The present study evaluated the facial profile modifications in 15 skeletal Class III patients that were submitted to presurgical orthodontic treatment and orthognathic bimaxillary surgery stabilized with a rigid fixation. Eight of the patients have undergone to genioplastic surgery. Presurgical (T1) and late postsurgical (T2) radiographs taken apart with a minimum of 6 month interval had been used. The horizontal and vertical displacement of skeletal and soft tissue profile points were analyzed. The comparison of the cases submitted or not to a genioplastic surgery (t Test) showed no differences for the displacement of the skeletal and soft tissue points. The multiple linear regression analysis showed a significant correlation for horizontal movements of the Pg and Pgm points and for vertical movements of the Me and Mem points. A low correlation was found for the horizontal movements of Sena and A points and for Pn, Sn and Ph points. The vertical movements were more evident for the points Pg, Gn, and Me and for the A and Sena points but also showed low correlation.
Skeletal Class III; Facial Profile; Orthognathic surgery