Abstract: An orthodontic bracket includes a base which is capable of being attached to a band that surrounds a tooth or directly to the tooth itself, and the base contains ways along which at least one insert slides. Pins fit through the base to maintain the insert in a fixed position thereon. The insert has an outwardly opening slot which receives an arch wire that extends along the row of teeth in which the tooth is located, and the arch wire is attached to the insert by small tie wires. By moving the insert relative to the base, it is possible to change the orientation of the force exerted on the tooth by the arch wire. Moreover, the bracket normally has two inserts which slide independently of each other on the base until fixed in position by the pins, and this enables the bracket to be easily converted from one configuration to another. For example, the bracket is easily changed from a large single bracket to a medium twin or to a wide twin and vice-versa.