A method for manufacturing a protrusion splint comprising an upper support area configured to provide a defined abutment of a maxilla area, and a lower support area configured to provide a defined abutment of a mandible area. The method includes fixing the maxilla area and the mandible area in a first position so that the mandible area is shifted forward relative to the mandible area. A three-dimensional image data set of an air passage in a region of a trachea is created in the first position. The air passage is checked whether an opening value of the air passage corresponds to a target value. A second position of the maxilla area and of the mandible area to each other is defined depending on the checking. The protrusion splint is manufactured so that the mandible area is held relative to the maxilla area in the second position.
