Patient-specific augments

  • US 10,603,179 B2
  • Filed: 08/09/2017
  • Issued: 03/31/2020
  • Est. Priority Date: 02/27/2006
  • Status: Active Grant
First Claim
Patent Images

1. A method of preparing a knee joint for a femoral implant component, comprising:

  • reconstructing an image of a bone of the knee joint with a defect from a medical scan of the bone during a preoperative plan for a specific patient;

    incrementally manipulating a position of the virtual representations of an augment and the femoral implant component in the virtual knee joint;

    performing an initial virtual fitting of virtual representations of the augment and the femoral implant component in a virtual knee joint created from the image of the bone;

    manufacturing the augment, wherein manufacturing the augment includes providing the augment with a patient-specific and variable depth between a first implant-engaging surface and a second patient-specific three-dimensional surface;

    selecting the femoral implant component for the specific patient;

    preparing a bone end of the bone of the knee joint of the specific patient with standard resections configured to match a non-custom bone-engaging surface of the femoral implant component without resecting a three-dimensional surface of the defect in the bone;

    attaching the first implant-engaging surface of the augment to a portion of the bone-engaging surface of the femoral implant component;

    nestingly mating the second patient-specific three-dimensional surface of the augment to the three-dimensional surface of the defect, wherein the augment is a femoral augment engageable to the femoral implant component and to a distal femur of the knee joint;

    attaching the femoral implant component to the bone.

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