The invention relates to a teeth protector device (1) consisting of a rail which has a U shape or a channel shape in the cross-section, is adapted to a toothed jaw (5) of a user, and is made of a deep-drawn plastic. The rail has two plastic films (3, 4) which are laminated onto each other and between which an insert (2) is located, said insert being provided in a central front region and having a lateral extension which corresponds to multiple teeth of the user and has a width that corresponds to the distance from an approximately coverable teeth tip region to the gums. The insert (2) is a molded part made of light- or laser-cured plastic using a 3D printer.