Abstract
Sliding frictional wear of 5 dental restorative materials, including composite resin, was investigated using a new sliding frictional wear testing instrument and the wear mechanism between composite resin and other materials was discussed. Ag-Pd-Au alloy, Ni-Cr alloy and porcelain in addition to two composite resins were prepared as the wear test specimens. Furthermore, two types of heat-curing composite resins were used as the opposing material of the wear test specimen. These composite resins were made from Bis・GMA-Tri・EDMA mixed monomer and silanized conventional filler (1.9 and 4.8μm average particle size). The filler content was 60 wt% of the specimen. All test specimens of other materials, except composite resin, were made by the methods recommended by manufacturer.
From the results of the wear test, it was suggested that the wear behavior between composite resin and various dental restorative materials was influenced by the size of filler particles in the composite. When filler particle size was large, the wear resistance of the composite resin increased markedly. Ag-Pd-Au alloy, Ni-Cr alloy and porcelain showed more wear resistance when opposed to composite resin with large filler particles.
