A method is described comprising the steps of providing a first and a second medical technology representation of a jaw, recording an anatomically stable right-hand direction point A, A′ (1, 4), an anatomically stable left-hand direction point B, B′ (2, 5), and an anatomically stable induction point C, C′ (3, 6) in a palatinal position in the front tooth area or in a labial position of the upper and lower jaw in the first and second representation, and forming a geometric body with a first area (7) between the points A (1), B (2) and C′ (6) and a second area (8) between the points A′ (4), B′ (5) and C (3) in the first and second representation, and the setting in relation to each other of the first and second representation, whereby the first geometric body and the second geometric body act as a joint reference.
