Filler for dental composite materials
US7393883B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2004 |
| Grant date | Jul 1, 2008 |
| Priority date | — |
| Expiry date | Nov 14, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K6/893
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Ceramic filler compositions of customized shapes (FIGS. 1-30) according to the present invention, includes ceramic and glass-ceramic particles having a customized shape which provides mechanical locking within a resin matrix giving significantly improved fracture toughness performance for a resin/glass or ceramic composite system. The material has particular application as a tooth filling material with significantly improved wear resistance. The wide range of unique-shaped filler particles are produced using wet chemistry methods according to the invention of preparing the ceramic particles for use in a resin matrix composite material. Such composite materials have a very wide application, especially as a dental composite filling material for restoring a tooth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.