Effects of changes in surface area, thickness, temperature and post-extraction time on human dentine permeability

W. C. Outhwaite, M. J. Livingston, David Henry Pashley

Research output: Contribution to journalArticle

91 Citations (Scopus)

Abstract

Discs of dentine, from freshly extracted human third molars, prepared free of enamel and pulp horns, were placed in a double-chamber device. Radioactive iodide was placed on one side of the disc and iodide that permeated to the other side of the disc was continually rinsed into a fraction collector. Steady-state permeability values were calculated using the Fick equation. Doubling the surface area doubled the amount of iodide permeating dentine per unit time. The slope of the line relating these two variables depended upon how near the pulp chamber the disc was prepared. Reduction in dentine thickness from the enamel side of discs resulted in a larger increase in permeability than reductions from the pulp side. Increasing dentine temperature 10 °C almost doubled permeability to 125I. Post-extraction time had little effect on dentine permeability measured in vitro.

Original languageEnglish (US)
Pages (from-to)599-603
Number of pages5
JournalArchives of Oral Biology
Volume21
Issue number10
DOIs
StatePublished - Jan 1 1976

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Dentin Permeability
Dentin
Iodides
Permeability
Temperature
Dental Enamel
Third Molar
Dental Pulp Cavity
Horns
Equipment and Supplies

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Dentistry(all)
  • Cell Biology

Cite this

Effects of changes in surface area, thickness, temperature and post-extraction time on human dentine permeability. / Outhwaite, W. C.; Livingston, M. J.; Pashley, David Henry.

In: Archives of Oral Biology, Vol. 21, No. 10, 01.01.1976, p. 599-603.

Research output: Contribution to journalArticle

Outhwaite, W. C. ; Livingston, M. J. ; Pashley, David Henry. / Effects of changes in surface area, thickness, temperature and post-extraction time on human dentine permeability. In: Archives of Oral Biology. 1976 ; Vol. 21, No. 10. pp. 599-603.
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