Computer-aided osteoplasty surgery system

A method for displaying bone-related information to guide a surgeon in removal of bone as part of a system used in computer-assisted orthopaedic surgery comprising the steps of:

• producing and displaying three-dimensional geometrical models of first and second bones, the first and second bones forming a joint;
• identifying a zone of impingement between the first bone and the second bone on at least one of the bones;
• establishing a relationship between an increase in motion of the joint and a resection depth with respect to a surface of at least one of the first and second bones that is to be removed within the zone of impingement;
• and
• generating and displaying a color map of at least one surface of at least one bone, the at least one surface being within the zone of impingement, the color snap including different colors representing different depths of bone to be removed in order to achieve an increased range of motion between the first and second bones.

A method for performing computer-assisted orthopaedic surgery comprising the steps of:

• using a device to acquire first coordinate points on a surface of a first bone;
• using the device to acquire second coordinate points on a surface of a second bone forms a joint with the first bone;
• producing and displaying a three-dimensional geometrical surface model of the first bone based on the acquired first coordinate points;
• producing and displaying a three-dimensional geometrical surface model of the second bone based on the acquired second coordinate points;
• moving the first and second bones relative to one another and detecting when the geometrical models of the first and second bones come into contact with one another in a defined zone of impingement;
• generating and displaying as a color map at least one surface of at least one bone model, the at least one surface being within the zone of impingement, the color map including different colors representing different degrees of increased range of motion between the two bones, as well as different depths of bone to be removed in order to achieve the different increased range of motions between the two bones;
• selecting one increased range of motion that is desired between the two bones;
• and
• using a tracked tool to remove bone in the zone of impingement based on real time information provided on the color map until the selected increase in range of motion is achieved as indicated when the color map reveals a target color for at least the zone of impingement.