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This appliance is used to treat Class III patients with skeletal midfacial deficiencies. An alternative to facemask treatment the maxillary component is fixed using a Nance or maxillary expander with soldered buccal arms for traction.

The mandibular appliance is removable. It consists of a retainer with clasps, posterior occlusial coverage and headgear tubs. A .045 facebow with hooks for elastics connects with the headgear tubes.

Elastic traction from the facebow to the buccal arms of the maxillary appliance provides the protraction force to the maxilla. Recommended wearing schedule is a minimum of 10-12 hours per day including while sleeping.