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Temperature-dependence of Compressive Properties of Human Dentin

University Dental Hospital of Manchester, Higher Cambridge Street, Manchester, England M15 6FH

O.M. El Mowafy

University Dental Hospital of Manchester, Higher Cambridge Street, Manchester, England M15 6FH

A.A. Grant

University Dental Hospital of Manchester, Higher Cambridge Street, Manchester, England M15 6FH

The effect of temperature on compressive stress/strain behavior of human dentin obtained from recently extracted permanent lower molar teeth has been determined over the range 0-80°C. Dentin specimens were loaded uni-axially in a direction perpendicular to the tubule orientation. A statistically significant, linear regression relationship was found between modulus (E) and temperature (T): The observed temperature coefficient of the modulus is in close agreement with that observed for cortical bone. Proportional limit, compressive strength, and resilience were also found to undergo a linear decrease with increasing temperature. Mechanical failure of specimens generally occurred along lines determined by maximum shear stresses, approximately 45° to the axial load direction.

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Journal of Dental Research, Vol. 66, No. 1, 29-32 (1987)
DOI: 10.1177/00220345870660010601


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