Patent ID: 8774900
Filing Date: 2014-07-08
Classification: A61B

Abstract:
1. A method for performing computer-assisted orthopaedic surgery comprising: 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 that forms a joint with the first bone; producing and displaying a three-dimensional geometrical surface model of the first bone based at least initially on the acquired first coordinate points; producing and displaying a three-dimensional geometrical surface model of the second bone based at least initially on the acquired second coordinate points; moving by simulated or actual motion the first and second bones relative to one another and detecting maximum amplitudes of rotation between the first and second bones; identifying a zone of impingement between the first and second bones on at least one of the bones; generating and displaying a visual guide of at least one surface of at least one bone model, the at least one surface being within the zone of impingement, the visual guide representing different depths of bone to be removed in order to achieve an increased range of motion between the two bones, the visual guide indicating a distance between a current bone surface and an objective bone surface for at least one surface, the objective bone surface being the bone surface that permits a target increased range of motion between the two bones to be achieved; using a tracked tool to remove bone in the zone of impingement based on real time information provided on the visual guide and again moving by simulated or actual motion the first and second bones relative to one another and detecting maximum amplitudes of rotation between the first and second bones.