Georgiev, Zlatko and Kovacevska, Ivona and Zabokova-Bilbilova, Efka and Petrusevska, Gorgana and Sotirovska-Ivkovska, Ana (2012) Nerve fibers in human deciduous dental pulp. Acta Morphologica Publication of Macedonian assotiation of anatomists and morphologist, 9 (1). pp. 50-52. ISSN 1409 - 9837
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Abstract
Deciduous teeth contrary to permanent ones have relatively short lifetime and functional duration; they are
formed in a much shorter period of time, and are subordinated to an early physiological resorption of the roots, in order
to make free space for lining of the permanent teeth. Dental pulp is a unique tissue, which is responsible for maintaining
of the tooth vitality. In order to examine the reparatory pulp ability of deciduous teeth we investigated histological
changes of the nerve fibers in the pulp. Histological findings were performed on a light microscope and on a Transmission
Electron Microscope. Nerve fibers in deciduous dental pulp showed some disturbances when physiological resorption
had been started.
Under light microscopy, nerve fibers showed unclear pathological changes – they begain to loose the myelin
coat because of increased edema. Using TEM, non-myelin nerve fibers showed disorder in the homogeneousness of
the axoplasmal structure, less density of mucopolysaccharide matrix in some places, which suggested edematous
vacuolar changes and probably under its pressure an atrophy of the axons occurred gradually. The myelin nerve fibers
showed deformations and division of the myelin coat; type lamellar osmiophillic bodies in shape of sphinx’s myelin
figures, with irregular thickness, developed from formation of vacuoles, filled with shapeless and low granulated
material. The Schwann´s cells were degenerated, with relatively preserved nucleus, contrary to the cytoplasm where
collagen fibers are inserted directly and the increased collagenisation became apparent endoneurally. The myelin
nerve fibers are plased longitudinally, their diameters is enlarged; they has interlamellar fissures, and they atrophy with resorption progress.
Key words: deciduous teeth, dental pulp, root resorption, ultrastructure.
| Item Type: | Article |
|---|---|
| Subjects: | Medical and Health Sciences > Basic medicine Medical and Health Sciences > Clinical medicine Medical and Health Sciences > Other medical sciences |
| Divisions: | Faculty of Medical Science |
| Depositing User: | Ivona Kovacevska |
| Date Deposited: | 29 Nov 2012 08:21 |
| Last Modified: | 07 Oct 2013 13:10 |
| URI: | https://eprints.ugd.edu.mk/id/eprint/2276 |
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