Abstract: Medical appliance (9, 9a, 9b, 9c) for a joint (1) of a person (10), which has at least two parts (11) which are to be placed on the joint (1) and can be moved with respect to one another by the joint (1) and at least one detection device (13) for detecting a relative movement of the parts (11), wherein the medical appliance (9, 9a, 9b, 9c) comprises an evaluation device (16), having: a determination unit (17) for determining, from detection data of the detection device (13), a range of movement (5) of the joint (1), which range of movement is actually used when the medical appliance (9, 9a, 9b, 9c) is worn, a comparison unit (18) for comparing the range of movement (5) used with a desired range of movement (6), and a support unit (19) for determining support information guiding the person (10) to the most extensive use possible of the desired range of movement (6), said support information being dependent on the result of the comparison.