Abstract
Deciduous teeth, when analyzed by tooth type, appeared to be valid indicators of the ingestion of water containing low levels of 226Ra during the time of tooth formation. Pools of deciduous teeth from lifelong residents of thirty-five Illinois and Iowa communities served by public water supplies with 226Ra levels ranging from 0.04 to 20.0 pc/l were analyzed for 226Ra. The correlation between 226Ra levels in water and deciduous teeth was found to be direct, apparently linear and highly significant for both incisors and cuspids-and-molars. 226Ra levels in cuspids-and-molars averaged 80 per cent of the levels in incisors. Some possible limitations in the use of deciduous teeth for estimating 226Ra levels in community water supplies and whole-body burdens of 226Ra in individuals were investigated.
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