Patent ID: 7875060
Filing Date: 2011-01-25
Classification: A61B

Abstract:
1. A bone anchor assembly for engaging an elongated plate element comprising an integrated semispherical end, said assembly comprising: a bone engaging anchor having a body portion configured to engage a bone, a spherical top end and a sharp bottom end; a hollow spherical component configured to grip an outer surface of said spherical top end and lock said spherical top of said bone engaging anchor; a head with a spherical outer surface configured to sit upon a spherical outer surface of said spherical component and configured to receive said semispherical end of said elongated plate element upon its spherical outer surface; a locking screw and wherein said head comprises an opening configured to receive said locking screw for securing said semispherical end to said head and said head to said spherical component; and wherein said locking screw comprises a breakable extension member that is designed to be broken off.