Method for polyaxial screw system
US8834529B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2011 |
| Grant date | Sep 16, 2014 |
| Priority date | — |
| Expiry date | Feb 28, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/701
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for mounting a polyaxial screw into a bone includes rotating a drive cap so that a screw mounted to the drive cap is screwed into a bone, the drive cap having a socket in which a portion of the screw is pivotably disposed, at least a portion of a collet being disposed within the socket between the screw and the drive cap. A stabilizing structure and a fastener are positioned onto a shaft projecting from the drive cap. The fastener is advanced along the shaft so as to push a portion of a compression cap against the collet which in turn wedges the collet within the socket of the drive cap and causes the collet to bias against a portion of the screw, thereby locking the position of the screw, the collet, and the drive cap relative to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.