The hydrodynamics of the dentine; its possible relationship to dentinal pain
Brännström, M.; Aström, A.
International Dental Journal 22(2): 219-227
1972
ISSN/ISBN: 0020-6539 PMID: 4505631 Document Number: 5875
Experiments carried out in vivo and in vitro on human teeth have yielded further support for the hypothesis that a hydrodynamic factor is responsible for the transmission of pain stimuli from the dentine surface to the nerve endings in the pulpo-dentinal area and/or the pulp. It is concluded that an outward movement of the tubule contents in the pulpal end of the tubule is more liable to produce pain than is a displacement in the opposite direction. In order to elicit pain the movement of the tubule contents must be a rapid one. The differences in hydrodynamic response to cold, air blast etc. and heat appear to correspond to clinically observed differences in the quality of the pain, from which it is concluded that there are two types of pain in the tooth, possibly mediated by two types of nerves.
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