Polyaxial bone anchor with compound articulation and pop-on shank
US10194951B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2012 |
| Grant date | Feb 5, 2019 |
| Priority date | — |
| Expiry date | Mar 20, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/864
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A polyaxial bone screw assembly includes a threaded shank body having an integral shank head receivable in a one-piece receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. A compression insert (some with an independent tool lock, lock and release feature and/or friction fit feature) and a split retaining ring articulatable with respect to both the shank head and the receiver (prior to locking) cooperate with the receiver to provide for pop- or snap-on assembly of the shank with the receiver either prior to or after implantation of the shank into a vertebra.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.