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1 School of Dentistry, The University of Michigan, Ann Arbor, Michigan, and Veterans Administration Hospital, Ann Arbor, Michigan
Mitotic activity within the enamel organs of developing teeth in a fetus and a baby rhesus monkey was studied by tritiated thymidine radioautography.
No labeling or mitotic figures were found in the stellate reticulum or in the functioning ameloblasts. Labeled cells were observed in all the other layers of the enamel organ during and following amelogenesis. It appears, therefore, that the reduced-enamel epithelium is not made up of degenerated cells as proposed by some investigators, since a potential for proliferation was demonstrated in these cells.
Submitted on July 9, 1964
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