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Journal of Dental Research
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Thermal Expansion of Composite Resins and Sealants

J.M. Powers

School of Dentistry, University of Michigan, Ann Arbor, Michigan 48109

R.W. Hostetler

School of Dentistry, University of Michigan, Ann Arbor, Michigan 48109

J.B. Dennison

School of Dentistry, University of Michigan, Ann Arbor, Michigan 48109

Linear thermal coefficients of expansion ({alpha}) of seven commercial composite resins and four pit and fissure sealants were determined between 0 and 60°C on a thermomechanical analyzer. The thermal expansion curves obtained were nonlinear. Values of {alpha} ranged from 26.5 to 39.6 x 10-6 °/C for the composite and from 70.9 to 93.7 x 10-6/°C for the sealants.

Journal of Dental Research, Vol. 58, No. 2, 584-587 (1979)
DOI: 10.1177/00220345790580020701
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D.C. Watts, R. McAndrew, and C.H. Lloyd
Thermal Diffusivity of Composite Restorative Materials
Journal of Dental Research, October 1, 1987; 66(10): 1576 - 1578.
[Abstract] [PDF]