Patent ID: 8277454

Claim:
A system for navigation-assisted shoulder operations in which the humeral component is partially replaced with a prosthesis, comprising: a first tracking unit configured to be fastened to a section of a bone that is to be removed during the operation; a detection unit configured to detect landmarks on the bone; a tracking unit fastening device comprising an elongated member, the tracking unit fastening device configured to be fastened to another section of the same bone; a cutting guide slidably arranged on the elongated member, wherein the cutting guide is alignable in a desired orientation with respect to the tracking unit fastening device; a second tracking unit detachably fastened to the elongated member; a camera unit which detects the first and second tracking unit, in order to determine respective locations of the first and second tracking unit; and a computational unit which is connected to the camera unit and is configured to: determine a first location of the landmarks on the bone relative to the first tracking unit based on i) data acquired by the camera unit and corresponding to the first tracking unit and ii) data acquired by the detection unit; and calculate a second location of the landmarks on the bone relative to the second tracking unit based on the first location and data acquired by the camera unit and corresponding to the second tracking unit such that additional navigated treatment apparatuses can be exactly positioned during the operation by referring to the second tracking unit.