Abstract: An improved orthodontic appliance of the twin bracket edgewise type in which a pair of spaced apart brackets are affixed to a pad member adapted for attachment to the surface of a tooth, each of the brackets including a base portion resting against the pad member, upper and lower wing portions projecting outwardly from the base portion and an outwardly opening slot of predetermined height between the upper and lower wing portions for receiving an arch wire in cooperation therewith, the height of the arch wire receiving slot of one of the brackets being greater than the arch wire receiving slot of the other.

Abstract: An orthodontic bracket for receiving at least one arch wire may comprise: a base portion adapted for attachment to the outer surface of a tooth and first and second wing portions propecting outwardly from the base portion. Disposed between the two wing portions and opening away from the base portion is a channel for receiving an arch wire. At least one of the channel walls is stepped so as to form two slots of differing widths.