Osteoconductive devices and methods of use

Abstract

Osteoconductive devices and methods of use are provided herein. An example device includes a hollow body member having surfaces, the hollow body member having a shape that substantially conforms to a cross-sectional area of an opening of an orthopedic prosthesis, and apertures formed in the surfaces of the hollow body member that provide a osteoconductive path through the hollow body member.

That which is claimed is: 
     
         1 . An osteoconductive device, comprising:
 a hollow body member comprising surfaces, the hollow body member having a shape that substantially conforms to a cross-sectional area of an opening of an orthopedic prosthesis; and   apertures formed in the surfaces of the hollow body member that provide a osteoconductive path through the hollow body member.   
     
     
         2 . The osteoconductive device according to  claim 1 , wherein when the osteoconductive device is inserted into the opening of the orthopedic prosthesis, one of the surfaces of the hollow body member is substantially coplanar with a first surface of the orthopedic prosthesis and another surface of the hollow body member is substantially coplanar with a second surface of the orthopedic prosthesis, further wherein the first surface of the orthopedic prosthesis and the second surface of the orthopedic prosthesis are each outer surfaces of the orthopedic prosthesis. 
     
     
         3 . The osteoconductive device according to  claim 2 , wherein the apertures are aligned to form rows. 
     
     
         4 . The osteoconductive device according to  claim 3 , wherein at least a portion of the first surface or the second surface is provided with any of surface roughening, additional porosity, or combinations thereof. 
     
     
         5 . The osteoconductive device according to  claim 4 , wherein the additional porosity comprises trenches formed across a portion of the rows to create a trench matrix defining surface objects. 
     
     
         6 . The osteoconductive device according to  claim 1 , wherein a surface of the surfaces comprises protrusions that extend normally to surface, the protrusions being configured to engage with an inner sidewall of the opening of the orthopedic prosthesis, when the osteoconductive device is inserted into the bone fusion channel of the orthopedic prosthesis. 
     
     
         7 . The osteoconductive device according to  claim 1 , wherein a first surface of the surfaces is terminated to create a first shelf, and wherein a second surface of the surfaces is terminated to create a second shelf. 
     
     
         8 . The osteoconductive device according to  claim 1 , wherein the surfaces comprise a first surface, a second surface, and a sidewall that spaces the first surface and the second surface away from one another, further wherein the sidewall engages with an inner surface of the opening of the orthopedic prosthesis. 
     
     
         9 . The osteoconductive device according to  claim 1 , wherein the surfaces comprise a first surface and a sidewall that extends normally from an outer peripheral edge of the first surface, further wherein the sidewall engages with an inner surface of the orthopedic prosthesis. 
     
     
         10 . The osteoconductive device according to  claim 1 , wherein the hollow body member comprises two portions,
 wherein a first of the two portions comprises:
 a first surface of the surfaces; and 
 a first sidewall that extends normally from an outer peripheral edge of the first surface; 
   wherein a second of the two portions comprises:
 a second surface of the surfaces; and 
 a second sidewall that extends normally from an outer peripheral edge of the second surface; and 
   wherein the two portions are inserted into the opening of the orthopedic prosthesis in such a way that the first sidewall mates with or is in close proximity to the second sidewall.   
     
     
         11 . The osteoconductive device according to  claim 10 , wherein the first surface of the hollow body member is substantially coplanar with a first surface of the orthopedic prosthesis and the second of the hollow body member is substantially coplanar with a second surface of the orthopedic prosthesis. 
     
     
         12 . A system, comprising:
 a spinal fusion cage comprising a bone fusion channel; and   an osteoconductive device configured for insertion into the bone fusion channel of the spinal fusion cage, the osteoconductive device comprising:
 a hollow body member comprising surfaces, the hollow body member having a shape that substantially conforms to an inner cross-sectional area of the bone fusion channel; and 
 apertures formed in the surfaces of the hollow body member that provide an osteoconductive path through the hollow body member. 
   
     
     
         13 . The osteoconductive device according to  claim 12 , wherein when the osteoconductive device is inserted into the bone fusion channel one of the surfaces of the hollow body member is substantially coplanar with a first surface of the spinal fusion cage and another surface of the hollow body member is substantially coplanar with a second surface of the spinal fusion cage. 
     
     
         14 . The osteoconductive device according to  claim 13 , wherein the apertures are aligned to form rows, further wherein at least a portion of the first surface or the second surface is provided with any of surface roughening, additional porosity, or combinations thereof. 
     
     
         15 . The osteoconductive device according to  claim 14 , wherein the additional porosity comprises trenches formed across a portion of the rows. 
     
     
         16 . The osteoconductive device according to  claim 15 , wherein a surface of the surfaces comprises protrusions that extend normally to surface, the protrusions being configured to engage with an inner sidewall of the bone fusion channel when the osteoconductive device is inserted into the bone fusion channel. 
     
     
         17 . The osteoconductive device according to  claim 12 , wherein a first surface of the surfaces is terminated to create a first shelf. 
     
     
         18 . The osteoconductive device according to  claim 17 , wherein a second surface of the surfaces is terminated to create a second shelf. 
     
     
         19 . The osteoconductive device according to  claim 12 , wherein the surfaces comprise a first surface, a second surface, and a sidewall that spaces the first surface and the second surface away from one another, further wherein the sidewall engages with an inner surface of the bone fusion channel, and further wherein the surfaces comprise a first surface and a sidewall that extends normally from an outer peripheral edge of the first surface, further wherein the sidewall engages with an inner surface of the bone fusion channel. 
     
     
         20 . The osteoconductive device according to  claim 12 , wherein the hollow body member comprises two portions,
 wherein a first of the two portions comprises:
 a first surface of the surfaces; and 
 a first sidewall that extends normally from an outer peripheral edge of the first surface; 
   wherein a second of the two portions comprises:
 a second surface of the surfaces; and 
 a second sidewall that extends normally from an outer peripheral edge of the second surface; and 
   wherein the two portions are inserted into the bone fusion channel in such a way that the first sidewall mates with or is in close proximity to the second sidewall.