Intervertebral disk arthroplasty device
US5425773A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1994 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Apr 5, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00976
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A disk arthroplasty device (310) is provided for replacement of a spinal disk. The device is implantable into a resected disk space and is formed with ball (346) and socket (326) members and shaped to provide lateral bending and backward extension of up to about 5.degree. and forward flexion of up to about 15.degree.. Four embodiments (10), (110), (210) and (310) permit up to about 5.degree. axial rotation and a fifth embodiment (410) permits unrestricted axial rotation. Metal insert cups (70) and (170) are provided for attaching to the device surfaces and are convexly shaped along one axis to conform to the natural contours of the top and bottom vertebra surfaces. The metal insert cups (70) and (170) provide tensile support to the structure and provide for the attachment of additional structures for retaining the device in position after implantation into a disk space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.