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J Dent Res 32(1): 110-116, 1953
© 1953 International and American Associations for Dental Research
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PHYSIOLOGIC STUDIES ON THE INNERVATION OF TOOTH

ELECTRICAL IMPULSES FROM THE PULP NERVE FIBER

MAMORU YAMADA 1, JURO MARUHASHI 1, KYOZO SUGAYA 1, GAKURO HARA 1, and MINORU MASUDA 1

1 Department of Physiology, Tokyo Dental College

Physiologic investigations were made to explain the etiology of hypersensitive dentin. The results obtained were as follows:

1. Electrical afferent impulses from the mandibular nerve were evident when dentinoenamel junction, predentin, or odontoblasts were stimulated.

2. While rubbing dentin, the impulses could not be found, but, occasionally, spontaneous discharge was elicited.

3. These results suggest that the nerve fibers do not terminate in the dentinal tubules.

4. A hot air jet was more effective than cold water and electrical stimulus in causing the excitation.

Submitted on May 21, 1952






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