orthodontic appliance and more particularly to the expansion of the stationary jaw and maxillary arch of the arc

摘要

The orthodontic device comprises an apparatus for expansion mi - arc which is placed between two bands orthodontic of the prior art (3, 5) in order to carry out the development of the length of the arc between - canines and the bilateral assemblies (9, 11) consisting of a telescopic rod is subjected to the action of a spring and of a tube for the distance (molar) and the additional development of the length of the arc in the zone bicuspid the mandible and maxilla. In one embodiment of the invention, the apparatus of expansion mi - arc is an assembly comprising a lock screw connecting a bilateral palatal. Each side of the plate is fixed to a canine and to a molar with a strip orthodontic. In another embodiment of the apparatus, a plate palatal molded is divided into four sections, two sections of the prior art, and two sections of the posterior. Each front section is fixed to a canine and each rear section with a molar with a strip orthodontic. The apparatus of expansion mi - arc is placed between the two sections of the prior art and the two sections of the posterior are fixed to their respective front section of an assembly consisting of a telescopic rod is subjected to the action of a spring and of a tubing.