Arrangement for use in a system with a range of dental screws, and the range of dental screws
US6419489B1 · kind B1 · utility
36Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 1999 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | May 14, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C8/0022
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system which provides a range of dental screws. The same screw tightener is used to tighten different screws, of different constructions. Each screw is provided with an internal recess which operates with the screw tightener. The recess has elements extending inward toward the center axis of the screw which cooperate with the screw tightener. Bearing capacity is provided by a wedging action between the screw tightener and recess, and a driving function occurs through actually extending elements within the recesses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.