Bone screw
US6585740B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2001 |
| Grant date | Jul 1, 2003 |
| Priority date | — |
| Expiry date | May 25, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B35/041
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The central portion of the screw according to the invention has a series of segments varying in diameter, typically having a segment located near the screw head with a large diameter, a segment located near the front portion with a small diameter, and intermediate segments tapering in the direction of the segment with the small diameter. A continuous thread extends along the central portion from the screw head to the screw tip where the thread has a substantially uniform outside diameter along the entire length of the central portion. The screw, which is particularly well-suited as a pedicle screw, has improved resistance to tearing, cutting and bending, and, largely independent of bone quality, good hold in bone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.