Percutaneous osseointegrated implant assembly for use in supporting an exo-prosthesis

Abstract

An implant assembly for a long bone is adapted to support an exo-prosthesis. The assembly includes a stem, a subdermal component and a percutaneous post. The stem has a proximal end that is adapted to be received in a surgically prepared medullary canal of the long bone, and a distal end having a surface that is adapted to promote bone ingrowth. The subdermal component includes a proximal portion that is adapted for attachment to the distal end of the stem, and a fixation surface that is adapted to promote soft tissue fixation. The percutaneous post has a proximal end that is adapted to be attached to the subdermal component.

What is claimed is: 
     
         1 . An implant assembly for a long bone having a longitudinal axis, which assembly is adapted to support an exo-prosthesis, said assembly comprising:
 (a) a stem having:
 (i) a proximal end that is adapted to be received in a surgically prepared medullary canal of the long bone; 
 (ii) a distal end having a surface that is adapted to promote bone ingrowth; 
   (b) a subdermal component having a proximal portion that is adapted for attachment to the distal end of the stem and a fixation surface that is adapted to promote soft tissue fixation; and   (c) a percutaneous post having a proximal end that is adapted to be attached to the subdermal component wherein the distal end of the stem and the proximal portion of the subdermal component cooperate to define a collar, wherein the collar includes a proximal surface perpendicular to an osteotomy created by a cut through the long bone, and wherein the proximal surface is coated with a porous coating configured to promote bone ingrowth.