Frontal photographic study of the face. A, B. In the comparison of pre- and postoperative images, vertical increase of the mentum caused by advancement of the mandible with clockwise rotation is noteworthy. Lower incisive alveolar osteotomy, correcting dental projection, enhances correction of the mentolabial sulcus and allows greater advancement of the mandible. Better support of the median-third of face, with vertical and transversal symmetry patterns. C, D. Frontal view of smiling patient allows observation of functionality of the lips within aesthetic patterns. The oral corridor observed in the preoperative period was completely corrected.