Polyaxial facet fixation screw system with fixation augmentation
US8998966B2 · kind B2 · utility
4Cited by
39References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2011 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | Feb 28, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/8655
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A screw system includes a screw and a washer assembly captive to the screw. The washer assembly is polyaxially pivotable relative to the screw. The screw may be freely rotated in one direction relative to the washer assembly, but frictionally binds with the washer assembly when rotated in a second direction. Various auxiliary fixation features are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.