5% TiO2 and 1.5% ZrO2 groups. The optimal filler concentrations to enhance the flexural strength of PMMA resin were between 3-5% ZrO2, 1.5% TiO2, and 3-7% E-glass fibre. Furthermore, for all composites, a filler concentration of 3 wt.% and above would significantly improve hardness.Increasing numbers of studies seek to characterize the different…[Read more]