Systems and methods for posterior dynamic stabilization
US8303631B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 17, 2009 |
| Grant date | Nov 6, 2012 |
| Priority date | — |
| Expiry date | Sep 23, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/7073
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system for providing dynamic stabilization and balance control at a vertebral motion segment has first and second bridge elements and at least one bias element. The bridge elements anchor to adjacent vertebrae with polyaxially adjustable anchoring members, and the bias elements attach to each bridge element to span between them. Each bias element has two fixation portions and a bias body extending between the fixation portions. Each bias element may comprise an elastically deformable material to provide dynamic stabilization with motion, or may comprise rigid material to provide rigid stabilization, and both bias element types may be included in one system. The bias elements are attachable to the bridge elements at discrete attachment locations, or at non-discrete attachment locations. Alternate embodiments may include three or more bridge elements on adjacent vertebrae, and multiple bias elements. A tensioning tool may provide adjustable tension to an elastically deformable bias element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.