Diamond-like carbon coated dental retaining screws
US6447295B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2000 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Apr 17, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B33/06
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to a coated dental screw for retaining and securing components of a dental prosthetic implant stack. The screw is coated with a hard carbon coating/film to provide a low friction surface finish which advantageously results in improved preloading of the screw, and hence a high clamping force between the components of the dental prosthetic implant stack. The coating can comprise diamond-like carbon (DLC), amorphous diamond, crystalline diamond, or a combination thereof. The dental screw can include abutment retaining screws and prosthesis retaining screws. Other advantages provided by the hard carbon coating include high mechanical surface hardness, biocompatibilty, corrosion resistance, chemical inertness and low cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.