Dentin Permeability: Effects of Temperature on Hydraulic Conductance

Abstract

The rates of fluid movement across dentin discs, in vitro, were measured at 10, 20, 30, 40, and 50°C in unetched and acid-etched dentin. Increasing the temperature 40° (i.e., from 10 to 50°C) resulted in a 1.8-fold increase in fluid flow in unetched dentin, which was of a magnitude similar to the decrease in viscosity that occurred over the same temperature range. In acid-etched dentin, the 40°C temperature change produced more than a four-fold increase in fluid conductance, more than double that which could be accounted for by changes in viscosity. Analysis of the data suggests that this additional increment in hydraulic conductance is due to thermal expansion-induced increases in tubular diameter.

Get full access to this article

View all access options for this article.

References

Brannstrom, M; Linden, L.A. ; and Astrom, A. : The Hydrodynamics of the Dental Tubule and of Pulp Fluid. A Discussion of its Significance in Relation to Dentinal Sensitivity, Caries Res 1:310-317, 1967.

Brannstrom, M. ; Linden, L.A. ; and Johnson, G. : Movement of Dentinal and Pulp Fluid Caused by Clinical Procedures, J Dent Res 47:679-682, 1968.

Brannstrom, M. and Astrom, A. : The Hydrodynamics of the Dentin: Its Possible Relationship to Dentinal Pain, Int Dent J 22:219-227, 1972.

Horiuchi, H. and Matthews, B. : In vitro Observations on Fluid Flow through Human Dentine Caused by Pain Producing Stimuli, Arch Oral Biol 18:275-294, 1973.

Haegerstam, G. : The Effect of Veratrine and Aconitine on the Excitability of Sensory Units in the Tooth of the Cat, Acta Physiol Scand 98:1-7, 1976.

Trowbridge, H.O. ; Franks, M. ; Korostoff , E. ; and Emling, R. : Sensory Response to Thermal Stimulation in Human Teeth, J Endo 6:405-412, 1980.

Hensel, V.H. and Mann, G. : Temperatur und Warmleitung im Menschlichen Zahn, Stoma 9:76-85, 1956.

Van Hassel, H.J. and Ervin, M. : Correlation of Sensory Response with Intrapulpal Temperature and Pressure, AADR Progr & Abst 52: No. 342, 1973.

Brannstrom, M. ; Johnson, G. ; and Linden, L.A. : Fluid Flow and Pain Response in the Dentin Produced by Hydrostatic Pressure, Odont Revy 20:1-16, 1969.

10.

Brannstrom, M. and Johnson, G. : Movements of the Dentine and Pulp Liquids on Application of Thermal Stimuli: An in vitro Study, Acta Odontol Scand 28:59-70, 1970.

11.

Matthews, B. : Cold-sensitive and Heat-sensitive Nerves in Teeth, J Dent Res 47:974-975, 1968.

12.

Reeder, O.W. ; Walton, R.E. ; Livingston, M.J. ; and Pashley, D.H. : Dentin Permeability: Determinants of Hydraulic Conductance, J Dent Res 57:187-193, 1978.

13.

Weast, R.C. , Ed.: Handbook of Chemistry and Physics, Cleveland, OH: Chemical Rubber Co., 1970, p. F-36.

14.

Outhwaite, W.C. ; McKenzie, D.M. ; and Pashley, D.H. : A Versatile Split Chamber Device for Studying Dentin Permeability, J Dent Res 53:1503, 1974.

15.

Pashley, D.H. ; Michelich, V. ; and Kehl, T. : Dentin Permeability: Effects of Smear Layer Removal, J Prosthet Dent 46:531-537, 1981.

16.

Skalak, R. and Chein, S. : Capillary Flow: History, Experiments and Theory, Biorheology 18:307-330, 1981.

17.

Michelich, V. ; Pashley, D.H. ; and Whitford , G.M. : Dentin Permeability: Comparison of Functional versus Anatomical Radii, J Dent Res 57:1019-1024, 1978.

18.

Soremark, R. ; Soremark, C. ; Martin-Lof , S. ; and Myrberg, N. : Thermal Expansion of Dental Tissues, Anal NYAcad Sci 204:169-190, 1973.

19.

Pashley, D.H. ; Livingston, M.J. ; and Greenhill , J.D. : Regional Resistance to Fluid Flow in Human Dentin, in vitro, Arch Oral Biol 23:807-810, 1978.

20.

Beveridge, E.E. and Brown, A.C. : The Measurement of Human Dental Intrapulpal Pressure and its Response to Clinical Variables, Oral Surg 19:655-668, 1965.

21.

Van Hassel, H.J. and Brown, A.C. : Effect of Temperature Changes on Intrapulpal Pressure and Hydraulic Permeability in Dogs, Arch Oral Biol 14:301-315, 1969.