MODULAR KNEE PROSTHESIS

• US 20080027563A1
• Filed: 10/11/2007
• Published: 01/31/2008
• Est. Priority Date: 11/22/2002
• Status: Active Grant

• Current Assignee: Zimmer Technology Incorporated (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Zimmer Technology Incorporated (Zimmer Biomet Holdings, Inc.)
• Inventors: Johnson, Erin, Saladino, Joseph
• Granted Patent: US 7,527,650 B2
• Time in Patent Office: Days
• US Class Current: 623/39
• CPC Class Codes: A61F 2/38 for elbows or knees
• CPC Class Codes: A61F 2/3859 Femoral components
• CPC Class Codes: A61F 2/389 Tibial components A61F2/3868 takes precedence
• CPC Class Codes: A61F 2002/30187 D-shaped or half-disc-shaped
• CPC Class Codes: A61F 2002/30331 made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2002/30332 Conically- or frustoconically-shaped protrusion and recess
• 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 2002/30878 with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
• CPC Class Codes: A61F 2002/30892 parallel
• CPC Class Codes: A61F 2002/30975 made of two halves
• CPC Class Codes: A61F 2002/3895 unicompartimental
• 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 2230/0034 D-shaped

Abstract

A modular knee system having various distal posterior femoral components that are interchangeable with each other and with various patellar-femoral joint components. Preferably, the modular knee system has a variety of components that are interchangeable and connectable to resurface the distal femur using either a unicompartmental femoral knee prosthesis or a bicompartmental femoral knee prosthesis. These components include a medial distal posterior femoral component, a lateral distal posterior femoral component, a patellar-femoral joint component, and an interconnection mechanism to modularly connect the components together.

Claims

1. A method of assembling a knee prosthesis for implantation into a patient, the method comprising:

providing a plurality of posterior femoral joint components;

providing a distal posterior femoral joint component;

determining the ethnicity of the patient;

selecting one of the plurality of posterior femoral joint components based on the patient'"'"'s ethnicity;

assembling the selected one of the plurality of posterior femoral joint components and the distal posterior femoral joint component to form the knee prosthesis.

2. The method of claim 1, wherein the step of providing a distal posterior femoral joint component further comprises providing a plurality of distal posterior femoral joint components, the method further comprising, before the assembling step, the step of selecting at least one of the plurality of distal posterior femoral joint components.

3. The method of claim 2, wherein at least one of the plurality of distal posterior femoral joint components comprises at least two separate components.

4. The method of claim 2, wherein the distal posterior femoral joint component comprises a medial distal posterior femoral joint component and a lateral distal posterior femoral joint component.

5. The method of claim 1, wherein the distal posterior femoral joint component comprises at least two separate components.

6. The method of claim 5, wherein the distal posterior femoral joint component comprises a medial distal posterior femoral joint component and a lateral distal posterior femoral joint component.

9. The method of claim 6, wherein at least one of the plurality of distal posterior femoral joint components comprises at least two separate components.

10. The method of claim 9, wherein the distal posterior femoral joint component comprises a medial distal posterior femoral joint component and a lateral distal posterior femoral joint component.

7. A method of assembling a knee prosthesis for implantation into a patient, the method comprising:

providing a posterior femoral joint component;

providing a plurality of distal posterior femoral joint components;

determining the ethnicity of the patient;

selecting at least one of the plurality of the distal posterior femoral joint components based on the patient'"'"'s ethnicity;

assembling the posterior femoral joint component and the selected at least one of the plurality of distal posterior femoral joint components to form the knee prosthesis.

8. The method of claim 7, wherein the step of providing a posterior femoral joint component further comprises providing a plurality of posterior femoral joint components, the method further comprising, before the assembling step, the step of selecting one of the plurality of posterior femoral joint components.

11. A method of assembling a knee prosthesis for implantation into a patient, the method comprising:

providing a plurality of one of medial femoral condyle components and lateral femoral condyle components;

providing at least one of the other of medial femoral condyle components and lateral femoral condyle components;

determining the ethnicity of the patient;

selecting a medial femoral condyle component;

selecting a lateral femoral condyle component, wherein at least one of the medial femoral condyle component and the lateral femoral condyle component is selected based on the patient'"'"'s ethnicity; and

assembling the selected medial femoral condyle component and the selected lateral femoral condyle component to form the knee prosthesis.

12. The method of claim 11, wherein the second providing step further comprises providing a plurality of the other of medial femoral condyle components and lateral femoral condyle components.