Journal of Dental Research, Vol 55, 244-251, Copyright © 1976 by International & American Associations for Dental Research Online Journals
Working time of polymeric restorative materials
P. H. Jacobsen
The validity of determining the working times of polymeric restorative
materials with the use of rheologic methods in the laboratory has been
investigated by measuring the adaptation of polymeric restorative materials
to artificial cavities when inserted at 30-second time intervals during
their setting reactions. There was significant deterioration in adaptation
during the working times which suggests that small changes in viscosity
early in the setting reactions radically affect the materials' mobility.