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Dental compositions containing nanoparticles providing the difference between the refractive indices of the polymerizable resin and the filler
Dental compositions containing nanoparticles providing the difference between the refractive indices of the polymerizable resin and the filler
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机译:包含纳米颗粒的牙科用组合物可提供可聚合树脂和填料折射率之间的差异
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摘要
Dental compositions and methods of formulating a dental composition are described. In one embodiment, the dental composition comprises a polymerizable resin comprising one or more ethylenically unsaturated monomers or oligomers and nano-particles. The nanoparticles have a refractive index of at least 1.600 and an average discrete or aggregate particle size of no greater than 100 nm. The dental composition further comprises inorganic metal oxide filler having a discrete or aggregate average particle size of at least 200 nm. The nanoparticles are present at a concentration to provide a refractive index differential between the cured polymerizable resin and inorganic metal oxide filler such that the contrast ratio of the dental composition is at least 40.
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