Restorative resins: Coefficient of thermal expansion- a factor of clinical significance?

Asmussen, Erik; Jørgensen, Knud Dreyer
September 1978
Quintessence International;Sep1978, Vol. 9 Issue 9, p79
Academic Journal
A research is presented which focuses on dental restorative resins by analyzing, the paper of R. J. Nelsen, R. B. Wolcott and G. C. Paffenbarger, on marginal percolation caused by thermal changes, and comparative studies of the performance of composite and non-composite resins with respect to marginal leakage. From the literary work, as stated, it can be said that the high coefficient of thermal expansion of the unfilled resins makes these materials clinically less suitable. Many experiments, as stated, have shown that a non-composite resin may have a wall-to-wall polymerization contraction that is less than the contraction of a composite resin. The research concludes that, if choice of restorative resin is right than its coefficient of thermal expansion is not clinically significant.


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