Bracket

A bracket for orthodontic treatments, comprising a base member having a bottom plate to be adhered to a tooth, and first and second holding arms projecting from the bottom plate and defining a slot between one another for receiving a wire, and a leaf spring retained by the base member and comprising an essentially U-shaped arc and two essentially straight legs joining to said arc, wherein the U-shaped arc encloses the first holding arm, said leaf spring being movable at the base member between two equilibrium positions, wherein in a first of said positions of said leaf spring the slot is opened and in the other position of said leaf spring the slot is covered by a first one of said legs of the leaf spring, wherein the second one of said legs of said leaf spring comprises a free end which is immovably retained at the base member by means of a tension of said leaf spring in a defined abutment position, and said leaf spring may be brought into the second one of said positions by resiliently, partially bending open the arc of the leaf spring, in which it is retained by resiliently clamping said first leg at the first arm of the base member, and wherein the legs of said leaf spring have different lengths and extend at an angle of approximately 90.degree. to one another, a shorter one of said legs being disposed in a recess provided at a lower surface of the first arm pointing against the bottom plate, and having an end edge abutting at the bottom of the recess, a longer one of said legs together with said end edge of the shorter leg clamping the first arm in all positions of the leaf spring, the leaf spring being pivotal between the two equilibrium positions, wherein the slot can be closed by the longer leg of the leaf spring.