초록 ▼

The present invention provides a resin-based dental restorative that exhibits low volumetric shrinkage, high filler loading and the high strength required for load bearing restorations, yet maintains a glossy appearance, even after substantial wear. To this end, a dispersant is mixed with a methacry

The present invention provides a resin-based dental restorative that exhibits low volumetric shrinkage, high filler loading and the high strength required for load bearing restorations, yet maintains a glossy appearance, even after substantial wear. To this end, a dispersant is mixed with a methacrylate resin and a structural filler having a mean particle size between about 0.05 .mu.m and about 0.50 .mu.m. The composite is useful in stress bearing restorations and in cosmetic restorations. The structural filler used is typically ground to a mean particle size of less than 0.5 .mu.m and also includes a microfill having a mean particle size less than 0.05 .mu.m to improve handling and mechanical characteristics. The preferred dental composites maintain their surface finish even after substantial use and also have the strength properties of hybrid composite resins.

대표청구항 ▼

[ What is claimed is:] [1.]1. A dental restorative composition comprised of:between about 10% by volume and about 70% by volume of a ground structural filler having a men particle size between about 0.05 .mu.m and about 0.50 .mu.m, wherein the ground structural filler contains less than 50% by volum

[ What is claimed is:] [1.]1. A dental restorative composition comprised of:between about 10% by volume and about 70% by volume of a ground structural filler having a men particle size between about 0.05 .mu.m and about 0.50 .mu.m, wherein the ground structural filler contains less than 50% by volume of particles above 0.5 .mu.m in diameter, mean particle size;a polymerizable acrylic monomer; anda phosphoric acid ester dispersant.