Glenoid augment and associated method

• US 7,892,287 B2
• Filed: 09/27/2004
• Issued: 02/22/2011
• Est. Priority Date: 09/27/2004
• Status: Active Grant

• Current Assignee: Depuy Products Incorporated (Johnson & Johnson)
• Original Assignee: Depuy Products Incorporated (Johnson & Johnson)
• Inventors: Deffenbaugh, Daren Lloyd
• Primary Examiner(s): Stewart; Alvin J
• Application Number:
  US10/951,024
• Publication Number:
  US 20060069444A1
• Time in Patent Office: 2,339 Days
• Field of Search: 623 1911- 2013, 623/20.28, 623/20.21, 623/20.16, 623/23.65, 623/22.4, 623/22.15, 623/21.14, 623/22.42, 623/20.15, 623/21.11, 623/20.32, 623/20.33, 623/20.35, 623/14.12, 623/23.28
• US Class Current: 623/19.11
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61F 2/30734 Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• CPC Class Codes: A61F 2/4081 Glenoid components, e.g. cups
• CPC Class Codes: A61F 2002/30153 rectangular
• CPC Class Codes: A61F 2002/30156 triangular
• CPC Class Codes: A61F 2002/30354 Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis
• CPC Class Codes: A61F 2002/30367 with additional means for preventing said rotation
• CPC Class Codes: A61F 2002/30405 made by screwing complementary threads machined on the parts themselves
• CPC Class Codes: A61F 2002/30448 using adhesives
• 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 2002/30495 using a locking ring
• CPC Class Codes: A61F 2002/305 Snap connection
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30616 Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/30736 Augments or augmentation pieces, e.g. wedges or blocks for bridging a bone defect
• CPC Class Codes: A61F 2002/30822 Circumferential grooves
• 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 2002/30881 Circumferential ribs, flanges or fins
• CPC Class Codes: A61F 2002/30884 : Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity
• CPC Class Codes: A61F 2002/30897 : Stepped protrusions, i.e. having discrete diameter changes
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0033 : made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• 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 2230/0023 : triangular
• 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 2310/00161 : Carbon; Graphite
• CPC Class Codes: A61F 2310/00179 : Ceramics or ceramic-like structures
• CPC Class Codes: A61F 2310/00203 : containing alumina or aluminium oxide
• CPC Class Codes: A61F 2310/00239 : containing zirconia or zirconium oxide ZrO2

Abstract

A augmented glenoid implant assembly for use in performing shoulder arthroplasty is provided. The augmented glenoid implant assembly is used for cooperation with the glenoid fossa of a scapula. The implant assembly includes a first component for attachment to the scapula. The first component defines a support surface for cooperation with the glenoid fossa, a second surface positioned adjacent a buttress formed in the glenoid fossa and an assembly surface. The implant assembly also includes a second component removably secured to the first component. The second component includes an assembly face of the second component. The assembly surface of the second component is in close approximation to the assembly surface of the first component. The second component further includes an articulating surface opposed to the assembly surface.

Claims

1. An augmented glenoid implant assembly for cooperation with the glenoid fossa of a scapula, said implant assembly comprising:

a first component for attachment to the scapula, said first component defining an support surface for cooperation with the glenoid fossa, a buttress surface adapted to abut a buttress formed in a patient'"'"'s glenoid fossa and an assembly surface, the first component further including a securing feature sized and shaped to extend from the support surface and adapted to assist in securing the first component to a patient'"'"'s scapula; and

a second component removably secured to said first component, said second component including an assembly face thereof, a portion of the assembly face of said second component abutting the assembly surface of said first component, said second component further comprising an articulating surface opposed to the assembly surface, said assembly face including a mounting surface, and the mounting surface of said assembly face of said second component extends beyond said assembly surface of said first component and extends into an anterior portion of the scapula and being sized and shaped to cooperate with the glenoid fossa, wherein the mounting surface and the assembly portion are contiguous and the shape continues between the mounting surface and the assembly portion without a change in curvature.

2. The augmented glenoid implant assembly of claim 1, wherein at least one of said first component and said second component comprises at least one of a metal, a biologic material, a ceramic, an alumina, a zirconia, a carbon fiber material, a composite and a plastic.

3. The augmented glenoid implant assembly of claim 1, wherein at least one of said one of said first component and said second component comprises a locking feature to secure said second component to said first component.

4. The augmented glenoid implant assembly of claim 3, wherein said locking feature comprises at least one of a thread, a tab, a protrusion, a cavity, a void, a notch, a rib or a pawl.

5. The augmented glenoid implant assembly of claim 3:

wherein one of said first component and said second component comprises a pliable protrusion; and

wherein the other of said first component and said second component defines a void for cooperating with the protrusion.

6. The augmented glenoid implant assembly of claim 1, wherein said first component extends only over the posterior portion of the glenoid fossa.

7. The augmented glenoid implant assembly of claim 1, further comprising a third component, said third component defining an support surface for cooperation with the glenoid fossa and an assembly surface, said second component in juxtaposition with first component, the assembly surface of said second component in close approximation to the assembly surface of said third component.

8. The augmented glenoid implant assembly of claim 1, wherein the securing feature comprises at least one of a screw, a peg, a pin, a pin with fins, a pin with deflectable fins, a protrusion, a keel.

9. The augmented glenoid implant assembly of claim 1, wherein said buttress surface and said support surface define an included angle of from about 45 degrees to about 135 degrees.

10. The augmented glenoid implant assembly of claim 1, wherein the securing feature comprises a wall in said first component defining an opening therethrough and a fastener adapted to at least partially pass thru the hole and to engage the scapula.

11. An augmented glenoid implant assembly comprising:

a first component for attachment to the glenoid fossa, said first component defining an support surface adapted for cooperation with a patient'"'"'s glenoid fossa and an assembly surface, the first component further includes a securing feature sized and shaped to extend from the support surface and adapted to assist in securing the first component to a patient'"'"'s scapula; and

a second component removably secured to said first component, said second component including an assembly face thereof, the assembly face including an assembly portion, and the assembly portion of the assembly face of said second component abutting the assembly surface of said first component, said second component further comprising an articulating surface opposed to the assembly surface, said assembly face including a mounting surface, and the mounting surface of said assembly face of said second component extends beyond said assembly surface of said first component and is adapted to extend into an anterior portion of a patient'"'"'s scapula and being sized and shaped to cooperate with the glenoid fossa, wherein the mounting surface and the assembly portion are contiguous and the shape continues between the mounting surface and the assembly portion without a change in curvature.

12. The augmented glenoid implant assembly of claim 11, wherein at least one of said first component and said second component comprises at least one of a metal, a biologic material, a ceramic, an alumina, a zirconia, a carbon fiber material, a composite and a plastic.

13. The augmented glenoid implant assembly of claim 11, wherein at least one of said one of said first component and said second component comprises a locking feature to secure said second component to said first component.

14. The augmented glenoid implant assembly of claim 13, wherein said locking feature comprises at least one of a thread, a tab, a protrusion, a cavity, a notch, a rib or a pawl.

15. The augmented glenoid implant assembly of claim 13:

wherein one of said first component and said second component comprises a pliable protrusion; and

wherein the other of said first component and said second component defines a cavity for cooperating with the protrusion.

16. The augmented glenoid implant assembly of claim 11, wherein said first component extends only over the posterior portion of the glenoid fossa.

17. The augmented glenoid implant assembly of claim 11, further comprising a third component, said third component defining an support surface for cooperation with the glenoid fossa and an assembly surface, said second component in juxtaposition with first component, the assembly surface of said second component in close approximation to the assembly surface of said third component.

18. The augmented glenoid implant assembly of claim 11, wherein the securing feature comprises at least one of a screw, a peg, a pin, a pin with fins, a pin with deflectable fins, a protrusion, a keel.

19. The augmented glenoid implant assembly of claim 11, wherein said first component further comprises a buttress surface for cooperation with the scapula, the buttress surface being positioned between the support surface and the assembly surface.

20. The augmented glenoid implant assembly of claim 11, wherein the support surface and the buttress surface define an included angle of from about 45 degrees to about 135 degrees.

21. The augmented glenoid implant assembly of claim 11, wherein the securing feature comprises a wall in said first component defining an opening therethrough and a fastener adapted to at least partially pass thru the hole and to engage the scapula.