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Morphologic Change of Parvalbumin-positive Myelinated Axons in the Human Dental Pulp.

Abstract：

INTRODUCTION:Information on the nerve fibers innervating the dental pulp is crucial for understanding dental pain and hypersensitivity. This study investigated the morphologic differences of parvalbumin (PV)-positive (+) myelinated fibers in 3 different regions of the human dental pulp. METHODS:Light and electron microscopic immunohistochemistry for parvalbumin, a marker for myelinated fibers, and quantitative analysis were performed in the apical root, core of coronal pulp, and peripheral pulp of human premolar teeth. RESULTS:About 40% of the myelinated fibers in the apical root pulp became unmyelinated in the core of the coronal pulp, and virtually all the remaining fibers became unmyelinated at the peripheral pulp. The size of myelinated axons decreased from root to peripheral pulp. PV+ axons showed extensive axonal varicosities in the peripheral pulp. CONCLUSIONS:These findings suggest that the myelinated fibers innervating the human dental pulp undergo extensive morphologic change in the extrapulpal region and in the coronal and peripheral pulp, and that PV-mediated regulation of calcium concentration and its downstream events may occur primarily in axonal varicosities in the peripheral pulp.

journal_name

J Endod

journal_title

Journal of endodontics

authors

Kim TH,Park SK,Choi SY,Lee JS,Bae YC

doi

10.1016/j.joen.2017.01.010

subject

Has Abstract

pub_date

2017-06-01 00:00:00

pages

977-981

issue

6

eissn

0099-2399

issn

1878-3554

pii

S0099-2399(17)30015-8

journal_volume

43

pub_type

杂志文章

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