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Knee instruments and methods

  • US 10,568,650 B2
  • Filed: 06/22/2017
  • Issued: 02/25/2020
  • Est. Priority Date: 03/25/2015
  • Status: Active Grant
First Claim
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1. A method for inserting pins in a femur, comprising:

  • attaching a bone contacting surface of a base to an anterior distal femoral cortex of the femur;

    positioning a distal edge of the bone contacting surface of the base at a place on the anterior distal femoral cortex where an anterior femoral resection is planned to exit the femur;

    coupling an alignment rod to the base;

    aligning the alignment rod with a mechanical axis of the femur;

    coupling a pin guide to the base, wherein when the bone contacting surface of the base is attached to the anterior distal femoral cortex, the distal edge of the bone contacting surface of the base is positioned at the place, the alignment rod is coupled to the base and aligned with the mechanical axis of the femur, and the pin guide is coupled to the base, a first hole extending through the pin guide is aimed at a first point on a distal end of the femur that is located along a Whiteside'"'"'s line associated with the femur that corresponds to a center of a trochlear groove of the femur, a second hole extending through the pin guide is aimed at a second point on the distal end of the femur that is in the trochlear groove, the first and second points are located between the anterior distal femoral cortex and an intramedullary canal of the femur, and the first and second holes of the pin guide are aligned with the mechanical axis of the femur and the bone contacting surface of the base; and

    inserting a first pin through the first hole of the pin guide, through the first point, and into the femur and inserting a second pin through the second hole of the pin guide, through the second point, and into the femur so that a leading end of the second pin exits the femur at the place to indicate that the anterior femoral resection will intersect the anterior distal femoral cortex at the place, wherein the first and second pins are inserted while the bone contacting surface of the base is attached to the anterior distal femoral cortex, the distal edge of the bone contacting surface of the base is positioned at the place, the alignment rod is coupled to the base and aligned with the mechanical axis of the femur, and the pin guide is coupled to the base, such that the first and second pins are located between the anterior distal femoral cortex and the intramedullary canal of the femur.

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