Pedicle screw with a closure device
US8075598B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2009 |
| Grant date | Dec 13, 2011 |
| Priority date | — |
| Expiry date | Feb 13, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/7031
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A pedicle screw with a closure device (16) for securing a rod (10) for stabilization of the vertebral column comprises a screw-in part (2), a head part (3) provided on the screw-in part (2), and a U-shaped recess (4) disposed in the head part (3), which recess is formed by the inner surfaces (5, 6) of two arms (7, 8) and a bottom surface (9) connecting the two inner surfaces. The rod (10) is insertable into this recess, and is held by the closure device (16). The rod (10) is provided with ridges (12) and grooves (13) running transversely with respect to the rod axis (11). Likewise provided with corresponding ridges (14) and grooves (15) is the bottom surface (9). The closure device (16) comprises a support element (17), which is insertable between the two arms (7, 8). Disposed in a displaceable way on the support element (17) are two sliding parts (20, 21), which, via a movement mechanism, are able to be brought from a position of being pushed against each other into a position of being pushed apart, in which pushed-apart position the two end regions (29), remote from one another, of the two sliding parts (20, 21) each project into a recess (23, 24) of the two arms (7, 8) in the st…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.