Augmented Reality Guided Fitting, Sizing, Trialing and Balancing of Virtual Implants on the Physical Joint of a Patient for Manual and Robot Assisted Joint Replacement

A system for preparing a physical joint in a patient, the system comprising:

• at least one processor,
• a see through optical head mounted display,
• a user interface,
• wherein the system is configured to display, by the see through optical head mounted display, at least a portion of a virtual implant component onto a surface of the physical joint visible directly through the see through optical head mounted display, so as to superimpose the at least portion of the virtual implant component onto the surface of the physical joint,
• wherein the at least portion of the virtual implant component is a three-dimensional digital representation corresponding to at least a portion of a physical implant component, a placement indicator of the physical implant component, or a combination thereof,
• wherein the system is configured to superimpose and align the at least portion of the virtual implant component with at least one anatomic structure of the physical joint, and
• wherein the user interface is configured to adjust the position, orientation or position and orientation of the at least portion of the virtual implant component in relationship to the at least one anatomic structure of the physical joint.