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1 Department of Physiology and Biophysics, Georgetown University School of Dentistry, Washington, D.C.
The distribution of Ca45 and P32 was studied in developing teeth. One of the two tracers was injected into the dental circulation of young rats. Mandibular tissues were obtained for histologic study, from 5 seconds to 3 minutes after injection, and autoradiographs of sections made immediately. These same sections were then stained, using conventional methods, and the two representatives of the same section were then compared. These sections showed an extremely rapid and effective exchange of Ca45 and P32 between the systemic circulation and water of hard dental tissues.
Submitted on January 22, 1963
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