Patent ID: 9155566
Filing Date: 2015-10-13
Classification: A61B

Abstract:
1. An orthopedic medical apparatus comprising: a receiver member defining a longitudinal passageway having upper and lower portions extending along a longitudinal axis, said lower portion including a pair of opposed substantially flat internal surfaces extending generally along said longitudinal axis, said receiver member defining a channel transversely intersecting said upper portion and configured for receipt of an elongated member; a crown member positioned within said lower portion, said crown member having an interior region at least partially bound by an interior lower surface, said crown member including a pair of opposite substantially flat external surfaces positioned adjacent and arranged substantially parallel with said pair of opposed substantially flat internal surfaces of said receiver member; and a bone anchor member having a head portion and a bone engaging portion extending from said head portion, said head portion at least partially positioned within said interior region and said longitudinal passageway, said head portion including an upper surface positioned proximately adjacent said interior lower surface; and wherein said receiver member, said crown member and said bone anchor member cooperate to substantially limit pivotal movement of said bone anchor member relative to said receiver member within a single plane.