Abstract
Human teeth are a readily accessible biological tissue for which the analysis of lead has been used for the classification of people in terms of their lead exposure and absorption. However, there are three significant problem areas in the interpretation of the analytical results for lead in teeth. First, the lead is not homogeneously distributed throughout the tooth; secondly, the lead levels vary with tooth type, which relates to the age of a tooth. Lastly, there are significant variations in results from different laboratories, which, in part, reflect problems with contamination, pretreatment and analytical methods. Since teeth provide an integrated historical record of a person's lead exposure they have some attractive features as biological indicators, compared with materials such as blood. But considerable care and attention to detail is necessary to obtain reliable data.
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