were made using termoluminiscent dosimeters (TLD). Different scenarios were analyzed. Results: The estimated E for shots of 1.25 seconds was 53.81 mSv/4-months period. Attenuation by using of apron and Thyroid collar with lead diminishes the risk to 68% (36.4 mSv); decreasing exposure time to 0.6 seconds diminishes the risk to 55% (29.73 mSv/4-months period). Both reductions adopted together diminish the risk to 49% (26.28 mSv/4-months period). Conclusions: Results show that students are exposed to dose above the norm. Several scenarios are estimated and prevention suggestions are given.