Spinal implant
US8308801B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2008 |
| Grant date | Nov 13, 2012 |
| Priority date | — |
| Expiry date | Jun 16, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00796
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Provided is an intervertebral disc prostheses for installation in a spinal column between superior and inferior vertebral bodies. A first intervertebral plate engages one or both of the inferior vertebral endplate and the inferior ring apophysis of the superior vertebral body. A second intervertebral plate engages one or both of the superior vertebral endplate and the superior ring apophysis of the inferior vertebral body. A biaxial rolling-contact core is located between the intervertebral plates. The core includes a convex upper surface and a convex lower surface. The upper surface is curved around a first axis and the lower surface is curved around a second axis that is rotated relative to the first axis. The core is capable of rolling translation relative to the first intervertebral plate along the upper surface and in a first direction, and rolling translation relative to the second intervertebral plate along the lower surface and in a second direction. A flexure constrains the biaxial rolling-contact core to a rolling translation without sliding in at least one of said first direction and said second direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.