Patient-matched surgical component and methods of use

A computer-readable medium including instructions that, when executed by a computing device, cause the computing device to perform operations comprising:

• generating a representative model of an anatomical feature from an image of a patient's anatomy;
• using the model to select a virtual surgical component;
• installing the virtual surgical component on the representative model of the anatomical feature by mating a surface of the virtual surgical component with the anatomical feature in a predefined spatial relationship;
• tracking movement of a surgical cutting instrument with a tracking system;
• tracking movement of the anatomical feature with the tracking system when the surgical cutting instrument is moved within a measurement field of the tracking system;
• displaying the representative model and a representation of the surgical cutting instrument on a display of the surgical navigation system;
• and
• displaying a cutting plane of the surgical cutting instrument relative to the anatomical feature in the representative model.

A system for conducting navigated knee arthroplasty on a patient, the system comprising:

• a controller;
• a computer-readable storage medium including instructions that, when executed by the controller, cause the controller to perform operations comprising:
• acquiring a representation of a knee joint of the patient;
• creating a three-dimensional virtual model of the knee joint of the patient from the representation;
• identifying bony landmarks on a femur within the three-dimensional virtual model of the knee joint;
• developing a surgical protocol for the patient including anatomic orientation information of the femur from an analysis of the bony landmarks;
• tracking with an optical locator a retro-reflective marker array affixed to a surgical cutting instrument;
• and
• displaying a current cut plane of the surgical cutting instrument on a surgical display during surgery in reference to a planned cut plane from the surgical protocol, wherein the surgical display is located outside of a sterile field in which the surgical cutting instrument is located, the current cut plane comprising a cutting path of the surgical cutting instrument determined from the surgical plan.

A computer-readable medium for use in performing a surgical procedure aided by a surgical navigation system, the computer-readable medium including instructions that, when executed by a controller, cause the controller to perform operations comprising:

• generating a representative model of an anatomical feature from an image of anatomy of a patient;
• creating a virtual representation of a patient-matched surgical component based on the representative model;
• displaying the virtual representation on the representative model;
• manipulating the representative model of the anatomical feature and the virtual representation of the patient-matched surgical component to gather surgical information using a computer-operated planning program;
• planning a surgical protocol from the gathered surgical information, the surgical protocol including a cutting plane disposed relative to the anatomical feature;
• displaying a surgical plan image from the surgical protocol and the patient-matched surgical component on a computer display, the surgical plan image including a representation of the cutting plane relative to the anatomical feature;
• tracking a resection plane of a surgical instrument on the computer display while displaying the patient-matched surgical component and the representative model;
• and
• guiding the surgical procedure on the bone by displaying at least a portion of the resection plane of the surgical instrument relative to the cutting plane of the surgical protocol on the representative model.