An electron microscopic study of odontoblasts in the apical third of permanent human teeth
Date
1986
DOI
Authors
Pretorius, Abraham Marthinus
Version
OA Version
Citation
Abstract
Ten mature human teeth of different ages were demineralized and odontoblasts were studied with a transmission electron microscope. Sections were made from the apical 3mm and the cemento enamel junction as a control. Apart from the different shape of odontoblasts from the two areas, the cytoplasmic organelles were found to differ considerably. Nuclei differed mainly in the ratio of euchromatin to heterochromatin. Odontoblasts from the apical area had a noticable increase in heterochromatin which indicates a low degree of cellular activity. Rough endoplasmic reticulum and Golgi complex were either absent or in a rudimentary form in odontoblasts from the apical part of the radicular pulp. When present, the polarity of the cell changed relative to the odontoblastic process. The nucleus moved from a position proximal in the cell body to a central position, while the rough endoplasmic reticulum moved from a supra nuclear position to an infra nuclear position. Generally, the odontoblasts from the apical part of the radicular pulp were in a state of low activity or no activity compared with the odontoblasts from the cemento enamel junction.
Description
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Thesis (M.Sc.D.)--Boston University, School of Graduate Dentistry. Dept. of Endodontics, 1986.
Includes bibliographic references: leaves 84-90.
Thesis (M.Sc.D.)--Boston University, School of Graduate Dentistry. Dept. of Endodontics, 1986.
Includes bibliographic references: leaves 84-90.
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This work is protected by copyright. Downloading is restricted to the BU community. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.