Anti-rotational interarch orthodontic device

Abstract

An orthodontic interarch device includes a recurve bend located adjacent a shepherd's hook or loop-type attachment that makes the anterior end of the device rotate downwardly rather than upwardly when force is applied. As the person's jaws move, a cam action against the archwire is produced that does not allow the hook or loop attachment end of the device to move above the horizontal plane of the bite as the connection rotates. The recurve bend should be a minimum of 120 degrees from the longitudinal axis of the interarch device in the backward direction. As the degree of this backward curvature approaches 210 degrees, the recurve bend further positions a hook attachment pivot point below axis of the body of the interarch device in the vertical plane. This further prevents the appliance from rotating into the bite.

Dependencies are inferred from the claim text.