Patent ID: 9247967
Filing Date: 2016-02-02
CPC Classification: A61B

Claim Text:
1. A method comprising: implanting an anchor into a bone, wherein the anchor comprises a receiving portion and a screw, the receiving portion comprising a pair of spaced apart arms defining an inner surface defining a first cavity having a crown disposed therein and a U-shaped second cavity, the screw comprising a screw head contained within the first cavity such that a portion of the screw head engages the crown and another portion of the screw head engages the inner surface, wherein the anchor is a polyaxial screw that allows the screw to pivot with respect to the receiving portion, the anchor comprising a ring positioned within a recess in the first cavity that engages the screw head to retain the screw head in the first cavity, the ring being spaced apart from the crown when the screw head and the crown are positioned in the first cavity and the ring is positioned within the recess, wherein the receiving portion comprises a material having a greater yield strength than a material of the screw; selecting a rod from a group of rod types, containing at least a first rod and a second rod wherein the first rod has a different modulus of elasticity than the second rod; positioning the first rod within the second cavity, and selecting a set screw to secure the first rod to the receiving portion.