The invention relates to a method for producing a protrusion splint (6), wherein the protrusion splint (6) has an upper contact region (7) for defined contact for an upper jaw region (2) and a lower contact region (8) for defined contact for a lower jaw region, wherein the lower jaw region is held in a position determined by the protrusion splint (6) relative to the upper jaw region when the jaw regions contact the respective contact regions (7, 8). The method comprises the following steps: fixing the jaw regions in a first position, wherein the lower jaw region (3) is shifted forwards relative to the upper jaw region (2) in the first position compared to the normal position of the jaws； creating a three-dimensional image data set (11) of an air passage (5) in the region of the trachea (5) while the jaw regions are fixed in the first position； checking the air passage on the basis of the three-dimensional image data set as to whether an opening size of the air passage in the first position corresponds to a target specification； and defining a second position of the jaw regions relative to one another on the basis of a result of the check.
