ORTHOPAEDIC IMPLANT WITH SPATIALLY VARYING POROSITY

• US 20100042226A1
• Filed: 08/13/2009
• Published: 02/18/2010
• Est. Priority Date: 08/13/2008
• Status: Abandoned Application

• Current Assignee: SMed TA/TD, LLC. (Sites Medical LLC)
• Original Assignee: SMed TA/TD, LLC. (Sites Medical LLC)
• Inventors: Stalcup, Gregory C., Nebosky, Paul S., Zimmerman, Sarah L.
• Application Number:
  US12/540,745
• Publication Number:
  US 20100042226A1
• Time in Patent Office: Days
• US Class Current: 623/23.300
• CPC Class Codes: A61F 2/30 Joints
• CPC Class Codes: A61F 2/36 Femoral heads ; Femoral endoprostheses
• CPC Class Codes: A61F 2/38 for elbows or knees
• CPC Class Codes: A61F 2/4081 Glenoid components, e.g. cups
• CPC Class Codes: A61F 2002/30011 differing in porosity
• CPC Class Codes: A61F 2002/30677 Means for introducing or releasing pharmaceutical products, e.g. antibiotics, into the body
• CPC Class Codes: A61F 2002/3092 having an open-celled or open-pored structure
• CPC Class Codes: A61F 2002/3093 for promoting ingrowth of bone tissue
• CPC Class Codes: A61F 2002/30932 for retarding or preventing ingrowth of bone tissue
• CPC Class Codes: A61F 2250/0023 differing in porosity
• CPC Class Codes: A61F 2310/00796 Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite

Abstract

An orthopaedic implant includes a body member having a first region with a first porosity and a second region with a second porosity. At least one physical characteristic of the first porosity is different than at least one physical characteristic of the second porosity.

Claims

1. An orthopaedic implant, comprising:

a body member including a first region with a first porosity and a second region with a second porosity, at least one physical characteristic of said first porosity being different than at least one physical characteristic of said second porosity.

2. The orthopaedic implant of claim 1, wherein each said at least one physical characteristic includes one of:

pore size;

pore shape;

pore density (% porosity);

pore interconnection size/shape;

surface roughness;

surface treatment;

surface coating;

material type;

ability to deliver therapeutic agents and in what amount;

laminate thickness;

taper of layer(s);

thickness of layer(s); and

structural type of porous material.

3. The orthopaedic implant of claim 2, wherein said structural type of porous material includes one of a sintered metal, powdered metal, and laminate metal.

4. The orthopaedic implant of claim 1, wherein each said at least one physical characteristic includes one of:

a macroscopic physical property, a microscopic physical property, a microscale physical property, and a nanoscale physical property.

5. The orthopaedic implant of claim 1, wherein said first porosity and said second porosity each include at least one of a mesh, fibers, particles, beads, and a lattice.

6. The orthopaedic implant of claim 5, wherein said lattice includes a plurality of layers.

7. The orthopaedic implant of claim 6, wherein said lattice is one of a metal lattice and a ceramic lattice.

8. The orthopaedic implant of claim 1, wherein said second member is comprised of one of a metal, ceramic and a polymer.

9. The orthopaedic implant of claim 1, wherein said second member is comprised of a plurality of stacked layers which are bonded together.

10. The orthopaedic implant of claim 1, wherein said second member carries a therapeutic agent.

12. The orthopaedic implant of claim 1, wherein each said at least one physical characteristic includes one of:

pore size;

pore shape;

pore density (% porosity);

pore interconnection size/shape;

surface roughness;

surface treatment;

surface coating;

material type;

ability to deliver therapeutic agents and in what amount;

laminate thickness;

taper of layer(s);

thickness of layer(s); and

structural type of porous material.

13. The orthopaedic implant of claim 12, wherein said structural type of porous material includes one of a sintered metal, powdered metal, and laminate metal.

11. An orthopaedic implant, comprising a body member including a first porosity and a spatially discrete second porosity, at least one physical characteristic of said first porosity being different than at least one physical characteristic of said second porosity.

14. The orthopaedic implant of claim 11, wherein each said at least one physical characteristic includes one of:

a macroscopic physical property, a microscopic physical property, a microscale physical property, and a nanoscale physical property.

15. The orthopaedic implant of claim 11, wherein said first porosity and said second porosity each include at least one of a mesh, fibers, particles, beads, and a lattice.

16. The orthopaedic implant of claim 15, wherein said lattice includes a plurality of layers.

17. The orthopaedic implant of claim 16, wherein said lattice is one of a metal lattice and a ceramic lattice.

18. The orthopaedic implant of claim 11, wherein said first porosity and said second porosity are comprised of one of a metal, ceramic and a polymer.

19. The orthopaedic implant of claim 11, wherein said first porosity and said second porosity are comprised of a plurality of stacked layers which are bonded together.

20. The orthopaedic implant of claim 11, wherein at least one of said first porosity and said second porosity carry a therapeutic agent.