Patent ID: 7789914
Filing Date: 2010-09-07
Classification: A61F,Y10S

Abstract:
1. An implant for insertion between a first vertebra and a second vertebra, the first vertebra having a first cortical bone endplate and the second vertebra having a second cortical bone endplate, wherein the implant comprises: a first terminal part defining a first bearing surface substantially planar and adapted to bear against the first cortical bone endplate, an opposite second bearing surface substantially planar and adapted to bear against the second cortical bone endplate, and a trailing face extending from said first bearing surface to said second bearing surface; a second terminal part opposite said first terminal part, said second terminal part defining a third bearing surface adapted to bear against the first cortical bone endplate, a fourth bearing surface adapted to bear against the second cortical bone endplate, and an insertion face extending arcuately from the third bearing surface to the fourth bearing surface, said third bearing surface and said fourth bearing surface include an anti-expulsion feature; an elongated body including a central portion extending from said first terminal part to said second terminal part, said central portion having a longitudinal axis extending through said insertion face and said trailing face, said central portion having an upper bearing surface, a lower bearing surface, and 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, at least a portion of said cross section being convex at said upper bearing surface and said lower bearing surface; and a first side extending between said insertion face and said trailing face and an opposite second side extending between said insertion face and said trailing face, portions of said first side and said second side intersecting a second plane that is perpendicular to the first plane and extends through said insertion face and said trailing face, said portions of said first side and said second side being parallel to one another and perpendicular to said insertion face.