Patent ID: 9138277
Filing Date: 2015-09-22
Classification: A61B,A61F

Abstract:
1. A spinal fixing comprising a fixing part for fixing to a part of a subject's spine, the fixing part having a first end, the first end having a head that is at least partially spherical; an elongate extension, the elongate extension having a first end, the first end having a head that is at least partially spherical; a coupling body for receiving the first end of the fixing part and the first end of the elongate extension therein; and a washer located between the first end of the fixing part and the first end of the elongate extension in use, the washer having first and second opposing surfaces being concavely curved, the first surface facing the first end of the elongate extension in use and the second surface facing the first end of the fixing part in use, the radius of curvature of the first surface being smaller than the radius of curvature of the at least partially spherical end of the elongate extension such that the washer makes a circular line of contact with the first end of the elongate extension when the spinal fixing is assembled and the radius of curvature of the second surface being smaller than the radius of curvature of the at least partially spherical end of the fixing part such that the washer makes a circular line of contact with the first end of the fixing part when the spinal fixing is assembled.