Method and system for creating patient-specific instrumentation for chondral graft transfer

  • US 10,325,065 B2
  • Filed: 01/24/2013
  • Issued: 06/18/2019
  • Est. Priority Date: 01/24/2012
  • Status: Active Grant
First Claim
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1. A method for creating at least one patient-specific instrument model for chondral graft removal, comprising:

  • determining with a computer-assisted surgery processor unit a graft geometry from a defect region in a bone and cartilage digital model of an articular region of a bone, the graft geometry having a non-circular periphery corresponding to a defect in cartilage;

    identifying with the computer-assisted surgery processor unit at least one donor location from the bone and cartilage digital model, using the graft geometry;

    creating with the computer-assisted surgery processor unit a digital model of at least one graft-removal patient-specific instrument using the at least one donor location, the graft geometry, and the bone and cartilage digital model, the graft-removal patient-specific instrument model comprising an interface surface shaped as a function of the bone and cartilage digital model for the at least one graft-removal patient-specific instrument to be selectively positioned on at least one of the bone and cartilage to remove cartilage from the at least one donor location, and a tooling end having a cutout with a geometry corresponding to the graft geometry for removing the cartilage with said graft geometry, the cutout having said non-circular periphery to match the defect; and

    outputting with the computer-assisted surgery processor unit the digital model of the at least one graft-removal patient-specific instrument as a digital fabrication file.

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