Method of making a bonescrew
US6551323B2 · kind B2 · utility
141Cited by
5References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2001 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Jul 26, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/00526
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A screw for use in spinal and other surgical procedures has a tapered core and fixed pitch threads. The threads have a compound curved inferior surface and constant width crest. The screw may be provided with a helical thread in which at least the lead thread adjacent to the screw tip is ledged and the following threads have sharp apices. A method of making the screw requires two tool bits making two different angular cuts to the inferior surface of the threads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.