The use of an inverted NiTi is indicated in those patients that have a bilateral posterior cross bites in the
mixed dentition with no more than 2 mm of cross bite, in which we need to expand the dentoalveolar
process to correct the malocclusion. This method is based upon the elasticity that the NiTi wires have and
the tendency that the arches have to return to their original position.
To apply this technique we must use O.OlS" x 0.025" or 0.019" x 0.025" rectangular NiTi
wires, to prevent the wire from turning around in the slot of the brace. Bioforce wire, from GAC, is much
easy to manipulate if sprayed with tetrafluoro ethane before placing them inverted. We must take account
that the first movement that these teeth are going to experience is a crown inclination, meaning that it is
into the teeth are going to tip first due to the compression of the periodontal fibers ; after this the alveolar
process will remodel. This is the moment in which the bodily movement will begin.