Effect of filler content and waiting time before light-curing on mechanical properties of dual-cured cements

This study aimed to investigate the effect of filler content and the time spent before light-curing on mechanical properties of dual-cured cements. Experimental dual-cured resin cements were formulated with 60, 65 or 68wt% of filler. The viscosity of experimental cements was measured using a digital viscometer. Bar-shaped specimens (25 x 2 x 2 mm) were built-up, while the light-curing was started immediately or 5 minutes after the insertion of cements into the mold (n = 7). A three-point bending test was performed and the values of flexural strength and elastic modulus were measured. The Vickers hardness of fractured was measured on the cements surface.