Patent ID: 9289244
Filing Date: 2016-03-22
CPC Classification: A61B,Y10T

Claim Text:
1. A polyaxial bone anchor, comprising: a housing having an upper end, a lower end and a bore extending through the housing from the upper end to the lower end, the bore opening out at the lower end at a lower opening, the housing including a channel configured for receiving an elongate stabilization member therethrough which extends from a first side surface of the housing to a second side surface of the housing opposite the first side surface transverse to the bore; and a bone screw including a head and a shank extending from the head, the head of the bone screw positionable in the housing with the shank extending from the lower end of the housing; wherein the lower opening of the bore defines an angulation limit of the bone screw for each azimuthal angle around a longitudinal axis of the bore; and wherein the lower opening of the bore is generally V-shaped, the V-shape having a closed end proximate the longitudinal axis, an open end distal to the longitudinal axis, and angled side walls connecting the closed end and open end that define a low-angulation direction proximate their intersection at the closed end and define a high-angulation direction opposite the low-angulation direction at the open end.