Novel primer composed of a silane coupling agent and multi-thiol for adhesion of versatile dental materials

Influence of the nanostructural characteristics of inorganic fillers on the physical properties of resin cements

Light-curing resin cements, each comprising one of five different inorganic fillers (non-porous and porous spherical SiO₂ particles, irregularly shaped glass and ZrO₂ particles, and porous ZrO₂ spheres), monomers, and polymerization initiators were prepared to determine the effect of filler morphology on the adhesive strength of the resin cement. The strength of adhesion to a computer-aided design/computer-aided manufacturing (CAD/CAM) resin block was investigated mechanically by measuring the tensile bond strength, flexural strength, and elastic modulus. The resin cement containing sub-micron porous ZrO₂ spheres had significantly higher tensile bond strength than the other resin cements. The resin cement containing the porous ZrO₂ spheres had markedly lower flexural strength and elastic modulus values than the resin cements containing SiO₂ and glass fillers.