Device for connecting a longitudinal bar to a pedicle screw
US6371957B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1999 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Sep 22, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/7035
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to a device for connecting a longitudinal bar to a pedicle screw thereby forming a system for fixation of the spine. The device includes a body having an upper end, a lower end, a hole which is open at least towards the bottom and has an axis, and a through hole positioned perpendicular to the axis. The device also has a collet chuck mounted coaxially on the inside of the body in such a way that it can slide along the axis. The collet chuck has a through hole which is flush with the through hole of the body, and a chamber which faces at least downwards and is defined by tongues spring-mounted against the cylinder axis. When the collect chuck is inserted in the body, the through holes align to allow insertion of the longitudinal bar. The head of a pedicle screw can be clicked into the chamber from below by spring-action. The device is easy to use and makes it possible for the pedicle screw to be inclined within a certain range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.