Impacted orthopedic support implant

Abstract

This invention relates to a porous bone implant ( 10, 110 , and 210 ), a method of manufacturing the implant and a method of orthopedic treatment. The mesh implant can be manufactured using extrusion techniques and a variety of cutting and machining processes to provide the implant with the desired structural features and in the required dimensions to be matingly received within the bone defect or cavity. The implant can be used to strengthen bone structures and support bone tissue adjacent to a defect of cavity. Thus, the implant can be used to provide improved treatment of patients having bone defects or diseases with decreased postoperative pain and a shorter recovery time.

1 .- 18 . (canceled) 
   
   
       19 . An orthopedic implant, comprising:
 a first end portion including a first support band and an opposite second end portion including a second support band, said first and second support bands each extending peripherally about a first axis and each defining an opening into an interior chamber of the implant, said first and second support bands each having an arcuate end surface defining a convex curvature extending along a second axis substantially orthogonal to the first axis; and   a meshed side wall defining a plurality of apertures communicating with said interior chamber, said meshed side wall extending from said first end portion to said second end portion along the first axis and integral with said first and second support bands to define a one-piece, unitary implant body.   
   
   
       20 . The implant of  claim 19 , wherein said plurality of apertures of said meshed side wall form a substantially uniform grid pattern. 
   
   
       21 . The implant of  claim 19 , wherein said plurality of apertures of said meshed side wall are triangular-shaped. 
   
   
       22 . The implant of  claim 19 , wherein said meshed side wall has an open area defined by said plurality of apertures of at least about 50% of a total exterior surface area of said meshed side wall. 
   
   
       23 . The implant of  claim 19 , wherein said first and second support bands each have a cross-sectional thickness measured orthogonal to the first axis that is greater than a cross-sectional thickness of said meshed side wall measured orthogonal to the first axis. 
   
   
       24 . The implant of  claim 19 , wherein the said first and second support bands each define a lip or abutment projecting inwardly toward said interior chamber. 
   
   
       25 . The implant of  claim 19 , wherein said first and second support bands each have an outer peripheral surface that is substantially flush with an exterior surface of said meshed side wall. 
   
   
       26 . The implant of  claim 19 , wherein said meshed side wall extends along the second axis between opposite first and second transverse end walls, said first and second transverse end walls extending along the first axis between said first and second end portions. 
   
   
       27 . The implant of  claim 26 , wherein each of said first and second transverse end walls includes opposite bearing surfaces, each of said bearing surfaces being substantially planar. 
   
   
       28 . The implant of  claim 27 , wherein each of said bearing surfaces include one or more anti-expulsion features to inhibit expulsion of said implant body from a bone cavity. 
   
   
       29 . The implant of  claim 26 , wherein each of said first and second transverse end walls includes opposite bearing surfaces, said opposite bearing surfaces defined by said first transverse end wall separated by a first distance to define a first implant height, said opposite bearing surfaces defined by said second transverse end wall separated by a second distance greater than said first distance to define a second implant height greater than said first implant height. 
   
   
       30 . The implant of  claim 19 , wherein said meshed side wall is substantially planar. 
   
   
       31 . The implant of  claim 19 , wherein said meshed side wall includes a first planar wall portion and an opposite second planar wall portion arranged substantially parallel with said first planar wall portion. 
   
   
       32 . The implant of  claim 19 , wherein said opening defined by each of said first and second support bands is rectangular. 
   
   
       33 . The implant of  claim 19 , wherein said arcuate end surfaces of said first and second support bands defines a maximum height of said implant body along the first axis that is greater than a height of a bone cavity to inhibit expulsion of said implant body from the bone cavity. 
   
   
       34 . The implant of  claim 19 , wherein said implant body has a rectangular cross-sectional shape in a plane orthogonal to the first axis. 
   
   
       35 . The implant of  claim 19 , wherein said implant body has a rectangular cross-sectional shape in a plane orthogonal to the second axis. 
   
   
       36 . An orthopedic implant, comprising:
 a first end portion including a first support band and an opposite second end portion including a second support band, said first and second support bands each extending peripherally about a first axis and each defining an opening into an interior chamber of the implant, said first and second support bands each having an arcuate end surface defining a convex curvature extending along a second axis substantially orthogonal to the first axis; and   opposite first and second meshed side walls each defining a plurality of apertures communicating with said interior chamber and each extending from said first end portion to said second end portion along the first axis and integral with said first and second support bands to define a one-piece, unitary implant body, said first and second meshed side walls being substantially planar and arranged substantially parallel with one another.   
   
   
       37 . The implant of  claim 36 , wherein said first and second meshed side walls have an open area defined by said plurality of apertures of at least about 50% of a total exterior surface area of said first and second meshed side walls. 
   
   
       38 . The implant of  claim 36 , wherein said first and second support bands each have a cross-sectional thickness measured orthogonal to the first axis that is greater than a cross-sectional thickness of said first and second meshed side walls measured orthogonal to the first axis.