Surgical assembly, and bone anchor screw and device for extending one such screw that belong to said surgical assembly
US10265105B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2015 |
| Grant date | Apr 23, 2019 |
| Priority date | — |
| Expiry date | Mar 25, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/7076
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The surgical assembly includes: a bone anchorage screw having an anchorage portion for anchoring in a vertebral column, and a head in the form of a socket; and an extension device adapted to fit over the socket of the bone anchorage screw for forming a longitudinal extension thereto. The extension device includes a first tubular element referred to as an “inner tube”, of inside diameter greater than or equal to the inside diameter of the socket of the bone anchorage screw, and extended longitudinally by two diametrically opposite branches, forming jaws for clamping onto the outside surface of the socket so as to lock onto the socket, and a second tubular element referred to as an “outer tube”, mounted to slide along said inner tube. The outer tube is extended longitudinally by two diametrically opposite branches having their free ends in register with the free ends of the two branches of the inner tube, and being provided with retaining means for co-operating with complementary retaining means arranged on the socket to prevent the branches from moving apart from each.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.