Polyaxial screw with improved locking
US6869433B2 · kind B2 · utility
389Cited by
11References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 11, 2002 |
| Grant date | Mar 22, 2005 |
| Priority date | — |
| Expiry date | Feb 28, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/7032
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A polyaxial pedicle screw assembly incorporates a concave portion on a receiver which mates with a convex surface on a head of the screw to form a ball joint. The radius of at least a portion of the concave surface is less than a radius of the mating convex portion whereby to create an interference fit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.