الملخص

Abstract This paper aims to find the Radon concentration in some materials used in dentistry field such as temporal and germinant composites, impression materials, bridges as well as the crowns. The measurement have been carried out by using the nuclear track detector CR-39. The results have showed that the Radon content in the irradiation chambers were about (5.208-14.260) Bq. m-3, while the Radon contend within the samples themselves were (0.0513-0.174) Bq.kg-1. Morever, the concentration of Uranium and Radium have also been determined and they ranged between (415.5-1409.4) ppb and (1.403 x10-6-4.759 x10-6) ppb subsequently. The emission rate or the mass inhalation of Radon is found to be about (0.061x10-7-1.074x10-7) Bqkg-1.d-1