Prosthetic tibial component with modular sleeve

  • US 7,291,174 B2
  • Filed: 08/15/2003
  • Issued: 11/06/2007
  • Est. Priority Date: 09/09/2002
  • Status: Active Grant
First Claim
Patent Images

1. A prosthetic knee system comprising:

  • a tibial component comprising a tibial tray, a stem and a keel, the tibial tray having a distal side and an opposite side, the stem extending from the distal side of the tibial tray, the keel extending between the distal side of the tray and the stem, a majority of the opposite side of the tibial tray being planar; and

    a modular sleeve comprising a proximal surface with a relief, a distal end, a terraced outer surface between the proximal surface and the distal end and an interior channel extending from the proximal surface to the distal end, the outer surface tapering from the proximal surface toward the distal end and the interior channel being sized and shaped to receive at least a portion of the stem of the tibial component;

    wherein the keel, stem, interior channel and relief are sized, shaped and positioned to allow the sleeve to be mounted on the tibial component with at least a portion of the stem of the tibial component received in the interior channel of the sleeve and at least a portion of the keel of the tibial component received in the relief of the sleeve;

    wherein the tibial component and the sleeve are capable of being assembled in an unlocked state and in a locked state, wherein in both the unlocked and locked states at least a portion of the stem of the tibial component is received in the interior channel of the sleeve;

    wherein the tibial component and the sleeve are capable of relative rotation when in the unlocked state; and

    wherein when the tibial component and the sleeve are in the locked state the stem of the tibial component and the sleeve frictionally interlock to prevent relative rotation between the tibial component and the sleeve.

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