Evaluation of dental X-ray apparatus in terms of patient exposure to ionizing radiation

摘要

Background: The use of X-ray in dental procedures causes exposure of the patient to ionizing radiation. This exposure dependsprimarily on the parameters used in tooth examination. The aim of the study was to determine the patients exposure and to assessthe technical condition of X-ray tubes. Material and Methods: Seventeen hundred dental offices were covered by the questionnairesurvey and 740 questionnaires were sent back. Direct measurements were performed in 100 units by using the thermoluminescentdetectors and X-ray films. Results: The results showed that the most commonly used exposure time is 0.22±0.16 s. Theaverage entrance dose for the parameters used most commonly by dentists is 1.7±1.4 mGy. The average efficiency of X-ray tubeestimated on the basis of exposures is 46.5±23.7 μGy/mAs. Conclusions: The study results indicate that the vast majority of X-raytubes meet the requirements specified in the binding regulations. Med Pr 2017;67(4):491–496