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Journal of Dental Research, Vol 58, 584-587, Copyright © 1979 by International & American Associations for Dental Research Online Journals

ARTICLES

Thermal expansion of composite resins and sealants

J. M. Powers, R. W. Hostetler and J. B. Dennison

Linear thermal coefficients of expansion (alpha) of seven commercial composite resins and four pit and fissure sealants were determined between 0 and 60 degrees 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) degrees C for the composite and from 70.9 to 93.7 x 10(-6)/degrees C for the sealants.




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