System and Method for Acetabular Cup

• US 20110015752A1
• Filed: 07/14/2009
• Published: 01/20/2011
• Est. Priority Date: 07/14/2009
• Status: Abandoned Application

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Meridew, Jason D.
• Application Number:
  US12/502,828
• Publication Number:
  US 20110015752A1
• Time in Patent Office: Days
• US Class Current: 623/22.24
• 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 2002/30332 Conically- or frustoconically-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30495 using a locking ring
• CPC Class Codes: A61F 2002/3054 about a connection axis or implantation axis for selecting any one of a plurality of radial orientations between two modular parts, e.g. Morse taper connections, at discrete positions, angular positions or continuous positions
• CPC Class Codes: A61F 2002/3092 having an open-celled or open-pored structure
• CPC Class Codes: A61F 2002/3403 Polar aperture
• 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 2310/00011 Metals or alloys
• CPC Class Codes: A61F 2310/00179 Ceramics or ceramic-like structures

Abstract

An acetabular implant assembly for replacing a portion of the anatomy is provided. The acetabular implant assembly can include a fiber-reinforced polymeric cup having an exterior surface that engages the anatomy and an interior surface. The acetabular implant assembly can also include a metal or ceramic bearing liner, which can be coupled to the interior surface of the with an acetabular implant assembly cup via a taper lock connection. The metal or ceramic bearing liner can have an interior bearing surface. The acetabular implant assembly can include a metal articulating member, which can be movable within the interior bearing surface to replace the articulating portion of the anatomy.

Claims

1. An acetabular implant assembly for replacing an articulating portion of an anatomy comprising:

a fiber-reinforced polymeric cup having an interior surface and an exterior surface that engages the anatomy;

a metal or ceramic bearing liner coupled to the interior surface of the cup via a taper lock connection, the metal or ceramic bearing liner having an interior bearing surface; and

an articulating member movable within the interior bearing surface to replace the articulating portion of the anatomy.

2. The acetabular implant assembly of claim 1, wherein the cup is an acetabular cup, and the articulating member is a femoral head implant.

3. The acetabular implant assembly of claim 1, wherein the cup is reinforced with carbon fibers.

4. The acetabular implant assembly of claim 2, wherein the acetabular cup is composed of a polyetheretherketone reinforced with carbon fibers.

5. The acetabular implant assembly of claim 4, wherein the acetabular cup has a wall thickness, which is between about 1.0 millimeter (mm) to about 5.0 millimeters (mm).

6. The acetabular implant assembly of claim 5, wherein the femoral head implant includes a ball coupled to a stem, and the wall thickness of the acetabular cup enables the ball to have a diameter that is between about 22 millimeters (mm) to about 60 millimeters (mm).

7. The acetabular implant assembly of claim 1, wherein the metal bearing liner and the articulating member are each formed from a biocompatible material selected from the group comprising:

titanium, titanium alloy, ceramic, stainless steel, cobalt-chromium-molybedenum alloy and combinations thereof.

8. The acetabular implant assembly of claim 2, wherein the femoral head implant is formed from a biocompatible metal or metal alloy.

9. An acetabular implant assembly for replacing an articulating portion of an anatomy comprising:

an acetabular cup composed of a carbon fiber-reinforced polyetheretherketone material and having an exterior surface that engages the anatomy and an interior surface;

a metal bearing liner coupled to the interior surface of the acetabular cup via a taper lock connection, the bearing liner including an articulated bearing surface; and

a metal femoral head implant including a head that articulates within the interior surface of the bearing liner.

10. The acetabular implant assembly of claim 9, wherein the acetabular cup has a wall thickness, which is between about 1.0 millimeter (mm) to about 5.0 millimeters (mm).

11. The acetabular implant assembly of claim 10, wherein the femoral head implant includes a ball coupled to a stem, and the wall thickness of the acetabular cup enables the ball to have a diameter that is between about 22 millimeters (mm) to about 60 millimeters (mm).

12. The acetabular implant assembly of claim 10, wherein the metal bearing liner and the metal femoral head implant are each formed from a biocompatible material selected from the group comprising:

titanium, titanium alloy, stainless steel, cobalt-chromium-molybedenum alloy and combinations thereof.

13. A method of replacing an articulating portion of an anatomy with an acetabular implant assembly comprising:

inserting a fiber-reinforced polymeric acetabular cup into a prepared portion of the anatomy;

coupling a metal bearing liner to an interior surface of the polymeric acetabular cup; and

coupling a metal femoral head implant to the metal bearing liner.

14. The method of claim 13, wherein inserting the polymeric acetabular cup into a prepared portion of the anatomy further comprises:

inserting a carbon-fiber reinforced polyetheretherketone acetabular cup into the anatomy.

15. The method of claim 13, wherein coupling the metal femoral head implant to the metal bearing liner further comprises:

articulating the metal femoral head implant within the metal bearing liner.

16. The method of claim 13, wherein coupling the metal bearing liner to the interior surface of the polymeric acetabular cup further comprises:

coupling the metal bearing liner to the polymeric acetabular cup with a taper lock connection.