Abstract: Auxiliary element for the segmented distalisation of the posterior jawbone sector from canine to molar in orthodontic treatment. The element consists of two elements, a mesial segment composed of an anterior enlargement which with its inner base is fixed to the canine by means of adhesive and with its external portion facilities retention of an elastic element, an arched extension in the shoulder, finished off by a ball-and-socket member at its end which is introduced into a receptacle located in the middle portion and outside of the distal segment by its base is joined by means of adhesive to the upper molar, wherein the device can advantageously be produced from translucent or transparent materials.

Abstract: The improvements are characterised in that the ball joint of the median segment is spherical with two diametrically opposed planar faces in the positions of polar segments of the sphere and the arm of the median segment is joined to the ball joint forming a small acute angle.

Abstract: The element consists of two elements, a mesial segment composed of an anterior enlargement which with its inner base is fixed to the canine by means of adhesive and with its external portion facilitates retention of an elastic element, an arched extension in the shoulder, finished off by a ball-and-socket member at its end which is introduced into a receptacle located in the middle portion and outside of the distal segment by its base is joined by means of adhesive to the upper molar, that ball-and-socket member having a plurality of channels which facilitate its connection to a plurality of pivots in the lateral parts of the receptacle, the rotation between the two being limited by complementary projections provided in each segment, wherein the device can advantageously be produced from translucent or transparent materials.