Patent ID: 8021430
Filing Date: 2011-09-20
Classification: A61F,Y10S

Abstract:
1. An implant for insertion between a first vertebra and a second vertebra, the first vertebra having a generally vertically extending first peripheral wall and a first cortical bone endplate and the second vertebra having a generally vertically extending second peripheral wall and a second cortical bone endplate, wherein the implant comprises: a first terminal part defining a trailing face, a first bearing surface adapted to bear against a portion of the cortical bone endplate proximate to the first peripheral wall, and an opposite second bearing surface adapted to bear against a portion of the second cortical bone endplate proximate to the second peripheral wall; an elongated body including a central part extending from said first terminal part, said central part having an upper bearing surface and a lower bearing surface, said elongated body terminating in a second terminal part opposite said first terminal part, said second terminal part including an anti-expulsion feature and having an insertion face extending from said upper bearing surface to said lower bearing surface, said insertion face including a curved surface extending from said upper bearing surface to said lower bearing surface, said central part having a longitudinal axis extending through said trailing face of said first terminal part and said insertion face of said second terminal part, and having a cross section in a first plane extending through said upper bearing surface and said lower bearing surface, and along the longitudinal axis, the first plane bisecting said upper bearing surface in two halves, wherein at least a portion of said cross section is convex at said upper bearing surface and said lower bearing surface; and a first side and an opposite second side, said first side and said second side extending along said first terminal part, said elongated body, and said second terminal part, portions of said first side and said second side being substantially flat, said substantially flat portions intersecting a second plane that is perpendicular to the first plane and extends through said insertion face and said trailing face, said substantially flat portion of said first side extending along a third plane and said substantially flat portion of said second side extending along a fourth plane, wherein the third and fourth planes are symmetrical about the longitudinal axis and transverse to said insertion face.