Dental composition comprising nanoparticles that provide a refractive index difference between a polymerizable resin and a filler

摘要

A dental composition and a method of blending the dental composition are described. In one embodiment, the dental composition includes a polymerizable resin that includes one or more ethylenically unsaturated monomers or oligomers and nanoparticles. The nanoparticles have a refractive index of at least 1.600 and an average particle size of discrete particles or aggregates of 100 nm or less. The dental composition further comprises an inorganic metal oxide filler having an average particle size of discrete particles or aggregates of at least 200 nm. The nanoparticles are present at a concentration that provides a refractive index difference between the cured polymerizable resin and the inorganic metal oxide filler, whereby the contrast ratio of the dental composition is at least 40.