Adhesive bond strength control for orthodontic brackets
US4948366A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1989 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Aug 3, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31612
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Ceramic orthodontic brackets are bonded to teeth with dental adhesive. Each bracket has a silica-containing layer on the tooth facing base of the bracket. A silanation layer is also applied to the base. The silanation layer is deposited from a solution containing a first silane coupling agent reactive with organic resin in the adhesive and a second silane coupling agent having a non-reactive orgainc group. Collectively the silanes occupy all of the silanation sites on the silica-containing substrate. By controlling the ratio of reactive and non-reactive silane coupling agents, the bond strength between the substrate and the adhesive can be controlled. A set of ceramic orthodontic brackets can have uniform force of removal by varying the porportions of silane coupling agents on the brackets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.