Computer-assisted implant positioning system and methods

An implant positioning method comprising:

• acquiring, using a patient imaging device, an intraoperative patient-specific image of a target bone associated with a surgical implant;
• acquiring, using a computer, a 3D bone model of the target bone;
• acquiring, using the computer, a 3D computer model of a subject implant to be implanted in the target bone;
• registering, using the computer, a position of the 3D computer model of the subject implant relative to a position of the surgical implant in the intraoperative image of the target bone;
• registering, using the computer, a position of the 3D bone model of the target bone to a position of the target bone in the intraoperative image of the target bone;
• assessing, using the computer, the position of the registered 3D computer model of the subject implant relative to the position of the registered 3D bone model;
• evaluating, using the computer, the assessed position of the registered 3D computer model of the subject implant and target bone relative to a planned position of the surgical implant in the target bone of the patient;
• and
• outputting on a display, the evaluation of the assessed position of the registered 3D computer model of the subject implant and target bone relative to a planned position of the surgical implant in the target bone of the patient.

A computer-assisted implant positioning system comprising:

• a receiver;
• a memory operatively connected to the receiver;
• and
• a processor operatively coupled to the receiver and the memory, the processor configured to:
• receive preoperative patient-specific data for a patient that includes:
• a 3D bone model of a target bone of the patient, and
• a planned position of a subject implant in the target bone,
• receive a 3D computer model of the subject implant,
• receive a postoperative patient-specific 2D image of the target bone associated with the surgical implant,
• register the 3D computer model of the subject implant to the postoperative patient-specific 2D image associated with the surgical implant and determine a best fit for the 3D computer model of the subject implant to the postoperative patient-specific 2D image associated with the surgical implant,
• register the 3D bone model of the target bone to the postoperative patient-specific 2D image of the target bone and determine a best fit for the 3D bone model to the postoperative patient-specific 2D image,
• determine an achieved implant position based on the registered 3D computer model of the subject implant and the registered 3D bone model of the target bone, and
• assess the postoperative patient-specific image relative to the preoperative patient-specific data.