PATIENT-SPECIFIC INSTRUMENTATION FOR IMPLANT REVISION SURGERY

摘要

A system for generating a PSI jig model for implant revision comprises a reference anchor surface identifying module configured to identify at least one reference anchor surface from at least one patient specific image of a bone and of an implanted implant, the reference anchor surface configured to receive a guide reference(s). An implant abutment surface determining module determines an implant abutment surface from the patient specific bone image. A PSI reference jig model generator module generates and outputs a reference jig model using the identified reference anchor surface and the determined implant abutment surface, the reference jig model comprising contact surface(s) corresponding to the determined implant abutment surface for complementary connection with the determined implant abutment surface, guide interfacing portion(s) configured to guide a planting of the guide reference in the reference anchor surface, and a patient-specific geometry between contact surface(s) and the guide interfacing portion, so as to position and/or orient the guide interfacing portion relative to the reference anchor surface, for subsequently planting the guide reference(s) in the reference anchor surface as identified when the contact surface(s) is complementarily connected with the determined implant abutment surface. A method for creating patient-specific instrumentation jig for implant revision is also provided.

主权项

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, anda patient-specific geometry between the at least one contact surface and the at least one guide interfacing portion, the patient-specific geometry adapted to position and/or orient the at least one guide interfacing portion relative to the at least one reference anchor surface, during the planting of the at least one guide reference in the at least one reference anchor surface, when the at least one contact surface is complementarily connected with the determined implant abutment surface.