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Method and system for planning/guiding alterations to a bone

  • US 8,718,820 B2
  • Filed: 08/17/2012
  • Issued: 05/06/2014
  • Est. Priority Date: 03/25/2008
  • Status: Active Grant
First Claim
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1. A computer-assisted surgery system for at least one of planning and/guiding an alteration to a bone in surgery, the computer-assisted surgery system comprising:

  • a trackable member adapted to be secured to the bone, the trackable member having a first inertial sensor unit producing orientation-based data for at least two degrees of freedom in orientation of the trackable member;

    a positioning block adapted to be secured to the bone, the positioning block having a second inertial sensor unit producing orientation-based data for at least two degrees of freedom in orientation of the positioning block, with at least an orientation of the positioning block being adjustable once the positioning block is secured to the bone, to reach a desired orientation at which the positioning block is used to guide at least one tool in altering the bone;

    a processing system providing an orientation reference related to the bone from the orientation-based data of the trackable member, the processing system comprising;

    a signal interpreter for determining an orientation of the trackable member and of the positioning block from the orientation-based data; and

    a parameter calculator for calculating alteration parameters related to an actual orientation of the positioning block with respect to the bone as a function of the orientation reference and of the orientation of the positioning block.

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