Abstract: The element is adapted to be fitted as an annular band around a tooth and to be secured to a dental appliance to hold the same in position. The fixing element comprises a strip metal element having two end portions, which are adapted to overlap in said annular band, two slide-snap fastener parts which are respectively carried by said end portions and selectively interengageable in a plurality of positions which determine respective diameters of said annular band, and one of the fastener parts including a bracket which is provided with a longitudinal groove for slidably receiving an orthodontic appliance. The bracket carries a clamping device which projects over the longitudinal groove, and is selectively and angularly movable to positions for slidable and clamping engagement with the orthodontic appliance received in the longitudinal groove.

Abstract: This invention relates to an orthodontic appliance for correcting the positions of teeth in a jaw. Embodiments of the invention are provided with a low pull and/or a high pull and comprise adjustable spring or rubber elements for transmitting the correcting forces to the teeth. The spring or rubber elements are disposed on the outside of the mouth closely beside the teeth so that the latter are not subjected to disturbing turning and tilting torques. Turning movements of the head and movements of the jaw are compensated. A combination of a high pull and a low pull enables an optimum adjustment of the magnitude and direction of the correcting forces.