Abstract: A bracket for orthodontic use has a base plate, a tie wing and an arch wire fitting slot. More specifically, a pair of tie wings having a pair of long and short wing pieces, i.e., a long piece and a short piece, are erected on the rectangular base plate and spaced apart, and the arch wire fitting slot is formed by the spaced apart portion. A pair of wing pieces of the tie wing are provided to project in the vertical direction with distal ends directed downward, and constituted the wing pieces include a long piece and a short piece. A recessed guide groove is provided in a vicinity of an end of the long piece.

Abstract: A teeth straightening bracket comprises a base plate, a wire support disposed on the base plate, and a wire passage groove formed in the wire support for causing a correcting wire to pass therethrough under sliding movement. At least one of pair of engaging fingers for a binding wire is disposed on both sides of the wire support excepting for both longitudinal ends thereof. Further engaging fingers are preferably disposed on both longitudinal ends of the wire support in perpendicular to the longitudinal direction.

Abstract: In an orthodontic appliance comprising a plurality of brackets for correcting misaligned teeth, each secured to a surface of a tooth and a wire for connecting the plurality of brackets to each other in the direction of a set of teeth, each bracket comprises a substrate to be attached at its one surface to the tooth surface and at least one wire support disposed on the other surface of the substrate and defining a groove recessed therein for passing the wire slidably along the direction of the set of teeth, in which the inner wall surface of the recessed groove is inwardly protruded convexly as a curved surface relative to the direction of passing the wire. An operation period required for correcting misaligned teeth can be shortened remarkably since the teeth can move smoothly owing to the reduced friction between the wire and the groove of the bracket.