Journal of Dental Research, Vol 63, 1173-1175, Copyright © 1984 by International & American Associations for Dental Research Online Journals
Comparative in vitro sliding-wear study of conventional, microfilled, and light-cured composite restoratives
S. L. Rice, W. F. Bailey, S. F. Wayne and J. A. Burns
The sliding-wear behavior of a number of commercially available microfilled
and light-cured composite restoratives has been investigated and compared
with the wear characteristics of conventional composites. The surface
profiles of the composite restoratives, both pre- and post-test, have also
been examined in order to study material attrition processes. The results
indicate that: (1) microfilled composites are significantly more resistant
to sliding wear than are restoratives containing conventionally-sized
filler particles; (2) light-cured, microfilled composites exhibit a lower
rate of sliding wear than do self-curing, microfilled restoratives; and (3)
the wear process leads to an increase in surface roughness for all
materials tested, but microfilled materials display lower surface roughness
values, both before and after sliding-wear tests, than do restoratives
containing conventional-sized filler particles.
