Electromyographic Muscular Activity Improvement in Class II Patients Treated with the Pre-Orthodontic Trainer

The efficiency of the functional appliances on craniofacial growth modification is still under controversy. Some reports suggest that functional appliances can stimulate mandibular growth while others deny such effect. Studies investigating on the efficiency of the functional appliances have failed to demonstrate there is mandibular growth. However, treatment with  functional appliances should modify muscular activity in order to improve mandibular posture. In that context, the literature is lacking on studies evaluating changes in the muscles holding the mandible and performing the mandibular movements when evaluating functional appliances’ efficiency.