Computer-assisted tibia resection

A system for positioning a tool relative to a bone, the system comprising:

• an attachment member configured to couple with the bone;
• an adjustment mechanism configured to couple with the attachment member and having one or more portions moveable relative to the attachment member in at least two degrees of freedom of rotation, the adjustment mechanism including at least one arcuate shaped worm track configured to be driven by a worm gear, wherein the worm gear is driven by an actuator;
• a tool secured to the one or more portions of the adjustment mechanism and movable about at least two axes of rotation relative to the bone;
• a sensor configured to collect data regarding at least an angle of the tool;
• and
• a controller, communicatively coupled to the sensor, the controller configured to:
• determine a position of the bone;
• determine an orientation of the tool relative to the bone based at least in part on the data;
• and
• orient, with the adjustment mechanism, the tool relative to the bone upon the orientation of the tool, the position of the bone and the data.

A system for positioning a tool in surgery relative to a bone, the system comprising:

• an implantable device having a housing including at least a first sensor configured to collect first data regarding one or more characteristics of a bone of a patient, wherein the housing is configured for implantation in a medullary canal of the tibia;
• the tool;
• a second sensor configured to collect second data regarding at least an angle of the tool;
• an adjustment mechanism configured to orient the tool relative to the bone, the adjustment mechanism including at least one arcuate shaped worm track configured to be driven by a worm, wherein the worm is driven by an actuator;
• and
• a controller, communicatively coupled to the first sensor of the implantable device, the adjustment mechanism and the second sensor, the controller configured to:
• determine a first position of the implantable device from the first data;
• determine an orientation of a landmark of the bone based at least in part on the first data;
• determine an orientation for the tool relative to the bone based upon the second data and at least one of the orientation of the landmark and the first data;
• and
• orient the tool via the adjustment mechanism.