Method and apparatus for use of porous implants

• US 8,292,967 B2
• Filed: 12/05/2005
• Issued: 10/23/2012
• Est. Priority Date: 04/21/2005
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Brown, David R, May, Brian, Woodell-May, Jennifer, Hoeppner, Jacy C, Schlueter, Elizabeth, Kumar, Mukesh, White, John R, Parrott, Russell
• Primary Examiner(s): Robert, Eduardo C
• Assistant Examiner(s): SCHILLINGER, ANN M
• Application Number:
  US11/294,692
• Publication Number:
  US 20060241776A1
• Time in Patent Office: 2,514 Days
• Field of Search: 623 2211- 2346
• US Class Current: 623/23.19
• CPC Class Codes: A61B 17/0401 Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors A61B17/0642 takes precedence; fixation devices for tendons or ligaments A61F2/0811
• CPC Class Codes: A61B 17/7225 for bone compression
• CPC Class Codes: A61B 17/866 Material or manufacture
• CPC Class Codes: A61B 2017/00831 Material properties
• CPC Class Codes: A61B 2017/0459 Multiple holes in the anchor through which the suture extends and locking the suture when tension is applied
• CPC Class Codes: A61F 2/0811 Fixation devices for tendons or ligaments
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• CPC Class Codes: A61F 2/30907 Nets or sleeves applied to surface of prostheses or in cement
• CPC Class Codes: A61F 2/36 Femoral heads ; Femoral endoprostheses
• 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 2/40 for shoulders
• CPC Class Codes: A61F 2002/2817 Bone stimulation by chemical reactions or by osteogenic or biological products for enhancing ossification, e.g. by bone morphogenetic or morphogenic proteins [BMP] or by transforming growth factors [TGF]
• CPC Class Codes: A61F 2002/30011 differing in porosity
• CPC Class Codes: A61F 2002/30153 rectangular
• CPC Class Codes: A61F 2002/30187 D-shaped or half-disc-shaped
• CPC Class Codes: A61F 2002/30217 hollow cones, e.g. tubular-like cones
• CPC Class Codes: A61F 2002/30276 frustopyramidal
• CPC Class Codes: A61F 2002/30329 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2002/30387 Dovetail connection
• CPC Class Codes: A61F 2002/30433 : using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2002/30449 : the adhesive being cement
• CPC Class Codes: A61F 2002/30451 : soldered or brazed or welded
• CPC Class Codes: A61F 2002/30594 : slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots
• CPC Class Codes: A61F 2002/30616 : Sets comprising a plurality of prosthetic parts of different sizes or orientations
• 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 2002/30736 : Augments or augmentation pieces, e.g. wedges or blocks for bridging a bone defect
• CPC Class Codes: A61F 2002/30738 : Sleeves
• CPC Class Codes: A61F 2002/30785 : parallel
• CPC Class Codes: A61F 2002/30787 : inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/30823 : having the shape of a reverse dovetail
• CPC Class Codes: A61F 2002/30878 : with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
• CPC Class Codes: A61F 2002/30909 : Nets
• CPC Class Codes: A61F 2002/30915 : made of a stack of bonded perforated sheets, grids or wire meshes
• CPC Class Codes: A61F 2002/30919 : Sleeves
• CPC Class Codes: A61F 2002/30952 : using CAD-CAM techniques or NC-techniques
• CPC Class Codes: A61F 2002/30967 : Diffusion bonding
• CPC Class Codes: A61F 2002/30968 : Sintering
• CPC Class Codes: A61F 2002/3097 : using laser
• CPC Class Codes: A61F 2002/3401 : with radial apertures, e.g. radial bores for receiving fixation screws
• CPC Class Codes: A61F 2002/3611 : Heads or epiphyseal parts of femur
• CPC Class Codes: A61F 2002/3625 : Necks
• CPC Class Codes: A61F 2002/407 : Intermediate parts of shafts
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0041 : using additional screws, bolts, dowels or rivets, e.g. connecting screws
• CPC Class Codes: A61F 2220/005 : using adhesives
• CPC Class Codes: A61F 2220/0058 : soldered or brazed or welded
• CPC Class Codes: A61F 2230/0019 : rectangular
• CPC Class Codes: A61F 2230/0034 : D-shaped
• CPC Class Codes: A61F 2230/0067 : conical
• CPC Class Codes: A61F 2230/0086 : Pyramidal, tetrahedral, or wedge-shaped
• CPC Class Codes: A61F 2250/0024 : made from both porous and non-porous parts, e.g. adjacent parts
• 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 2310/00796 : Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite
• CPC Class Codes: B33Y 80/00 : Products made by additive manufacturing

Abstract

A prosthesis includes an implant defining an attachment surface thereon. A porous insert is selectively coupled to the implant. The porous insert is adapted to be received at the attachment surface of the implant in a retained position. The porous insert is adapted to facilitate tissue ingrowth. In one embodiment the implant comprises a femoral component. The femoral component comprises an inner condylar portion having a first and second lateral sidewalls, an anterior wall and a posterior wall defining a box. The box defines the attachment surface. In other embodiments, the implant comprises a hip stem and an acetabular shell.

Claims

1. A prosthesis comprising:

a stem defining an attachment surface; and

an insert collectively comprising a porous metal portion attached to a solid framework portion and having a fastener passage formed therethrough, said insert removably coupled to said stem, said insert adapted to be intraoperatively received at said attachment surface of said stem in a retained position, said solid framework portion including a series of frame portions arranged in a cross-hatched pattern that occupies a space on an outer surface of said insert and within an interior space of said insert, said solid framework portion operable to facilitate structural weight bearing properties of said porous insert; and

a fastener that passes through said fastener passage and threadably mates with said insert to couple said insert to said attachment surface of said stem;

wherein said insert is adapted to facilitate tissue ingrowth.

2. The prosthesis of claim 1 wherein said stem includes a femoral hip stem.

3. The prosthesis of claim 2 wherein said insert includes biocompatible metal.

4. The prosthesis of claim 2 wherein said insert is load bearing.

5. The prosthesis of claim 4, further comprising a plurality of inserts having distinct geometries, said plurality of inserts each adapted to be coupled to said attachment surface of said stem.

6. The prosthesis of claim 2 wherein said attachment surface is provided collectively on parallel surfaces of a proximal lateral surface of a calcar portion of said hip stem.

7. The prosthesis of claim 6 wherein said insert has a generally U-shaped body that wraps around said calcar portion of said hip stem and engages said parallel surfaces of said attachment surface.

8. The prosthesis of claim 7 wherein said attachment surface is nested in said calcar portion relative to an outer surface of said hip stem.

9. The prosthesis of claim 1 wherein said framework is coated with hydroxyapatite.

10. The prosthesis of claim 1 wherein said insert further includes at least one of an anti-infective agent, osteoconductive agent, autologous blood product, hydrogels, autologous cells, allogenic cells, peptides, bone morphogenetic proteins (BMP), bulk allograft and demineralized bone matrix (DBM).

11. The prosthesis of claim 1 wherein said solid framework portion is formed of metal.

12. The prosthesis of claim 11 wherein said solid framework portion is formed of a metal selected from the group comprising stainless steel, titanium, titanium alloys and cobalt-chromium alloys.

13. A prosthesis comprising:

a femoral hip stem having a calcar portion that has a recessed attachment surface that is formed around said calcar portion such that at least two surfaces of said recessed attachment surface occupy distinct planes and are substantially parallel, said hip stem including a threaded bore;

an insert comprising a porous metal portion and a distinct solid metal framework portion, said solid metal framework portion including a series of frame portions arranged in a cross-hatched pattern, said solid metal framework portion facilitating structural weight bearing properties of said insert, said insert having a generally U-shaped body that substantially wraps around said calcar portion and nests onto said recessed attachment surface in an installed position, said insert defining a throughbore; and

a fastener that extends through said throughbore and threadably mates with said threaded bore of said femoral hip stem in said installed position to intraoperatively couple said insert to said hip stem.

14. The prosthesis of claim 13 wherein said solid metal framework portion is formed exclusively on an outboard surface of said insert.

15. The prosthesis of claim 13 wherein said solid metal framework portion is formed of a metal selected from the group comprising stainless steel, titanium, titanium alloys and cobalt-chromium alloys.

16. The prosthesis of claim 13 wherein said solid metal framework portion is formed on an exterior surface of said insert and occupies an interior space of said insert.