Systems and methods for measuring bone joint laxity

A system for determining bone laxity during a surgical procedure to replace at least part of a joint with an implant, the system comprising:

• a tracked probe comprising at least one probe marker, the tracked probe configured to provide an indication of at least one anatomical landmark on a bone during the surgical procedure;
• and
• a computer assisted surgical system comprising:
• a navigation system configured to track the tracked probe and at least one bone marker during the surgical procedure, and
• a processing device operably connected to the navigation system and a computer readable medium configured to store one or more instructions that, when executed, cause the processing device to:
• receive location information related to a position of the tracked probe and the at least one bone marker from the navigation system,
• pre-operatively generate a surgical plan comprising a post-operative laxity assumption based on one or more of standard gap information and statistical gap information,
• collect first motion information related to movement of the joint through a first range of motion, wherein the first motion information is collected while a first portion of the joint is in a first position with respect to a second portion of the joint,
• collect second motion information related to movement of the joint through a second range of motion, wherein the second motion information is collected while the first portion of the joint is in a second position, different from the first position, with respect to the second portion of the joint,
• determine a post-operative laxity for the joint based on a difference between the first motion information and the second motion information,
• compare the post-operative laxity for the joint and the post-operative laxity assumption to determine laxity results for the surgical procedure, and
• cause the laxity results to be displayed on a display operably connected to the processing device.