Patent ID: 8257078

Claim:
An orthodontic corrective appliance, for correcting malpositioned molars, comprising: a supporting device comprised of an anchor screw configured to be screwed into a given jaw, one end of the appliance being mounted on the supporting device, and any other end being configured to be applied to a given molar with spring loading; a first sleeve; a pusher element guided axially in the first sleeve; and a compression spring arranged to act on the pusher element; wherein a free end of the pusher element extends from the first sleeve; a connecting piece provided at the free end of the pusher element, the connecting piece being applied to the supporting device; a second sleeve installed on an outer surface of the first sleeve, the second sleeve having inner bores; and a spacer bar, which extends parallel to the second sleeve; wherein the inner bores of the second sleeve guide and support the space bar; wherein, depending on a required extraction length of the spacer bar, which has toothing that extends over a portion of a length of the spacer bar, an end of the spacer bar that is directed towards the connecting piece is supported on at least one notch of the second sleeve by the toothing; and where an end of the spacer bar that faces away from the connecting piece is configured to be supported on a transpalatal arch or a lock element.