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Restorative resins: abrasion vs. mechanical properties
Author(s) -
JØRGENSEN KNUD DREYER
Publication year - 1980
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.1980.tb01267.x
Subject(s) - abrasion (mechanical) , materials science , composite material , composite number , porosity , filler (materials) , surface roughness , surface finish , vickers hardness test , microstructure
– The purpose of the present work was to examine whether it is possible by simple and reliable laboratory tests to evaluate the abrasion by food of Glass 1 restorative resins. The results point to the following main conclusions: for the smooth‐surface resins, i. e. the micro‐filled composites and the unfilled resins, the Wallace hardness test appears to be a valid parameter for abrasion; the greater the depth of penetration of the Vickers diamond of this apparatus, the more severe abrasion is to be expected. The mode of abrasion in this type of resin is scratching. Porosity in the resins strongly enhances the abrasion. For the rough‐surface resins, i. e. the conventional composites, a dual effect of the filler particles was concluded. The filler particles on the one hand protect the matrix against abrasion, but cause, on the other hand, in time an increase of the surface roughness of the composite and thereby via increased friction an increase of the abrasion. Considerations on possible ways to improve the present‐day restorative resins are presented, It is stressed that the results obtained refer only to abrasion of Class 1 fillings by food.