Polyaxial pedicle screw having a loosely coupled locking cap
US6113601A · kind A · utility
519Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1998 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Jun 12, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/7032
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A polyaxial pedicle screw for use with rod implant apparatus includes a rod receiving body, a screw having a curvate head, a compression element, and a means for loosely and reversibly maintaining a coupled relationship between the compression element and the screw head during angulation thereof relative to the rod receiving body, while still permitting compressive locking of the assembly in a specific orientation by means of a compressive force applied by a rod onto the compression element and the head of the screw.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.