The Schwarz Appliance is a transverse maxillary or mandibular expansion appliance, which is used mainly in deciduous dentition or mixed dentition to widen the maxillary or mandibular arches.
Maxillary Schwarz Appliance
This is a removable orthodontic appliance with acrylic contacting the palate and the lingual of the anterior teeth and the occlusal and buccal surfaces to the height of contour of the buccal of the posterior teeth. The appliance has a split down the mid palatal suture area and the two parts are joined by one or two expansion screws. The retention of the appliance is by using a number of clasps, including balls clasps, finger clasps or Adam's clasps. In certain cases an anterior labial bow may be utilized to detorque maxillary anteriors.
Mandibular Schwarz Appliance
This is a removable orthodontic appliance consisting of a lingual arch of acrylic with a split at the midline and the two parts joined by a single expansion screw. No acrylic contacting the incisal or the occlusal of the teeth. The retention of the appliance is by using balls clasps, C-clasps or Adam's clasps. Anterior labial bow is optional. Sometimes lingual lap springs (crossover wires) are utilized to help move the lower anteriors more labially.