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Customized arthroplasty cutting guides and surgical methods using the same

  • US 9,402,637 B2
  • Filed: 01/24/2013
  • Issued: 08/02/2016
  • Est. Priority Date: 10/11/2012
  • Status: Active Grant
First Claim
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1. An arthroplasty cutting guide for making resections in a knee region of a patient femur in preparing a patient knee for the implantation of a femoral implant and a tibial implant, the knee region including surface topography including surface contours of a femoral condylar surface and a trochlear groove surface, the femoral implant including:

  • an articular condylar surface;

    a femur contacting side opposite the articular condylar surface and including a distal resection contacting surface, a posterior resection contacting surface, and a chamfer resection contacting surface; and

    a first distal-proximal thickness extending perpendicular from the distal resection contacting surface to the articular condylar surface, the tibial implant including;

    an articular plateau surface;

    a tibia contacting side opposite the articular plateau surface and including a proximal resection contacting surface; and

    a second distal-proximal thickness extending perpendicular from the proximal resection contacting surface to the articular plateau surface, the arthroplasty cutting guide comprising;

    a patient specific mating region custom configured to interdigitate with the topography of the knee region and comprising surface contours that are a general negative image of the surface contours of the femoral condylar surface and the surface contours of the trochlear groove;

    a distal resection slot configured to guide a distal resection in the knee region when the patient specific mating region interdigitates with the topography of the knee region such that the surface contours of the mating region make corresponding surface contact with the surface contours of the femoral condylar surface and the trochlear groove; and

    a distal planar surface parallel to the distal resection slot and distally spaced apart from the distal resection slot by a distance equal to the sum of the first and second distal-proximal thicknesses.

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