Tibial tray with adjustable keel

• US 6,506,216 B1
• Filed: 06/16/2000
• Issued: 01/14/2003
• Est. Priority Date: 05/13/1998
• Status: Expired due to Term

• Current Assignee: Depuy Products Incorporated (Johnson & Johnson)
• Original Assignee: Depuy Products Incorporated (Johnson & Johnson)
• Inventors: Dutiel, Scott E., McCue, Diana F.
• Primary Examiner(s): McDermott, Corrine
• Assistant Examiner(s): STEWART, ALVIN J
• Application Number:
  US09/595,190
• Time in Patent Office: 942 Days
• Field of Search: 623/20-4-
• US Class Current: 623/20.34
• CPC Class Codes: A61F 2/389 Tibial components A61F2/3868 takes precedence
• CPC Class Codes: A61F 2002/30225 Flat cylinders, i.e. discs
• CPC Class Codes: A61F 2002/30354 Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis
• CPC Class Codes: A61F 2002/30507 using a threaded locking member, e.g. a locking screw or a set screw
• CPC Class Codes: A61F 2002/30514 using a locking washer
• 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 2002/30553 for adjusting a position by translation along an axis
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30606 Sets comprising both cemented and non-cemented endoprostheses
• CPC Class Codes: A61F 2002/30616 Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/3069 Revision endoprostheses
• CPC Class Codes: A61F 2002/30774 internally-threaded
• CPC Class Codes: A61F 2002/30777 Oblong apertures
• CPC Class Codes: A61F 2002/30785 parallel
• 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 2002/30896 perpendicular with respect to each other
• 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 2230/0069 cylindrical
• 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

Abstract

A tibial prosthesis includes a tibial platform having a medial-lateral center and an inferior surface matable with a resected proximal tibia, and a modular keel that is fixable to the inferior surface and adjustable in a medial-lateral direction with respect to the medial-lateral center of the tibial platform.

Claims

1. A tibial prosthesis comprising:

a tibial tray having a medial-lateral center and an inferior surface matable with a resected proximal tibia; and

a modular keel comprising a tray mating portion and a keel portion, the keel portion having a plurality of wing elements suitable for anchoring the keel within the proximal tibia, the tray mating portion being fixable to the inferior surface and adjustable in a medial-lateral direction with respect to the medial-lateral center of the tibial tray to allow medial-lateral adjustment of the keel portion with respect to the tray.

2. The prosthesis of claim 1, further comprising a stem receivable within the central canal of a tibia.

3. The prosthesis of claim 2, wherein the stem is modular and matable with the modular keel.

4. The prosthesis of claim 1, wherein the tibial tray includes at least one slot extending in a medial-lateral direction and at least one mating element, fixable to the modular keel, extends through the at least one slot to secure the modular keel to the tibial tray at a preselected offset from the medial-lateral center of the tibial tray.

5. The prosthesis of claim 4, wherein four mating elements secure the modular keel to the tibial tray.

6. The prosthesis of claim 4, wherein one mating element secures the modular keel to the tibial tray.

7. The tibial prosthesis of claim 1, wherein the tibial tray has a superior surface, the prosthesis further comprising a tibial bearing element fixed to the superior surface of the tibial tray.

8. The tibial prosthesis of claim 7, wherein the modular keel is adjustable in the medial-lateral direction with respect to the tibial bearing element.

9. A tibial prosthesis comprising:

a tibial tray having a medial-lateral center, an inferior surface matable with a resected proximal tibia, two or more slots extending in a medial-lateral direction, and two or more mating elements extending through the two or more slots;

a modular keel fixable to the inferior surface and adjustable in a medial-lateral direction with respect to the medial-lateral center of the tibial tray;

wherein the two or more mating elements extend through the two or more slots to secure the modular keel to the tibial tray and fix the medial-lateral position of the keel with respect to the tibial tray.

10. The prosthesis of claim 9, wherein four mating elements secure the modular keel to the tibial tray.

11. The prosthesis of claim 9, further comprising a stem receivable within the central canal of a tibia.

12. The prosthesis of claim 11, wherein the stem is modular and matable with the modular keel.