Implant with composite coating

• US 8,167,954 B2
• Filed: 11/04/2008
• Issued: 05/01/2012
• Est. Priority Date: 05/14/1998
• Status: Expired due to Term

• Current Assignee: Shalby Advanced Technologies, Inc. (Shalby Ltd.)
• Original Assignee: Consensus Orthopedics, Inc.
• Inventors: Despres, Alfred S. III, Elwood, Eugene J., Aharonov, Robert R., Ehlers, Peter, Andersen, Knut
• Primary Examiner(s): Gherbi, Suzette J
• Application Number:
  US12/290,876
• Publication Number:
  US 20090254191A1
• Time in Patent Office: 1,274 Days
• Field of Search: 623 2336- 2353
• US Class Current: 623/23.53
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• 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 2/36 Femoral heads ; Femoral endoprostheses
• CPC Class Codes: A61F 2/3662 Femoral shafts
• CPC Class Codes: A61F 2/367 Proximal or metaphyseal parts of shafts trochanteric devices connected to said proximal parts A61F2/30739
• CPC Class Codes: A61F 2/3859 Femoral components
• CPC Class Codes: A61F 2002/30016 differing in hardness, e.g. Vickers, Shore, Brinell
• CPC Class Codes: A61F 2002/30906 shot- sand- or grit-blasted
• CPC Class Codes: A61F 2002/30925 etched
• CPC Class Codes: A61F 2002/30929 having at least two superposed coatings
• CPC Class Codes: A61F 2002/30968 Sintering
• CPC Class Codes: A61F 2002/3097 using laser
• CPC Class Codes: A61F 2002/3611 Heads or epiphyseal parts of femur
• CPC Class Codes: A61F 2002/3625 Necks
• CPC Class Codes: A61F 2002/3631 with an integral complete or partial peripheral collar or bearing shoulder at its base
• CPC Class Codes: A61F 2002/365 Connections of heads to necks
• CPC Class Codes: A61F 2250/0019 differing in hardness, e.g. Vickers, Shore, Brinell
• 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 2310/00029 : Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
• CPC Class Codes: A61F 2310/00131 : Tantalum or Ta-based alloys
• CPC Class Codes: A61F 2310/00179 : Ceramics or ceramic-like structures
• CPC Class Codes: A61F 2310/00407 : Coating made of titanium or of Ti-based alloys
• CPC Class Codes: A61F 2310/00485 : Coating made of zirconium or Zr-based alloys
• CPC Class Codes: A61F 2310/00491 : Coating made of niobium or Nb-based alloys
• CPC Class Codes: A61F 2310/00538 : Coating made of hafnium or Hf-based alloys
• CPC Class Codes: A61F 2310/00544 : Coating made of tantalum or Ta-based alloys
• CPC Class Codes: A61F 2310/00574 : Coating or prosthesis-covering structure made of carbon, e.g. of pyrocarbon
• CPC Class Codes: A61F 2310/0058 : Coating made of diamond or of diamond-like carbon DLC
• CPC Class Codes: A61F 2310/00796 : Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite
• CPC Class Codes: A61F 2310/00976 : Coating or prosthesis-covering structure made of proteins or of polypeptides, e.g. of bone morphogenic proteins BMP or of transforming growth factors TGF
• CPC Class Codes: A61L 27/306 : Other specific inorganic materials not covered by A61L27/303 - A61L27/32
• CPC Class Codes: A61P 19/00 : Drugs for skeletal disorders

Abstract

Systems and methods are described for implants with composite coatings to promote tissue in-growth and/or on-growth. An implant includes: a substrate; a structured surface formed on at least a portion of the substrate; and a biocompatible coating deposited on at least a fraction of the structured surface. The systems and methods provide advantages in that the implant has good biocompatibility while the biocompatible coating has good strength.

Claims

1. An orthopedic implant for in vivo disposition adjacent a bone, the implant comprising:

a substrate having a bearing surface adapted for sliding engagement with the bone;

a structured surface formed on a portion of said substrate and adapted for engagement with tissue;

a biocompatible coating disposed on said structured surface, the coating being more biocompatible than said structured surface and said substrate; and

said coating being softer than said structural surface.

2. An orthopedic implant for disposition adjacent a bone, the implant comprising:

a substrate having a bearing surface adapted for sliding engagement with a bone;

a structured surface formed on a portion of said substrate and adapted for engagement with tissue;

a biocompatible coating deposited on at least a fraction of said structured surface, the coating being more biocompatible than said structured surface and said substrate;

wherein said portion of said biocompatible coating on said substrate is adapted to accommodate tissue in-growth and/or on-growth for stability.