1. A system for calibrating a tracked shape and orientation of a body comprising: a computer navigation system; a sensing device adapted to generate a series of representations of a shape of the body; a tracking device associated with the body in a fixed relation to the body, the tracking device adapted to be detected by the computer navigation system to locate the body relative to the computer navigation system; and the computer navigation system having a central processing unit that is adapted to process the series of representations and a relative location of the body to the computer navigation system to determine the shape and orientation of the body relative to the tracking device, whereby the shape and orientation of the body is calibrated to the tracking device.