Orthodontic bracket and its tool

An orthodontic bracket adapted to engage to a tooth surface, the orthodontic bracket comprising:

• a base adapted to engage the tooth surface;
• a bracket body extending in a substantially perpendicular direction from said base, said bracket body having an arch wire slot which extends in a mesiodistal direction substantially in a center of said bracket body;
• a locking member for opening or closing said arch wire slot;
• wherein said locking member, which is structured in a substantially U-shaped cross-sectional configuration, has a base side portion located on a base side and extending along said base and a counter base side portion having substantially the same width as the length of said arch wire slot and extending on an upper side of said slot, said locking member being formed of an elastic member, a notched portion being provided substantially in a center of said counter base side portion;
• wherein said bracket body has a closing stop groove formed at an open edge portion of said arch wire slot so as to stop a tip of said locking member in a slot closed position and an open stop concavity formed at an edge portion thereof located away from said stop groove so as to stop the tip of said locking member in a slot open position, a rib being formed in a longitudinally central portion of said stop groove in such a manner as to project so as to bury said stop groove in correspondence with said notched portion.