Abstract: An orthodontic bracket includes a base, a pair of substantially parallel, spaced tie wings extending from the base substantially in an occlusal-gingival direction, and an archwire slot extending through the base and the tie wings. The base has an anterior surface through which the archwire slot extends. A groove is provided in an inside surface of each tie wing located adjacent to the anterior surface of the base. A slidable locking cover has opposed side edges and is adapted to be disposed in the respective grooves in the inside surface of each tie wing. The cover is slidable along at least a part of the anterior surface of the base between an open position clear of the archwire slot and a closed position covering the archwire slot to enable the cover, in the closed position, to lock an archwire in the archwire slot.