Semi-constrained screw and spinal plate assembly
US8574272B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2009 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Oct 29, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/8057
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A semi-constrained screw and a cervical plate assembly that engages to a cervical area of the human vertebrae system are disclosed. The semi-constrained screw and cervical plate assembly includes a cervical plate and one or more semi-constrained bone screws. Each semi-constrained bone screw includes an elongated shank, which is mechanically and releasably coupled to a head portion. The head portion includes one or more threaded segments which define one or more slits therebetween. As the semi-constrained bone screw is driven through the screw opening in the cervical plate and into the bone, the head portion allows poly-axial movement of the shank relative to the head portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.