KINETICS OF THE INNER ENAMEL EPITHELIUM IN THE ADULT RAT INCISOR DURING ACCELERATED ERUPTION

Gershom Zajicek*, Yael Michaeli, Max M. Weinreb

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Inner enamel epithelial (IEE) cell production was compared in accelerated and normal eruption (control). Each group consisting of thirty rats received 1 μCi/g tritiated thymidine. The animals were sacrificed at short time intervals up to 14 hr after injection. The excised incisors were cut mid‐sagittally and processed autoradiographically. The fast growing incisor produces twice as many cells as the control. Increased cell production is achieved in two ways: proliferative pool expansion (by 25.5%) and generation time (tc) shortening to 16 hr (tc= 23 hr in the control). Generation time shortening resulted mainly from a diminution in tg1= 8.6 hr (tg1= 14.1 hr in the control) and ts which equaled 5.5 hr (ts= 7 hr in control). Mitotic times which equaled 0.4 hr and tg2, 1.5 hr were identical in both groups. The eruption/IEE cell production ratio equals 1.1 in both groups.

Original languageEnglish
Pages (from-to)35-39
Number of pages5
JournalCell Proliferation
Volume5
Issue number1
DOIs
StatePublished - Jan 1972
Externally publishedYes

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