Bottom loading bone anchor assemblies with drag retaining ring and related methods
US11439437B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2021 |
| Grant date | Sep 13, 2022 |
| Priority date | — |
| Expiry date | Jun 9, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/704
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Bottom-loading bone anchor assemblies and components thereof are disclosed that have a reduced profile and can be utilized with bone screws of various size. Bone anchor assemblies of the present disclosure can include a receiver member, a drag retaining ring, and a shank. The retaining ring and shank can be inserted proximally into a bore of the receiver member. The drag ring can have a base and a walled portion extending proximally therefrom. The drag retaining ring can be disposed in a groove of the receiver member with the base forming a seat for the shank head that can hold the shank within the receiver. The walled portion of the drag retaining ring can impart a drag force on the shank head seated in the base to prevent unintended movement between the shank and the receiver member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.