A previous study of the distribution of 241Am in adult mice indicated that the dental pulp accumulated considerable amounts of this radionuclide ( HAMMAR-STROM & NILSSON 1970).Investigation on the distribution in the teeth of other actinide radioelements such as 239Pu and 22XTh (JEE & ARNOLD 1960, ULL-BERG et coll.1962) have revealed that these elements are deposited in the newly formed dentinal surface of the pulp chambers although no uptake in the soft tissues of the dental pulp has been reported.It was therefore considered of value to study more in detail the uptake of '"Am in the teeth.The distribution of 241Am in the developing enamel was also investigated.So far there seems to be no detailed report on the distribution of any actinide element in the developing enamel. Material and MethodsFour 10-day-old rats of the Sprague-Dawley strain were injected intraperitoneally with 0.26 ml of "'Am citrate solution to give an individual dose of
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Lars Hammarström (1970) studied this question.
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