Prepolymerized filler in dental restorative composite
US6890968B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2002 |
| Grant date | May 10, 2005 |
| Priority date | — |
| Expiry date | Sep 27, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K6/77
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A dental composite having high filler loading and low shrinkage thereby providing good strength and marginal integrity. Through the use of prepolymerized filler particles in combination with a structural filler and a nanofiller, the composite exhibits very low shrinkage and is useful in stress bearing restorations and in cosmetic restorations. The structural filler used is ground to a mean particle size of less than 0.5 μm and the nanofiller has discrete particles of a mean particle size less than 100 nm to improve handling and mechanical characteristics. The prepolymerized filler particles also allow for less viscosity and better handling characteristics of the composite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.