Polyaxial bone anchor incorporating a two position saddle assembly
US10039572B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2015 |
| Grant date | Aug 7, 2018 |
| Priority date | — |
| Expiry date | Dec 22, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/7082
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A polyaxial bone anchor assembly, comprising: a threaded screw portion comprising a head end; a head body disposed concentrically about the head end of the threaded screw portion; and a saddle assembly disposed within the head body and selectively engaging the head end of the threaded screw portion; wherein, when the saddle assembly is translated within the head body into a first locked position, the head body is coupled to the threaded screw portion such that disengagement of the head body from the threaded screw portion is allowed; and wherein, when the saddle assembly is translated within the head body into a second locked position, the head body is coupled to the threaded screw portion such that disengagement of the head body from the threaded screw portion is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.