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Journal of Dental Research
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The Effect of Environmental Aging on the Fracture Toughness of Dental Composites

R.M. Pilliar

Faculty of Dentistry, University of Toronto, 124 Edward Street, Toronto, Ontario, Canada M5G 1G6

R. Vowles

Institute of Medical and Dental Bioengineering, University of Liverpool, Liverpool, United Kingdom

D.F. Williams

Institute of Medical and Dental Bioengineering, University of Liverpool, Liverpool, United Kingdom

The effect of aging four commercially-available dental composites in water or ethanol at 37°C for periods of up to 28 days was assessed by measuring changes in the materials' plane-strain fracture toughness (KIC). The results, obtained by means of a mini Short Rod Fracture Toughness Test specimen design, suggest that while water aging does not produce significant changes in KIC, aging in ethanol does cause significant increases in fracture toughness for three of the four dental composites studied. In view of previously-reported loss of wear resistance for dental composites aged in ethanol solutions, the present study emphasizes the difficulties in using fracture toughness to predict wear properties.

Journal of Dental Research, Vol. 66, No. 3, 722-726 (1987)
DOI: 10.1177/00220345870660030301
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This article has been cited by other articles:


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 JDRHome page
J.L. Ferracane and H.X. Berge
Fracture Toughness of Experimental Dental Composites Aged in Ethanol
Journal of Dental Research, July 1, 1995; 74(7): 1418 - 1423.
[Abstract] [PDF]

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 JDRHome page
L.E. Tam and R.M. Pilliar
Fracture Toughness of Dentin/Resin-composite Adhesive Interfaces
Journal of Dental Research, May 1, 1993; 72(5): 953 - 959.
[Abstract] [PDF]

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J.L. Ferracane and V.A. Marker
Solvent Degradation and Reduced Fracture Toughness in Aged Composites
Journal of Dental Research, January 1, 1992; 71(1): 13 - 19.
[Abstract] [PDF]