Augmented glenoid component having an interrupted surface and associated method for securing the augmented glenoid component to a glenoid surface of a scapula

• US 6,699,289 B2
• Filed: 12/31/2001
• Issued: 03/02/2004
• Est. Priority Date: 12/31/2001
• Status: Expired due to Term

• Current Assignee: Depuy Synthes Products Incorporated (Johnson & Johnson)
• Original Assignee: DePuy Orthopaedics Incorporated (Johnson & Johnson)
• Inventors: Iannotti, Joseph P., Williams, Gerald R. Jr.
• Primary Examiner(s): Shaver, Kevin
• Assistant Examiner(s): STOKES, CANDICE CAPRI
• Application Number:
  US10/036,583
• Publication Number:
  US 20030125809A1
• Time in Patent Office: 792 Days
• Field of Search: 623/19.13, 623/19.11
• US Class Current: 623/19.13
• CPC Class Codes: A61B 17/1684 for the shoulder
• CPC Class Codes: A61B 17/84 Fasteners therefor or fasteners being internal fixation devices
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61F 2/28 Bones joints A61F2/30
• CPC Class Codes: A61F 2/30965 Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping
• CPC Class Codes: A61F 2/34 Acetabular cups
• CPC Class Codes: A61F 2/36 Femoral heads ; Femoral endoprostheses
• CPC Class Codes: A61F 2/40 for shoulders
• CPC Class Codes: A61F 2/4059 Humeral shafts
• CPC Class Codes: A61F 2/4081 Glenoid components, e.g. cups
• CPC Class Codes: A61F 2/4202 for ankles
• CPC Class Codes: A61F 2/4261 for wrists
• CPC Class Codes: A61F 2002/30153 rectangular
• CPC Class Codes: A61F 2002/30276 frustopyramidal
• CPC Class Codes: A61F 2002/30324 differing in thickness
• CPC Class Codes: A61F 2002/30326 differing in height or in length
• CPC Class Codes: A61F 2002/30327 differing in diameter
• CPC Class Codes: A61F 2002/30383 made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30736 Augments or augmentation pieces, e.g. wedges or blocks for bridging a bone defect
• CPC Class Codes: A61F 2002/30787 : inclined obliquely with respect to each other
• 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 2002/30891 : Plurality of protrusions
• CPC Class Codes: A61F 2002/30892 : parallel
• CPC Class Codes: A61F 2002/30957 : using a positive or a negative model, e.g. moulds
• CPC Class Codes: A61F 2002/4018 : Heads or epiphyseal parts of humerus
• CPC Class Codes: A61F 2002/4631 : the prosthesis being specially adapted for being cemented
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2230/0019 : rectangular
• CPC Class Codes: A61F 2230/0086 : Pyramidal, tetrahedral, or wedge-shaped
• CPC Class Codes: A61F 2250/0036 : differing in thickness
• CPC Class Codes: A61F 2250/0037 : differing in height or in length
• CPC Class Codes: A61F 2250/0039 : differing in diameter
• 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 2310/00179 : 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
• CPC Class Codes: A61F 2310/00359 : Bone or bony tissue

Abstract

A glenoid component for securement to a glenoid surface of a scapula so as to provide a bearing surface for a head portion of a humerus includes a body having a first surface configured to contact the glenoid surface of the scapula and a second surface configured to receive the head portion of the humerus. The glenoid component also includes an interruption such as a buttress extending from the body. The interruption is configured to be received in a like-configured notch formed in the glenoid surface of the scapula. The interruption helps prevent movement of the glenoid component relative to the glenoid surface of the scapula after implant. The body also may include anchoring extending from the body for penetrating the glenoid surface of the scapula so as to help secure the body to the glenoid surface of the scapula. The glenoid component is used in one application to help correct bone defects and in another application for wear. A method of securing the glenoid component to a glenoid surface of a scapula so as to provide a bearing surface for a head portion of a humerus is also disclosed.

Claims

1. An augmented glenoid component for securement to a glenoid surface of a scapula so as to provide a bearing surface for a head portion of a humerus, the augmented glenoid component comprising:

a body;

a first surface on said body and configured to contact the glenoid surface of the scapula;

a second surface on said body and configured to be contacted by the head portion of the humerus; and

a buttress formed in said first surface of said body,

wherein said body further includes anchoring adapted to penetrate the glenoid surface of the scapula, and

wherein said anchoring extends entirely from said buttress.

2. The augmented glenoid component of claim 1, wherein:

said buttress defines a first buttress surface and a second buttress surface; and

said first buttress surface is positioned relative to said first surface at an angle θ

, wherein 45°

<

θ

<

135°

.

3. The augmented glenoid component of claim 2, wherein said anchoring is substantially perpendicular to said second buttress surface.

4. The augmented glenoid component of claim 2, wherein said anchoring is substantially parallel to said first buttress surface.

5. The augmented glenoid component of claim 2, wherein said second buttress surface is positioned perpendicular to said first buttress surface.

6. The augmented glenoid component of claim 5, wherein said second buttress surface is substantially parallel to said first body surface.

7. An augmented glenoid component for securement to a glenoid surface of a scapula so as to provide a bearing surface for a head portion of a humerus, the augmented glenoid component comprising:

a body;

a first surface on said body and configured to contact the glenoid surface of the scapula;

a second surface on said body and configured to be contacted by the head portion of the humerus; and

a buttress formed in said first surface of said body,

wherein said body further includes anchoring adapted to penetrate the glenoid surface of the scapula, and

wherein said anchoring extends from said first surface and said buttress.

8. The augmented glenoid component of claim 7, wherein said anchoring comprises an anchor peg.

9. The augmented glenoid component of claim 7, wherein said anchoring comprises an anchor keel.

10. The augmented glenoid component of claim 7, wherein said anchoring straddles said first surface and said buttress.

11. An augmented glenoid component for securement to a glenoid surface of a scapula so as to provide a bearing surface for a head portion of a humerus, the augmented glenoid component comprising:

a body;

a first surface on said body and configured to contact the glenoid surface of the scapula;

a second surface on said body and configured to be contacted by the head portion of the humerus; and

a buttress formed in said first surface of said body,

wherein said body comprises a backing member having said first surface of said body, said second body surface of said body, and said buttress defined therein, and the augmented glenoid component further comprises;

a bearing insert member securable to said backing member,

wherein said backing member is formed of one of a metal, a ceramic, a composite, and a biological material,

wherein said bearing insert member is formed of one of a plastic, a ceramic, and a composite,

wherein said backing member includes a plurality of holes each of which is configured to allow passage of a securing member for securing said backing member to the glenoid surface of the scapula,

wherein said plurality of holes extend outwardly from said buttress member.

12. The augmented glenoid component of claim 11, wherein said biological material of said backing member comprises one of bone, bone graft, and bone substitute material.

13. The augmented glenoid component of claim 11, wherein said metal of said backing member comprises one of a titanium alloy, a cobalt alloy, and a stainless steel alloy.

14. The augmented glenoid component of claim 11, wherein said ceramic of said backing member comprises an alumina, a zirconia, and an alumina/zirconia composite ceramic.

15. The augmented glenoid component of claim 11, wherein said composite of said backing member comprises a carbon fiber/PEEK composite.

16. The augmented glenoid component of claim 11, wherein said bearing insert member comprises one of a polyethylene, alumina, zirconia, and alumina/zirconia composite or composite material.

17. An augmented glenoid component for securement to a glenoid surface of a scapula so as to provide a bearing surface for a head portion of a humerus, the augmented glenoid component comprising:

a body having a medial surface and a humerus surface;

said medial surface configured to contact the glenoid surface of the scapula;

said humerus surface configured to be contacted by the head portion of the humerus;

an interruption extending from said medial surface and defining a first interruption surface positioned relative to said medial surface at an angle θ

in which 45°

<

θ

<

135°

, and a second interruption surface positioned relative to a line parallel to said medial surface at an angle Φ

in which 0°

<

Φ

<

90°

; and

anchoring,

Wherein said anchoring extends from said medial surface, and

wherein said anchoring extends from said medial surface and said interruption.

18. The augmented glenoid component of claim 17, wherein said anchoring comprises a plurality of anchor pegs.

19. The augmented glenoid component of claim 17, wherein said anchoring comprises a keel.

20. The augmented glenoid component of claim 17, wherein said anchoring straddles said interruption and said medial surface.

21. An augmented glenoid component for securement to a glenoid surface of a scapula so as to provide a bearing surface for a head portion of a humerus, the augmented glenoid component comprising:

a body having a medial surface and a humerus surface;

said medial surface configured to contact the glenoid surface of the scapula;

an interruption extending from said medial surface and defining a first interruption surface positioned relative to said medial surface at an angle θ

in which 45°

<

θ

<

135°

, and a second interruption surface positioned relative to a line parallel to said medial surface at an angle Φ

in which 0°

<

Φ

<

90°

; and

anchoring,

wherein said body comprises a backing member having said medial surface, said humerus body surface, and said interruption defined therein; and

the augmented glenoid component further comprises;

a bearing insert member securable to said backing member, and

wherein (i) said backing member is formed of one of a metal, a ceramic, a composite, and a biological material; and

(ii) said bearing insert member is formed of one of a plastic, a ceramic, and a composite.

22. The augmented glenoid component of claim 21, wherein said biological material of said backing member comprises one of bone, bone graft, and bone substitute material.

23. The augmented glenoid component of claim 21, wherein said metal of said backing member comprises one of a titanium alloy, a cobalt alloy, and a stainless steel alloy.

24. The augmented glenoid component of claim 21, wherein said ceramic of said backing member comprises an alumina, a zirconia, and an alumina/zirconia composite ceramic.

25. The augmented glenoid component of claim 21, wherein said composite of said backing member comprises a carbon fiber/PEEK composite.

26. The augmented glenoid component of claim 21, wherein said bearing insert member comprises one of a polyethylene, alumina, zirconia, and alumina/zirconia composite or composite material.

27. The augmented glenoid component of claim 21, wherein said backing ember includes a plurality of holes each of which is configured to allow passage of a securing member for securing said backing member to the glenoid surface of the scapula.

28. A method of securing an augmented glenoid component to a glenoid surface of a scapula so as to provide a bearing surface for a head portion of a humerus, said augmented glenoid component having (i) a body having (a) a first body surface configured to contact the glenoid surface of the scapula, and (b) a second body surface configured to be contacted by the head portion of the humerus, and (ii) a buttress extending from said first body surface, the method comprising the steps of:

forming a buttress-shaped recess in a glenoid surface of a scapula; and

securing said augmented glenoid component to the glenoid surface of the scapula such that (i) said first body surface is positioned in contact with the glenoid surface of the scapula, and (ii) said buttress is positioned in said step-shaped recess,

wherein said forming step includes the step of removing said buttress-shaped recess in the glenoid surface of the scapula with a bone cutter.

29. The method claim 28, wherein said removing step includes forming at least a portion of said buttress-shaped recess with a concave surface.

30. The method of claim 28, wherein:

said augmented glenoid component further has (i) a backing member, and (ii) a bearing insert member which is securable to said backing member;

said first body surface of said body and said buttress are defined in said backing member;

said second body surface of said body is defined in said bearing insert member; and

said securing step includes the steps of (i) securing said backing member to the glenoid surface of the scapula such that (a) said first body surface of said backing member is positioned in contact with the glenoid surface of the scapula, and (b) said portion of said buttress of said backing member is positioned in said buttress-shaped recess; and

(ii) securing said bearing insert member to said backing member.

31. The method of claim 28, wherein:

said buttress include a first buttress surface and a second buttress surface; and

said first buttress surface is positioned relative to said medial surface at an angle θ

wherein 45°

<

θ

<

135°

.

32. The method of claim 31, wherein said first buttress surface is positioned perpendicular to said second buttress surface.

33. An augmented glenoid component for securement to a glenoid surface of a scapula so as to provide a bearing surface for a head portion of a humerus, the augmented glenoid component comprising:

a body having a medial surface and a humerus surface;

said medial surface configured to contact the glenoid surface of the scapula;

said humerus surface configured to be contacted by the head portion of the humerus;

an interruption extending from said medial surface and defining a first interruption surface positioned relative to said medial surface at an angle θ

in which 45°

<

θ

<

135°

, and a second interruption surface positioned relative to a line parallel to said medial surface at an angle Φ

in which 0°

<

Φ

<

90°

; and

anchoring,

wherein said anchoring extends from said medial surface, and

wherein said anchoring extends entirely from said interruption.

34. An augmented glenoid component for securement to a glenoid surface of a scapula so as to provide a bearing surface for a head portion of a humerus, the augmented glenoid component comprising:

a body having a medial surface and a humerus surface;

said medial surface configured to contact the glenoid surface of the scapula;

said humerus surface configured to be contacted by the head portion of the humerus;

an interruption extending from said medial surface and defining a first interruption surface positioned relative to said medial surface at an angle θ

in which 45°

<

θ

<

135°

, and a second interruption surface positioned relative to a line parallel to said medial surface at an angle Φ

in which 0°

<

Φ

<

90°

; and

anchoring,

wherein said body comprises a backing member having said medial surface, said humerus body surface, and said interruption defined therein; and

the augmented glenoid component further comprises;

a bearing insert member securable to said backing member,

wherein said backing member includes a plurality of holes each of which is configured to allow passage of a securing member for securing said backing member to the glenoid surface of the scapula, and

wherein said plurality of holes extend outwardly from said interruption.

35. An augmented glenoid component for securement to a glenoid surface of a scapula so as to provide a bearing surface for a head portion of a humerus, the augmented glenoid component comprising:

a body having a medial surface and a humerus surface;

said medial surface configured to contact the glenoid surface of the scapula;

said humerus surface configured to be contacted by the head portion of the humerus;

an interruption extending from said medial surface and defining a first interruption surface positioned relative to said medial surface at an angle θ

in which 45°

<

θ

<

135°

, and a second interruption surface positioned relative to a line parallel to said medial surface at an angle Φ

in which 0°

<

Φ

<

90°

; and

anchoring,

wherein said body comprises a backing member having said medial surface, said humerus body surface, and said interruption defined therein; and

the augmented glenoid component further comprises;

a bearing insert member securable to said backing member,

wherein said backing member includes a plurality of holes each of which is configured to allow passage of a securing member for securing said backing member to the glenoid surface of the scapula, and

wherein said plurality of holes extend outwardly from and are distributed in said medial surface and said interruption.

36. A method of securing an augmented glenoid component to a glenoid surface of a scapula so as to provide a bearing surface for a head portion of a humerus, said augmented glenoid component having (i) a body having (a) a first body surface configured to contact the glenoid surface of the scapula, and (b) a second body surface configured to be contacted by the head portion of the humerus, and (ii) a buttress extending from said first body surface, the method comprising the steps of:

forming a buttress-shaped recess in a glenoid surface of a scapula; and

securing said augmented glenoid component to the glenoid surface of the scapula such that (i) said first body surface is positioned in contact with the glenoid surface of the scapula, and (ii) said buttress is positioned in said step-shaped recess,

wherein said augmented glenoid component further has an anchor; and

wherein said securing step includes the steps of;

(i) forming an anchor hole in the glenoid surface of the scapula, and (ii) advancing said anchor into said anchor hole.