Bone anchor assemblies
US10226282B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2017 |
| Grant date | Mar 12, 2019 |
| Priority date | — |
| Expiry date | Aug 31, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/7037
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A bone anchor assembly includes a bone anchor, a receiver member for receiving a spinal fixation element to be coupled to the bone anchor, a compression member positioned within the receiver member, and a closure mechanism including an outer set screw and an inner set screw. The outer set screw delivers a distal force to the compression member to fix the bone anchor relative to the receiver member. The proximal surface of the compression member has a shape configured to restrict deformation of the compression member arms including motion of the compression member arms relative to each other. The distal surface of the outer set screw has a shape that is complementary to the shape of the proximal surface of the compression member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.