×

Intervertebral disc prosthesis with transversally arched, curved cylindrical articulation surfaces for the lumbar and cervical spine

  • US 20060235531A1
  • Filed: 04/18/2006
  • Published: 10/19/2006
  • Est. Priority Date: 10/18/2004
  • Status: Active Grant
First Claim
Patent Images

1. Intervertebral disc prosthesis for total replacement of an intervertebral disc within a lumbar and cervical spine, comprising articulating sliding partners, wherein an upper sliding partner firmly assembles to an upper vertebral body and a lower sliding partner firmly assembles to a lower vertebral body and an in-between the sliding partners located sliding area, wherein a) a first of such sliding partners is constructed in such a manner, that a side opposite of a side for assembly with a vertebral body has a convex curvation (convex articulation area, convexity), and a geometry of the convexity is defined it correlating to a segment of a cylinder along its longitudinal axis from right to left lateral with a transversal ventrally directed arched curvation, wherein the convexity is surrounded dorsally, ventrally and laterally at both sides by an edge, and b) a second of such sliding partners is constructed in such a manner, that the opposite side of the side for the assembly with a vertebral body has a concave articulation area (concavity) and a geometry of the concavity is defined by having a recess corresponding to the convexity of the first sliding partner, and the concavity is surrounded dorsally, ventrally and to both lateral sides by an edge, and c) the edges of both sliding partners have an outwardly opening angle (aperture angle) towards each other, wherein a. no inclination of the sliding partners towards each other in lateral direction being possible, and b. the maximal possible motion of the sliding partners in dorsoventral direction is limited by a gap-closure of the edges of the two sliding partners, and d) the rotation of the sliding partners towards each other is limited by the tolerance between convexity and concavity right and left laterally of the transversally curved cylindrical articulation areas.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×