Modular polyaxial bone screw and plate
US7491221B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 23, 2004 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Apr 27, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/8695
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An orthopedic bone plate system having a bone plate for placement adjacent one or more vertebral bodies. The bone plate has a first aperture extending along a longitudinal axis and an upper and lower surface. The bone plate system further includes a sliding element having a top portion and a base portion and an aperture extending along a central axis. The sliding element is adapted for being placed adjacent to the bone plate aperture. The system preferably includes a bone fastener having a longitudinal axis which is adapted for connecting the bone plate to a vertebral body. The bone fastener includes a stem and a bone engaging portion. The diameter of the stem may be less than a cross section of the sliding element aperture so that the stem may be oriented within the sliding element aperture at a plurality of angles. The system may further include a stopping element engageable with the sliding element base portion. The stopping element includes a bore adapted for receiving the stem portion of the bone fastener. The orthopedic bone plate system may also include a locking element engageable with the top portion of the sliding element and having a bore adapted for receiving the stem p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.