Effects of Silica Nanoparticles and Silica-Zirconia Nanoclusters on Tribological Properties of Dental Resin Composites

Figure 6

SEM micrographs of (a) silica nanoparticle nanoclusters, (b) surface of silica nanoclusters, (c) silica-zirconia nanoclusters, and (d) surface of silica-zirconia nanoclusters.

(a)

(b)

(c)

(d)