Research Article

Reinforcement of PMMA Denture Base Material with a Mixture of ZrO2 Nanoparticles and Glass Fibers

Figure 4

SEM of fracture surfaces of flexural test specimens. (a) Control-0% nano-ZrO2 + 0% GFs; (b) 5% nano-ZrO2 + 0% GFs; (c) 4% nano-ZrO2 + 1% GFs; (d) 3% nano-ZrO2 + 2% GFs.