Etched porcelain veneer crowns
US4813874A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1987 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | Mar 9, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C5/30
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for preparing and fitting a partial or full veneer etched porcelain crown on a tooth preparation. The method includes the steps of preparing a veneer porcelain crown; etching the interior surface of the porcelain crown and the remaining tooth enamel of the tooth preparation; applying a silane-coupling agent to the etched surface of the porcelain crown; applying a layer of dentin bonding agent to the exposed dentin of the tooth preparation; applying a layer of unfilled resin to the silane-coupled etched porcelain surface and to the etched enamel and dentin bonding agent on the tooth preparation; applying a layer of bonding resin to overlay the unfilled resin on the tooth preparation; positioning the veneer crown on the tooth preparation; and curing the bonding resin. The laminate structure thus formed has a natural appearance and is highly fracture resistant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.