Patent ID: 8257077
Filing Date: 2012-09-04
Classification: A61C

Abstract:
1. 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; 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; several small tubes provided on an outer surface of the first sleeve, said small tubes uniformly distributed one after the other along a length of the first sleeve and have inner bores; and a spacer bar that extends parallel to the first sleeve and is guided and supported in the inner bores of the small tubes, where an end of the spacer bar that points towards the connecting piece is configured to be supported on one of the tubes upon deformation of the one of the tubes, resulting in a first extraction length of the spacer bar, or a second of the tubes upon deformation of the second of the tubes resulting in a second extraction length of the spacer bar, wherein the first extraction length is different from the second extraction length 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.