Patent ID: 6385475
Filing Date: 2002-05-07
Classification: A61B,A61F,G01S,Y10S

Abstract:
A device for the preoperative determination of positioning data of endoprosthetic parts of a central joint relative to two bones forming the central joint with marking elements securable to the bones, comprising:a measuring device for determining the position of the marking elements in a space; a data processing system adapted to receive signals corresponding to positioning data of the marking elements from the measuring device; at least one marking element being provided for each of the two bones forming the central joint as well as for each of the two bones adjoining these and connected to them via an outer joint; said data processing system being responsive to the signals during movement of the bones about the two outer joints to determine the points of greatest invariance as outer articular points; and the data processing system determining a characteristic direction for each of the bones from the positioning of the outer articular points and the position of an inner articular point of the two bones forming the central joint.