A DENTAL APPLIANCE (20) FOR CORRECTING TOOTH ALIGNMENT. THE APPLIANCE (20) INCLUDES A BODY (22) FOR SEATING ON AN ARCH OF TEETH. THE BODY (22) IS AT LEAST PARTIALLY ELASTICALLY DEFORMABLE AND HAS A SEATED CONDITION INTO WHICH IT IS ELASTICALLY DEFORMABLE TO BE SEATED ON AN ARCH OF TEETH. THE BODY (22) IS CONSTRUCTED, WHEN SEATED ON AN ARCH OF TEETH, FOR APPLYING, BY VIRTUE OF SAID ELASTIC DEFORMATION, A CORRECTION FORCE ON ONE OR MORE MISALIGNED TEETH, AT OR ADJACENT A BASE OF THE CROWN OF EACH MISALIGNED TOOTH, IN A DIRECTION IN WHICH EACH MISALIGNED TOOTH IS TO BE MOVED TO CORRECT ITS ALIGNMENT. FIG. 2