Determination of natural radionuclides and some metal concentrations in human tooth samples in the Rize province, Turkey

The main purpose of this study was to identify the concentrations of naturally occurring radionuclides (²²⁶Ra, ²³²Th and ⁴⁰K) and some metals (Fe, Ni, Cu, Zn, Pb and Cd) in tooth samples collected from humans living in the Rize province of Turkey. It was found that the activity concentrations ranged from 8.1 to 114.51 Bq kg⁻¹ for ²²⁶Ra, from 10.44 to 97.3 Bq kg⁻¹ for ²³²Th and from 14.53 to 489.27 Bq kg⁻¹ for ⁴⁰K. The mean activity concentration values of ²²⁶Ra and ²³²Th in tooth samples were higher than the average world values for bones. Furthermore, when the metal concentrations were examined, there was no regular increase or decrease according to age or sex. The results of the metal analysis on the tooth samples were compared with the results of similar studies and were generally found to be consistent.