Biomonitoring of trace elements in human teeth has become an important tool to evaluate an individual’s nutritional and environmental status.1–5 Primary teeth are easily obtained because they naturally exfoliate as the permanent teeth erupt. Variations in the content of trace elements in the teeth have been previously demonstrated.1 Trace elements can be ingested by humans via different routes, including ingestion in the food and water or by deliberate consumption of soil and by dermal absorption. The presence and/or absence of trace elements in the environment influences their availability to humans.1 For example, in the rural areas of Finland, the concentrations of Zn and Mg found in human dentine correlate with their concentrations in the soil,6 and dental fluorosis has been linked to the concentrations of fluoride (F–) and Pb present in the drinking water.1,...