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

  • US 6,915,150 B2
  • Filed: 03/08/2002
  • Issued: 07/05/2005
  • 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 an endoprosthetic part 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 while determining the positions of the thigh bone and the hip bone, to determine a first articular point for said thigh bone in the area of the hip;

    the thigh and hip bone positions being determined by securely connecting marking elements to said bones and determining the respective positions of the marking elements using a measuring device that provides signals corresponding to the respective positions to a data processing system;

    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; and

    determining an orientation of the endoprosthetic part relative to the first characteristic direction.

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