Interference bone-fixation screw with multiple interleaved threads
US5443509A · kind A · utility
329Cited by
21References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1992 |
| Grant date | Aug 22, 1995 |
| Priority date | — |
| Expiry date | Dec 10, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S606/916
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A bone fixation screw employs plural interleaved and axially symmetrical spiral threads. The threads are machined at the screw tip to form symmetrically disposed leading cutting edges. An interference-screw embodiment has a central axial cannula and a female hexagonal drive socket. The plural threads assist in unbiased starting and fast advance of the screw.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.