Fig. 2 “ In this case, the success of treatment depends on the correct use of intermaxillary light elastics at night. With the correct application of the 8 principles of MTB Philosophy, we can observe the development of the natural arch of the patient only with the application of light forces.” Fig. 3 He was in a good general health and had no history of major systemic disease or accidents or history of a thumb-sucking habit. His chief complaint was an open bite with crooked maxillary teeth. We observed the tongue-thrust habit at his first appointment during swallowing and conversation with the patient. The patient also complained about the esthetic smile with night breathing difficulty. The patient's face shows the characteristics of mouth breathing shown by a low and anterior tongue posi-tion. When the mouth is open, the pressure of the buccinator muscles increase making difficult to correct the crossbite and the open bite in the upper arch. From the frontal view, his face was slightly asymmetric, and the chin was deviated slightly toward the right. Treatment was planned with the CRYSTAL 3D esthetic Self Ligating Bracket System using MTB Philos-ophy. In this case, the success of treatment depends on the correct use of intermaxillary light elastics at night. With the correct application of the 8 principles of MTB Philosophy, we can observe the development of the natural arch of the patient only with the application of light forces. We can observe by the short time of treatment the improvement of the soft tissues of the face after return-ing to a proper dentoalveolar position, with correct breathing function. The patient had an Angle Class II Division 1 maloc-clusion with a 0 mm overjet and 4 mm open bite 46 Summer 2015 JAOS Fig. 4: First appointment: 1 month. Lateral incisors are almost in the correct position. Fig. 5: Second appointment : 3 months, bonding the lower arch including the second molars. 0.014 thermoactive archwire with ante-rior vertical light elastics at night, and cross elastic at night.
Journal of the American Orthodontic Society Summer 2015-Buyer's Guide: Page 46
