Document Detail

Dentine hypersensitivity: the measurement in vitro of streaming potentials with fluid flow across dentine and hydroxyapatite.
MedLine Citation:
PMID:  8381178     Owner:  NLM     Status:  MEDLINE    
Stimulus transmission across dentine, in conditions such as dentine hypersensitivity, is considered to occur via a hydrodynamic mechanism. This fluid flow in dentine may then induce a mechanoreceptor response in pulpal nerves. However, when fluid flows through a porous structure electrical potentials are also generated. The aim of this study was to develop a reproducible model system to measure streaming potential across dentine and hydroxyapatite and determine the influence of pressure. Using an acrylic cell, with silver electrodes, streaming potentials were recorded across dimensionally standardized dentine and hydroxyapatite specimens, over a pressure range of 1-6 atmospheres. Streaming potentials were found to be directly proportional to pressure and dependent on the electrical conductivity of the saline used in the cell. The results confirm the limited existing data on streaming potentials across dentine and indicate that at these low pressures excitation of pulpal nerves would not occur. However, if, as may be the case, stimuli applied to dentine create very high pressures, the resultant potentials generated could indeed evoke a neural response. The model system is worthy of further use to study this phenomenon and the factors which may influence it.
H Griffiths; G Morgan; K Williams; M Addy
Related Documents :
8241718 - Body fluid distribution in man in space and effect of lower body negative pressure trea...
3264728 - Filament lattice of frog striated muscle. radial forces, lattice stability, and filamen...
14649498 - Simultaneous measurement of interstitial fluid pressure and load in rat skin after stra...
7327968 - Influence of alterations in starling forces on visceral pleural fluid movement.
2251618 - The effect of magnesium sulphate infusion on circulating catecholamine levels in severe...
6847018 - Calcium and magnesium nutrition in human hypertension.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of periodontal research     Volume:  28     ISSN:  0022-3484     ISO Abbreviation:  J. Periodont. Res.     Publication Date:  1993 Jan 
Date Detail:
Created Date:  1993-03-03     Completed Date:  1993-03-03     Revised Date:  2000-12-18    
Medline Journal Info:
Nlm Unique ID:  0055107     Medline TA:  J Periodontal Res     Country:  DENMARK    
Other Details:
Languages:  eng     Pagination:  60-4     Citation Subset:  D; IM    
Department of Medical Physics, University of Wales College of Medicine, Cardiff, United Kingdom.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Dentin / physiology*
Dentin Sensitivity / physiopathology*
Electric Conductivity
Membrane Potentials
Models, Biological
Models, Structural
Osmolar Concentration
Osmotic Pressure
Reg. No./Substance:
0/Hydroxyapatites; 1306-06-5/Durapatite

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Inhibition of the formation of oral calcium phosphate precipitates: beneficial effects of Chinese tr...
Next Document:  Microbiological and clinical monitoring of non-localized juvenile periodontitis in young adults: a r...