Patent ID: 8267969
Filing Date: 2012-09-18
Classification: A61B

Abstract:
1. A bone screw system, comprising: a bone screw including: a coupler including: a seat having a first end and a second end; the seat including: a cap configured to close the top opening of the seat; the cap having a top surface and a bottom surface interconnected by an outer surface and an inner surface; the inner surface defining a threaded set screw receiving portion; the outer surface defining at least one seat-engagement feature for engagement with the cap receiving portion of the seat; a set screw having a top surface and a bottom surface interconnected by a threaded outer surface; the set screw configured to be threadingly engaged with the set screw receiving portion of the cap; a retainer configured to retain the coupler inside the seat; and a rod having a first end and a second end; at least a portion of the rod configured to connect to the rod receiving portion of the coupler; and at least a portion of the screw head section disposed inside the screw head receiving portion of the coupler; the screw being inserted in the bottom opening of the seat and the coupler being retained inside the seat via the retainer pressed between the coupler and the seat; at least a portion of the rod being removably connected to the rod receiving portion of the coupler; the cap being removably inserted into the cap receiving portion of the seat and retained therein via the at least one seat-engagement feature on the outer surface of the cap; the set screw being disposed in the set screw receiving portion of the cap; the rod being disposed in the rod channel with the cap disposed in the cap receiving portion of the seat; upon advancement of the screw, the bottom surface of the set screw contacting at least a portion of the rod within the seat; and the bone screw and rod being locked into position with advancement of the set screw into the seat.