Surgical Correction of Mandibular Asymmetry by Unilateral Sagittal Split Ramus Osteotomy Combined with Contra-Lateral Vertical Ramus Osteotomy

In the surgical correction of mandibular deformities by mandibular retrusion, there is little difference in usefullness between sagittal split and vertical ramus osteotomies.However, vertical ramus osteotomy causes less rotational displcement of the proximal segment in asymmetric retrusion. Sagittal split ramus osteotomy is easier in the intraoral rigid internal fixation.Then unilateral sagittal split ramus osteotomy combined with contralateral intraoral vertical ramus osteotomy was done with these advantages for the surgical correction of mandibular asymmetry.The intermaxillary fixation between 1 and 2 weeks was sufficient in these osteotomies and good postoperative stability was naturally observed.The many preoperative symptoms and signs of temporomandibular joints were also improved after the correction of mandibular asymmetry by this technique. Never new symptoms of temporomandibular joints were observed following the treatment by this technique.