Modular humeral head resurfacing system

• US 20060009852A1
• Filed: 09/13/2005
• Published: 01/12/2006
• Est. Priority Date: 07/27/2001
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Winslow, Nathan A., Warren, Russell, Lee, Don
• Granted Patent: US 8,753,402 B2
• Time in Patent Office: Days
• US Class Current: 623/19.140
• CPC Class Codes: A61B 17/1684 for the shoulder
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• CPC Class Codes: A61F 2/40 for shoulders
• CPC Class Codes: A61F 2/4003 Replacing only the epiphyseal or metaphyseal parts of the humerus, i.e. endoprosthesis not comprising an entire humeral shaft replacing only the epiphyseal or metaphyseal parts of the femur A61F2/3601
• CPC Class Codes: A61F 2/4014 Humeral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic humeral shafts
• CPC Class Codes: A61F 2/4081 Glenoid components, e.g. cups
• CPC Class Codes: A61F 2/4684 Trial or dummy prostheses
• CPC Class Codes: A61F 2002/30062 (bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
• CPC Class Codes: A61F 2002/30113 circular
• CPC Class Codes: A61F 2002/30154 square
• CPC Class Codes: A61F 2002/30156 triangular
• CPC Class Codes: A61F 2002/30181 Y-shaped
• CPC Class Codes: A61F 2002/30207 Double convex cones, i.e. element having two convex cones, one at each of its opposite ends
• CPC Class Codes: A61F 2002/3021 frustoconical
• CPC Class Codes: A61F 2002/30217 hollow cones, e.g. tubular-like cones
• CPC Class Codes: A61F 2002/30224 cylindrical
• CPC Class Codes: A61F 2002/30225 Flat cylinders, i.e. discs
• CPC Class Codes: A61F 2002/30227 arched, domed or vaulted
• CPC Class Codes: A61F 2002/30276 frustopyramidal
• CPC Class Codes: A61F 2002/30332 : Conically- or frustoconically-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30339 : Double cones, i.e. connecting element having two conical connections, one at each of its opposite ends
• CPC Class Codes: A61F 2002/30474 : using an intermediate sleeve interposed between both prosthetic parts to be coupled
• CPC Class Codes: A61F 2002/30538 : for adjusting angular orientation
• CPC Class Codes: A61F 2002/30553 : for adjusting a position by translation along an axis
• CPC Class Codes: A61F 2002/30578 : having apertures, e.g. for receiving fixation screws
• 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 2002/30774 : internally-threaded
• CPC Class Codes: A61F 2002/30785 : parallel
• CPC Class Codes: A61F 2002/30787 : inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/30827 : Plurality of grooves
• CPC Class Codes: A61F 2002/30843 : Pyramidally-shaped
• CPC Class Codes: A61F 2002/3085 : with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
• CPC Class Codes: A61F 2002/30873 : Threadings machined on non-cylindrical external surfaces
• 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 2002/30884 : Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity
• CPC Class Codes: A61F 2002/30906 : shot- sand- or grit-blasted
• CPC Class Codes: A61F 2002/4007 : implanted without ablation of the whole natural humeral head
• 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 2210/0004 : bioabsorbable
• 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 2230/0006 : circular
• CPC Class Codes: A61F 2230/0021 : square
• CPC Class Codes: A61F 2230/0023 : triangular
• CPC Class Codes: A61F 2230/006 : Y-shaped
• CPC Class Codes: A61F 2230/0067 : conical
• CPC Class Codes: A61F 2230/0069 : cylindrical
• CPC Class Codes: A61F 2230/0086 : Pyramidal, tetrahedral, or wedge-shaped
• CPC Class Codes: A61F 2250/0006 : for adjusting angular orientation
• CPC Class Codes: A61F 2250/0008 : for adjusting a position by translation along an axis or two perpendicular axes
• 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

Abstract

A two piece humeral component for use in joint arthroplasty which is adapted to be implanted into a joint and engaged by a socket component of the joint. The joint component includes a body having a first articulating surface and a second medial surface opposite the first articulating surface. The first articulating surface is adapted to be engaged by the socket and the second medial surface is adapted to be secured to mounting portion. The mounting portion has a first surface and a second medial surface. The first surface is adapted to be fixably engaged to the second mounting portion of the humeral component. The second medial surface is adapted to be secured to the humerus. A peg which has a first end adapted to engage a cavity found in the humerus is disposed on the mounting portion'"'"'s second medial surface.

Claims

1. A modular joint component for use in a joint arthroplasty, said modular joint component adapted to be implanted into a joint having a head and a neck to engage an articulating surface of the joint, said modular joint component comprising:

a head member having a first articulating surface and a second fixation surface opposite said first articulating surface, said first articulating surface operable to engage the articulating surface of the joint and said second fixation surface being adapted to be secured to a fixation component; and

said fixation component having a first surface adapted to be secured to said second fixation surface of said head member and a second surface which is generally opposite the first surface, said second surface having a fixation member adapted to be secured within at least one of the head and the head and neck of the joint, said fixation component defining a pair of coupling flanges.

2. The modular joint component as defined in claim 1 wherein said fixation component first surface comprises a locking taper.

3. The modular joint component as defined in claim 1 wherein said coupling flanges of said fixation element has a spherical convex shape.

4. The modular joint component as defined in claim 1 wherein the locking taper is a female locking taper.

5. The modular joint component as defined in claim 1 wherein the fixation member defines an exterior bone engaging thread.

6. The modular joint component as defined in claim 1 wherein said second surface of said fixation element is at least one of a generally flat shape and a generally spherical shape.

7. The modular joint component as defined in claim 1 wherein said coupling flanges are configured to be deformed into a spherical concave shape.

8. The modular joint component as defined in claim 1 wherein said head fixation surface defines an offset fixation component.

9. A modular joint component for use in a joint arthroplasty, said modular joint component adapted to be implanted into a joint having a head and a neck to engage an articulating surface of the joint, said modular joint component comprising:

a head member having a first articulating surface and a second fixation surface opposite said first articulating surface, said first articulating surface operable to engage the articulating surface of the joint and said second fixation surface being adapted to be secured to a head fixation portion of a bone fixation component; and

the bone fixation component adapted to be secured within a fixation member accepting aperture, said fixation component defining a bone engaging member, a head fixation portion, and a linear coupling flange.

10. The modular joint component as defined in claim 9 wherein said head fixation portion comprises a locking taper.

11. The modular joint component as defined in claim 10 wherein the locking taper is a female locking taper.

12. The modular joint component as defined in claim 10 wherein said coupling flange has a spherical convex shape.

13. The modular joint component as defined in claim 10 wherein the linear coupling flange defines an aperture.

14. The modular joint component as defined in claim 10 wherein said coupling flange has a first surface that is generally opposite the coupling surface that is at least one of a generally flat shape and a generally spherical shape.

15. A method for implanting a humeral component during shoulder arthroplasty, said method comprising:

resecting at least a portion of the head of a humerus;

preparing a hole in the head or neck of the humerus;

providing a fixation component having a plurality of coupling flanges that define a plurality of bone screw holes and a generally cylindrical fixation member extending from the shelf;

implanting the fixation component onto the humerus by inserting the fixation member into the hole prepared in the humerus;

inserting at least one bone screw in at least one hole defined by the coupling flanges;

providing a head member having a first articulating surface and a second fixation surface opposite the first articulating surface; and

securing the head member to the fixation component.

16. The method as defined in claim 15 further comprising reaming a spherical surface into the humerus.

17. The method as defined in claim 15 further comprising reaming a spherical convex surface into the humerus.

18. The method as defined in claim 15 wherein securing the head member to the fixation component includes attaching the head member to the fixation component by way of a locking taper.

19. The method as defined in claim 15 wherein the fixation member defines a bone engaging thread.

20. The method as defined in claim 15 further comprising rotatably adjusting the head member relative to the fixation component by way of the coupling member.

21. The method as defined in claim 15 further comprising bending the coupling flanges in the operating room.