US2013178947A1PendingUtilityA1

Porous metal implants with bone cement

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Individually held — no corporate assignee on recordPriority: Jan 9, 2012Filed: Jan 8, 2013Published: Jul 11, 2013
Est. expiryJan 9, 2032(~5.5 yrs left)· nominal 20-yr term from priority
Inventors:Matthew E. MonaghanTimothy A. Hoeman
A61L 2430/02A61F 2002/2832A61F 2/34A61F 2/2846A61L 27/56A61F 2002/2892A61F 2/28A61L 27/446A61L 27/427A61L 27/04A61L 27/34A61F 2002/2835A61F 2002/2825A61F 2/30767
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Claims

Abstract

An orthopaedic implant for filling a bone void and a method of using the same. The orthopaedic implant comprises an open porous metal portion and a bone cement portion. At a first surface region, the open porous metal portion facilitates bone and/or soft tissue ingrowth into the pores of the first surface region of the open porous metal. At a second surface region, the open porous metal facilitates reception of the bone cement into the pores of the second surface region of the open porous metal. The open porous metal portion of the orthopaedic implant may also be formed of a plurality of porous metal fragments aggregated together with the cement portion of the orthopaedic implant. Additionally, the orthopaedic implant may be pliable and thereby capable of being molded to the shape of a void in a bone.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . An orthopaedic implant for filling a bone void, comprising:
 an open porous metal portion having a first porous layer and a second porous layer; and   a curable fixative at least partially disposed over an area of said first porous layer, said curable fixative also at least partially disposed within said first porous layer.   
     
     
         2 . The orthopaedic implant of  claim 1 , wherein said first porous layer comprises a plurality of first pores having a first nominal pore diameter for contacting tissue, and said second porous layer comprises a plurality of second pores having a second nominal pore diameter. 
     
     
         3 . The orthopaedic implant of  claim 2 , wherein said first porous layer comprises a thickness of between one and ten first pore diameters and said second porous layer comprises a thickness of between one and ten second pore diameters. 
     
     
         4 . The orthopaedic implant of  claim 2 , wherein said second nominal pore diameter is greater than said first nominal pore diameter. 
     
     
         5 . The orthopaedic implant of  claim 1 , wherein said open porous metal portion comprises a flexible sheet having a thickness of no more than twelve pore diameters. 
     
     
         6 . An orthopaedic implant for filling a bone void, comprising:
 a plurality of open porous metal fragments arranged in a layer having first and second sides;   a curable fixative at least partially disposed over an area of said first side of said layer, said curable fixative also at least partially disposed within said open porous fragments; and   a backing member contacting said second side of said layer.   
     
     
         7 . The orthopaedic implant of  claim 6 , wherein pores of said metal fragments on said second side of said layer have a first nominal pore diameter for contacting tissue, and said pores of said metal fragments on said first side of said layer have a second nominal pore diameter. 
     
     
         8 . The orthopaedic implant of  claim 7 , wherein said second nominal pore diameter is greater than said first nominal pore diameter. 
     
     
         9 . The orthopaedic implant of  claim 6 , wherein said backing member includes an adhesive surface contacting said second side of said layer. 
     
     
         10 . An orthopaedic implant for filling a bone void, comprising:
 a first plurality of open porous metal fragments arranged in a first layer having first and second sides;   a second plurality of open porous metal fragments arranged in a second layer having first and second sides; and   a curable fixative disposed between said first side of said first layer and said first side of said second player, said curable fixative also at least partially disposed within said first and second plurality of open porous metal fragments.   
     
     
         11 . The orthopaedic implant of  claim 10 , wherein pores on said first side of said first layer and said second layer comprise a first nominal pore diameter for contacting tissue, and pores on said second side of said first layer and second layer comprise a second nominal pore diameter. 
     
     
         12 . The orthopaedic implant of  claim 11 , wherein said second nominal pore diameter is greater than said first nominal pore diameter. 
     
     
         13 . The orthopaedic implant of  claim 10 , wherein pores on said second side of said first layer comprise a first nominal pore diameter and pores on said second side of said second layer comprise a second nominal pore diameter, wherein said second nominal pore diameter is greater than said first nominal pore diameter. 
     
     
         14 . The orthopaedic implant of  claim 10  further comprising a backing member contacting said second side of said first layer. 
     
     
         15 . The orthopaedic implant of  claim 14  further comprising a second backing member contacting said second side of said second layer. 
     
     
         16 . The orthopaedic implant of  claim 15 , wherein said backing member includes an adhesive surface contacting said second side of said first layer and said second backing member includes an adhesive surface contacting said second side of said second layer. 
     
     
         17 . The orthopaedic implant of  claim 10 , wherein said first layer comprises a thickness of no more than twelve pore diameters and said second layer comprises a thickness of no more than twelve pore diameters. 
     
     
         18 . The orthopaedic implant of  claim 17 , wherein said thickness of said first layer is greater than said thickness of said second layer. 
     
     
         19 . The orthopaedic implant of  claim 10 , wherein said first plurality of open porous metal fragments comprise a substantially uniform size and a substantially uniform shape. 
     
     
         20 . The orthopaedic implant of  claim 19 , wherein said second plurality of open porous metal fragments also comprise a substantially uniform size and a substantially uniform shape, said size and shape of said first plurality of open porous metal fragments being substantially the same as said size and shape of said second plurality of open porous metal fragments.

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