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J Dent Res 38(6): 1133-1141, 1959
© 1959 International and American Associations for Dental Research
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ELECTRON MICROSCOPIC STUDIES ON NERVES OF HUMAN TOOTH PULP

KOJI UCHIZONO 1 and KUNINORI HOMMA 1

1 Department of Physiology, Niigata University School of Medicine, Niigata, Japan

Electron microscopic studies on the nerve fibers in the tooth pulps of human front teeth were carried out. It was observed that a great number of the nerve fibers of tooth pulp were medullated, the diameters of which (including the myelin sheath) ranged from 1 to 6 µ, the greatest portion being 2 to 3 µ. All transverse sections of fibers showed several mitochondria. The thickness of the myelin sheath was 0.5 to 1.0 µ, independent of the fiber diameters. The width of the lamella was about 100 Å.

Most nonmedullated fibers had a diameter of 1 to 2 µ and were mostly found near or attached to the blood vessels, suggesting their relationship to the autonomic functions.

Submitted on March 30, 1959
Revised on June 10, 1959






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