Modular polyaxial pedicle screw assembly with split ring
US11369417B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2021 |
| Grant date | Jun 28, 2022 |
| Priority date | — |
| Expiry date | Jun 8, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/7044
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A modular head polyaxial pedicle screw assembly has a pedicle bone screw, a tulip, a split locking ring and a saddle. The screw has a head and a threaded shank. The split locking ring has a split ring body with one or more positioning tabs extending from a first surface of the split ring body. The split ring locking ring is configured to be placed internal of the tulip positioned in a recess, groove or undercut of an inner surface of the tulip. Upon assembly of the pedicle screw into the tulip, at least a maximum diameter of the head is positioned above the recess, groove or undercut allowing the split locking ring to be inserted into the recess or groove thereby securing the pedicle screw inside the tulip wherein the head of the pedicle screw abuts the one or more positioning tabs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.