ORTHOPAEDIC IMPLANT WITH POROUS STRUCTURAL MEMBER

• US 20100042218A1
• 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:
  US12/540,515
• Publication Number:
  US 20100042218A1
• Time in Patent Office: Days
• US Class Current: 623/17.120
• CPC Class Codes: A61F 2/3094 Designing or manufacturing processes
• CPC Class Codes: A61F 2/30965 Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping
• CPC Class Codes: A61F 2/4465 having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine
• CPC Class Codes: A61F 2002/3008 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61F 2002/30387 Dovetail connection
• CPC Class Codes: A61F 2002/30451 soldered or brazed or welded
• CPC Class Codes: A61F 2002/30492 using a locking pin
• CPC Class Codes: A61F 2002/305 Snap connection
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30599 stackable
• CPC Class Codes: A61F 2002/30677 Means for introducing or releasing pharmaceutical products, e.g. antibiotics, into the body
• CPC Class Codes: A61F 2002/30733 Inserts placed into an endoprosthetic cavity, e.g. for modifying a material property
• CPC Class Codes: A61F 2002/30841 Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• CPC Class Codes: A61F 2002/3097 using laser
• CPC Class Codes: A61F 2002/30971 Laminates, i.e. layered products
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2250/0063 Nested prosthetic parts
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61F 2310/00017 Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00203 : containing alumina or aluminium oxide
• CPC Class Codes: A61F 2310/00293 : containing a phosphorus-containing compound, e.g. apatite

Abstract

An orthopaedic implant includes a first member comprised of a substantially non-porous material, and a second member coupled with the first member. The second member has a first side and an opposing second side, with each of the first side and the second side being external load bearing surfaces. The second member is formed from a substantially porous material with interconnecting pores extending from the first side to the second side.

Claims

1. An orthopaedic implant, comprising:

a first member comprised of a substantially non-porous material; and

a second member coupled with said first member, said second member having a first side and an opposing second side, each of said first side and said second side being external load bearing surfaces, said second member comprised of a substantially porous material with interconnecting pores extending from said first side to said second side.

2. The orthopaedic implant of claim 1, wherein said first member surrounds said second member, said first member having a first side which is generally coplanar with said first side of said second member, and a second side which is generally coplanar with said second side of said second member.

3. The orthopaedic implant of claim 2, wherein said first member is one of generally annular shaped, kidney shaped, D-shaped, circular shaped, oval shaped, and rectangular shaped.

4. The orthopaedic implant of claim 1, wherein said first member is a multi-part member, with the parts being coupled together.

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

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

7. The orthopaedic implant of claim 6, wherein said orthopaedic implant has a longitudinal axis, and said plurality of layers are oriented at a predetermined orientation relative to said longitudinal axis, including a selected one of a perpendicular orientation, a parallel orientation and an acute angular orientation.

8. The orthopaedic implant of claim 7, wherein said predetermined orientation is one of constant and varies from one part of said implant to another.

9. The orthopaedic implant of claim 1, wherein said first member has an interface feature and said second member has a mating interface feature.

10. The orthopaedic implant of claim 9, wherein said interface feature is one of a window, a ledge and a groove.

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

12. The orthopaedic implant of claim 11, wherein said second member includes a reservoir for the therapeutic agent.

13. The orthopaedic implant of claim 12, wherein said reservoir has a refill port.

14. The orthopaedic implant of claim 1, wherein said implant has a tapered external profile.

15. The orthopaedic implant of claim 1, wherein said second member has a reinforced attachment region for interfacing with a surgical instrument.

16. The orthopaedic implant of claim 1, wherein said implant includes at least one radiopaque marker.

17. An orthopaedic implant, comprising a first member and a second member coupled together, said second member having a first side and an opposing second side, each of said first side and said second side being external load bearing surfaces, said second member comprised of a substantially porous material with interconnecting pores extending from said first side to said second side.

18. The orthopaedic implant of claim 17, wherein said first member surrounds said second member, said first member having a first side which is generally coplanar with said first side of said second member, and a second side which is generally coplanar with said second side of said second member.

19. The orthopaedic implant of claim 17, wherein said second member is comprised of one of a metal, ceramic and a polymer.

20. The orthopaedic implant of claim 17, wherein said second member is comprised of a plurality of stacked layers which are bonded together.

21. The orthopaedic implant of claim 17, wherein said first member has an interface feature and said second member has a mating interface feature.

22. The orthopaedic implant of claim 17, wherein said second member carries a therapeutic agent.

23. An orthopaedic implant, comprising a first side and an opposing second side, each of said first side and said second side being external load bearing surfaces, said implant comprised of a substantially porous material with interconnecting pores extending from said first side to said second side.

24. The orthopaedic implant of claim 23, wherein said substantially porous material is comprised of one of a metal, ceramic and a polymer.

25. The orthopaedic implant of claim 23, wherein said porous material is comprised of a plurality of stacked layers which are bonded together.

26. The orthopaedic implant of claim 23, wherein said porous material carries a therapeutic agent.