Niveles de cadmio y plomo en dientes deciduos de niños residentes en la Ciudad de México

Resumen

Cadmium and lead levels in 79 deciduous teeth from children between 5 and 13 years old living in the México City Metropolitan Zone were determined by graphite furnace atomic absorption spectrometry. Lead and cadmium concentrations showed a positively skewed distribution and results were transformed into logarithms. The geometric mean concentrations (GM) in all teeth were 0.22 ± 3.4 and 10.2 ± 2.2 μg g^-1 for cadmium and lead, respectively. No statistical differences were observed for cadmium and lead concentrations among tooth type, tooth position, gender, socioeconomic level, and use or no use of color crayons. Cadmium values decreased with children’s age and lead levels did not show a clear tendency. Statistical differences were only observed for cadmium according to age.