Patient-specific instrumentation for implant revision surgery

  • US 10,582,969 B2
  • Filed: 07/08/2016
  • Issued: 03/10/2020
  • Est. Priority Date: 07/08/2015
  • Status: Active Grant
First Claim
Patent Images

1. A method for creating at least one model of a patient-specific instrumentation jig for implant revision using a processing system, comprising:

  • obtaining at least one image of at least part of a bone requiring implant revision and of an implanted implant on the bone, the at least one image being patient specific;

    identifying at least one reference anchor surface on the bone from the at least one image of the bone, the reference anchor surface configured to receive at least one guide reference;

    determining an implant abutment surface on the implanted implant; and

    generating and outputting a virtual reference jig model using at least the identified reference anchor surface and the determined implant abutment surface, the reference jig model comprising at least one contact surface corresponding to the determined implant abutment surface for complementary connection with the determined implant abutment surface, at least one guide interfacing portion configured to guide a planting of the at least one guide reference in the reference anchor surface, and a body interconnecting the at least one contact surface and the at least one guide interfacing portion, the body having a patient-specific geometry between the at least one contact surface and the at least one guide interfacing portion, so as to position and/or orient the at least one guide interfacing portion relative to the at least one reference anchor surface, for subsequently planting the at least one guide reference in the at least one reference anchor surface as identified when the at least one contact surface is complementarily connected with the determined implant abutment surface; and

    generating a revision jig model using at least the position and orientation of the at least one guide reference and a virtual model of a replacement implant, the jig model comprising at least another guide interfacing portion for engagement with the at least one guide reference, at least one tool interface portion positioned and/or oriented relative to the guide reference and at least one patient-specific geometry between the guide interfacing portion and the at least one tool interface portion, the at least one tool interface portion adapted to be interfaced with a tool altering the bone to perform cuts for subsequently installing the replacement implant.

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