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Process and device for the preoperative determination of the positioning data endoprosthetic parts

  • US 7,033,360 B2
  • Filed: 03/19/2004
  • Issued: 04/25/2006
  • Est. Priority Date: 03/11/1997
  • Status: Expired due to Term
First Claim
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1. A method for the preoperative determination of positioning data of endoprosthetic parts of a knee joint relative to a thigh bone and a lower leg bone forming the knee joint, comprising the steps of:

  • moving the thigh bone of the knee joint relative to a corresponding hip bone, to determine a first articular point for said thigh bone in the area of the hip joint;

    determining a second articular point for said thigh bone in the area of the knee joint;

    determining a first characteristic direction for said thigh bone by way of a straight-line connection of the first and second articular points;

    moving the lower leg bone of the knee joint relative to a corresponding ankle bone, to determine a third articular point in the area of an ankle joint for said lower leg bone;

    determining a fourth articular point in the area of the knee joint for said lower leg bone;

    determining a second characteristic direction for said lower leg bone by way of a straight-line connection of the third and fourth articular points; and

    determining the orientation of endoprosthetic parts relative to the first and second characteristic directions.

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