Hip implant with porous body

  • US 8,506,642 B1
  • Filed: 04/24/2006
  • Issued: 08/13/2013
  • Est. Priority Date: 05/27/2003
  • Status: Active Grant
First Claim
Patent Images

1. A hip implant, comprising:

  • a neck body having a proximal end that connects with an acetabular component, having a distal end surface with an elongated protrusion that extends outwardly therefrom, and being formed of solid metal; and

    a bone fixation body having an elongated tapering shape and being formed as a completely porous metal structure that extends throughout an exterior and an interior of the bone fixation body and that includes a proximal end that engages the distal end surface of the neck body at an interface,wherein the interface has a trapezoidal cross-sectional shape in which the trapezoidal cross-sectional shape continues and tapers in a distal direction toward a distal end of the bone fixation body,wherein the bone fixation body is made separately from the neck body, and the bone fixation body is bonded to the neck body after the bone fixation body is made separately from the neck body,wherein the elongated protrusion of the neck body forms a core for the bone fixation body and tapers and extends into an opening of the bone fixation body such that the porous metal structure completely surrounds and engages an exterior surface of the elongated protrusion that extends into the bone fixation body,wherein the elongated protrusion is shaped to provide an anti-rotational interface between the neck body and the bone fixation body, andwherein the porous structure of the bone fixation body has a size and a shape that emulate a size and a shape of a porous structure of natural human bone.

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