Patient-specific instrumentation for implant revision surgery

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.