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The influence of various cavity bases on the micro‐hardness of composites
Author(s) -
Marshall S. J.,
Marshall G. W.,
Harcourt J. K.
Publication year - 1982
Publication title -
australian dental journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.701
H-Index - 71
eISSN - 1834-7819
pISSN - 0045-0421
DOI - 10.1111/j.1834-7819.1982.tb05249.x
Subject(s) - calcium hydroxide , glass ionomer cement , composite number , hardness , composite material , materials science , indentation hardness , base (topology) , dentistry , chemistry , microstructure , mathematics , medicine , mathematical analysis
A bstract — This study reports the effects of five commonly used bases on the hardness of three newer composite resins. The bases were a calcium hydroxide, a polycarboxylate, a ZOE, an EBA, and a glass ionomer cement. All bases except the calcium hydroxide caused reduction in the hardness of each composite, although for some base/composite combinations the reductions were not significant. Glass ionomer also caused considerable reduction in surface hardness and cannot be recommended for use as a base under composite resin restorations.