Composite material posterior dynamic stabilization spring rod
US9445844B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2010 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Feb 27, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/7028
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention provides a Posterior Dynamic Stabilization (PDS) device that allows elongation, which is a critical requirement for a PDS device as it allows pedicles to travel naturally in flexion, extension, and lateral bending of the spine. This interpedicular travel preserves a more natural center of rotation unlike other PDS devices that simply allow bending. In particular, the invention involves a PDS spring rod, wherein the helix is created with composite flow molding (CFM) technology and comprises a polymer matrix reinforced with continuous carbon fibers, wherein the fibers are oriented substantially parallel to the centerline of the helix, thereby creating a high strength spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.