Light and electron microscopic analysis of the somata and parent axons innervating the rat upper molar and lower incisor pulp

Abstract The morphology of intradental nerve fibers of permanent teeth and of continuously growing rodent incisors has been studied in detail but little information is available on the parent axons that give rise to these fibers. Here we examined the axons and somata of trigeminal neurons that inner...

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Bibliographic Details
Published in:Neuroscience 2009-09, Vol.162 (4), p.1279-1286
Main Authors: Paik, S.K, Park, K.P, Lee, S.K, Ma, S.K, Cho, Y.S, Kim, Y.K, Rhyu, I.J, Ahn, D.K, Yoshida, A, Bae, Y.C
Format: Article
Language:English
Subjects:
Animals
Axons - ultrastructure
Biological and medical sciences
dental primary sensory neuron
dental pulp
Dental Pulp - innervation
Fundamental and applied biological sciences. Psychology
Horseradish Peroxidase
Incisor - innervation
Male
Mandible
Maxilla
Microscopy, Electron
Molar - innervation
Neurology
parent axon
Rats
Rats, Sprague-Dawley
Trigeminal Nerve - ultrastructure
ultrastructure
Vertebrates: nervous system and sense organs
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Summary:Abstract The morphology of intradental nerve fibers of permanent teeth and of continuously growing rodent incisors has been studied in detail but little information is available on the parent axons that give rise to these fibers. Here we examined the axons and somata of trigeminal neurons that innervate the rat upper molar and lower incisor pulp using tracing with horseradish peroxidase and light and electron microscopic analysis. The majority (∼80%) of the parent axons in the proximal root of the trigeminal ganglion that innervated either molar or incisor pulp were small myelinated fibers (600 μm2 ) constituted 34% and 20% of the trigeminal neurons innervating molar and incisor pulp, respectively, while small somata (
ISSN:0306-4522
1873-7544
DOI:10.1016/j.neuroscience.2009.05.046