Continuous fiber-reinforced dental restorations
US6334775B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1999 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Feb 16, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K6/889
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Continuous fibers, resin-fiber pastes, or continuous fiber-reinforced preforms are inserted into tooth cavities to form high-strength dental restorations. The fibers may be mixed or coated with a resin monomer and may be used with fillers such as fluoride-releasing fillers and colorants. The resin-fiber mixture may be hardened into preforms suitable for inserting into tooth cavities. Conventional filling materials such as composite resins and glass ionomers may be used to complete the restoration. Other applications include endodontic posts, retention pins, provisional restorations, and indirect restorations. Fiber reinforcement results in strength, toughness and elastic modulus (stiffness) several times greater than those of currently available direct-filling composite resins. The fiber performs are easily handled and placed into tooth cavities; the restorations are aesthetic and wear compatible, and release fluoride. The final restoration has significantly reduced polymerization shrinkage because the fiber preform can be pre-hardened and therefore will shrink little during hardening of the final restoration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.