Systems and methods for intra-operative pelvic registration

A computerized method of intra-operatively registering patient data associated with a first bone with a computer model of the first bone in a coordinate system, the first bone comprising a concave portion and forming a joint with a second bone comprising a convex portion, the computerized method comprising:

• a) receiving first data points of the patient data from first intra-operatively collected points on an articular surface of the concave portion of the first bone, the first data points collected with a tracking device of a navigation system;
• b) receiving a second data point of the patient data from a second intra-operatively collected point on the first bone, the second data point collected with the tracking device, the second data point corresponding in location to a second virtual data point on the computer model;
• c) determining an intra-operative center of rotation of the first bone from the first data points;
• d) locationally matching the intra-operative center of rotation with a virtual center of rotation of the computer model in the coordinate system;
• and
• e) comparing a first distance between the virtual center of rotation and the second virtual data point and a second distance between the intra-operative center of rotation and the second data point.