Stability of skeletal class III malocclusion after combined maxillary and mandibular procedures: rigid internal fixation versus wire osteosynthesis of the mandible

Correction of Mandibular Prognathism in Combination with Polydiastema Using Rectangular Body Ostectomy: Literature Review and Case Report

“…Additionally, Politi et al analyzed skeletal stability after correction of skeletal class III malocclusion in relation to the type of fixation used to stabilize the mandible. This study showed that there were no differences between rigid fixation and wire osteosynthesis [18]. In addition to amount of mandibular setback, skeletal relapse in postoperative healing period is also important.…”

Stability Factors After Double-Jaw Surgery in Class III Malocclusion

“…Seven articles 23,25,[27][28][29]32,35 showed correction of the sagittal intermaxillary relationships after surgery and follow-up. Only two studies 23,27 considered skeletal Class III patients with a long face, increased intermaxillary angle, and anterior open bite; after the longest follow-up period these articles showed an improvement in the values for facial divergence, a reduced lower anterior facial height, and an increased lower posterior facial height.…”

“…Only two studies 23,27 considered skeletal Class III patients with a long face, increased intermaxillary angle, and anterior open bite; after the longest follow-up period these articles showed an improvement in the values for facial divergence, a reduced lower anterior facial height, and an increased lower posterior facial height. In seven papers 22,25,[27][28][29]32,35 presurgical OVJ value was negative and it appeared positive after the longest follow-up period; in one article 23 OVJ value increased after 12 months of follow-up, but it resulted still negative. OVB value was corrected in the four studies 22,23,25,27 in which it was negative before surgery, while it was improved in the other four articles 28,29,32,35 where it had a small but positive value before surgery.…”

“…In seven papers 22,25,[27][28][29]32,35 presurgical OVJ value was negative and it appeared positive after the longest follow-up period; in one article 23 OVJ value increased after 12 months of follow-up, but it resulted still negative. OVB value was corrected in the four studies 22,23,25,27 in which it was negative before surgery, while it was improved in the other four articles 28,29,32,35 where it had a small but positive value before surgery. Only two studies 24,30 declared the success rate of bimaxillary surgery in Class III malocclusion; a Ͼ90% success rate was reported in one article, 24 and an 80% rate in the second article.…”

“…33 The data indicated also that double-jaw surgery improved vertical stability of the maxilla, when it was to be moved down at surgery. 22,24,30 Factors accounting for mandibular relapse were several: the degree of intraoperative clockwise rotation of the mandibular proximal segment, 21,32 the amount of mandibular setback (measured at Pg, 28,32 Go, 22,32 B-point, and Ar-B length 33 ) and the excessive posterior condylar displacement in the glenoid cavity. 26,31 One of the common factors was the altered orientation and stretching of the pterygomasseteric sling that exerted an upward and forward force at the gonial angle accounting for mandibular relapse.…”