Alfred S Cook

US Patent:

20200289180, Sep 17, 2020

Filed:

Mar 12, 2020

Appl. No.:

16/817144

Inventors:

- Dallas TX, US
David Louis Glaser - Villanova PA, US
Frederick Suh Song - Princeton NJ, US
Alfred Cook - Mount Dora FL, US
Mark D'Onofrio - Columbus OH, US

International Classification:

A61B 17/86
A61B 17/68

Abstract:

An assembly has a bone anchoring base and a screw. The bone anchoring base has at least one protrusion configured to be inserted in a hole arranged in the cancellous portion of a bone. The screw has a thread suitable for engaging with the cancellous portion of the bone. The protrusion is inwardly hollow and comprises an orifice at its distal free end, the screw being configured to be engaged through the protrusion and screwed in the cancellous portion of the bone through the orifice. The orifice is tapped at the pitch of the thread of the screw and the thickness of a distal wall is such that it is possible to arrange more than half of a turn of the threading therein, suitable for receiving the thread of the screw, such that, during the placement of the screw, the thread of this screw engages with said distal wall.