Nerve fibers in human deciduous dental pulp

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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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

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