<p>The occlusion rail (2) has left and right spacers (3) that are formed to cover the left and right molar teeth (7) of the lower jaw. An arc-shaped center element (6) is extended between the left and right spacers. The center element is provided to touch the lingual cutting tooth (5) of the patient such that the incisal edge (18) is uncovered. The spacers are made of synthetic resin material. The center element is provided with an insert portion made of glass, carbon or aramid fiber.</p>
