Ten Cate's Oral Histology - E-Book: Development, Structure, and Function by Antonio Nanci

Author:Antonio Nanci
Language: eng
Format: mobi
ISBN: 9780323485180
Publisher: Elsevier Health Sciences
Published: 2017-08-14T16:00:00+00:00

FIGURE 8-39 A, Low-power photomicrograph of the dentin-pulp complex. B, At higher power, the cell-free zone (of Weil) beneath the odontoblast layer is clearly visible, as is the cell-rich zone.

FIGURE 8-40 Schematic representation of the cells bordering the pulp. rER, Rough endoplasmic reticulum.

Odontoblasts

The most distinctive cells of the dental pulp, and therefore the most easily recognized, are the odontoblasts. Odontoblasts form a layer lining the periphery of the pulp and have a process extending into the dentin (Figure 8-41, A). In the crown of the mature tooth, odontoblasts often appear to be arranged in a palisade pattern three to five cells deep. This appearance is an artifact caused by crowding of the odontoblasts as they migrate centripetally and also by a tangential plane of section. The number of odontoblasts corresponds to the number of dentinal tubules and, as mentioned previously, varies with tooth type and location within the pulp space. The odontoblasts in the crown are larger than odontoblasts in the root. In the crown of the fully developed tooth, the cell bodies of odontoblasts are columnar and measure approximately 50 µm in height, whereas in the midportion of the pulp, they are more cuboid and in the apical part more flattened.

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