Jan W. van Dijken, Eystein Ruyter and Roy Ivar Holland | October 26th 1986
The percent pore area and the mean pore size were measured in specimens made of nine brands of composite resin restorative materials. The overall percent porosity ranged from 0.01 to 4.5%
Eystein Ruyter and Harry Øysæd | October 26th 1982
Creep characteristics of four light activated composite of different composition were determined at 37 and 50 degrees C. The creep properties were compared with the composition of the materials.