Anterior cervical vertebral stabilizing device
US5904683A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1998 |
| Grant date | May 18, 1999 |
| Priority date | — |
| Expiry date | Jul 10, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/888
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An implantable device for affixing to the anterior side of cervical vertebrae for stabilizing the cervical vertebral column. A plate has an anterior surface and a posterior surface and a plurality of through holes open at the anterior surface and at the posterior surface. Each hole has an anterior portion having a first diameter and a posterior portion having a second diameter. The second diameter is smaller than the first diameter, and the anterior portion of the hole is internally threaded. A bone screw has a threaded shank having a major diameter smaller than the second diameter of the through hole of the plate. The bone screw also has a head having a major diameter greater than the second diameter of the through hole of the plate and smaller than the first diameter of the hole of the plate. A locking cap has an exterior thread and is sized to be threadedly received within the anterior portion of the through hole of the plate while the head of the bone screw is disposed within the through hole. The locking cap is provided for engaging and frictionally locking the head of the bone screw to the plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.