title: Proximal segment positioning with high oblique sagittal split osteotomy: indications and limits of intraoperative mobile cone-beam computerized tomography.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the indications and limits for intraoperative proximal segment positioning control by mobile cone-beam computerized tomography (CBCT).
  
  
  METHODS
  For mandible osteotomy in orthognathic surgery, the high oblique sagittal split osteotomy (HSSO) is our standard procedure. In 22 patients, positioning control of the proximal segment was performed during and after surgery to check this alternative osteotomy technique.
  
  
  RESULTS
  The mean intercondylar distance increased 0.31 mm in all patients. No significant change of the condyle positions was found in the axial and coronal planes. In the sagittal plane a significant change was found. In 1 case, revision was required because of a lateral shifting of the condyles.
  
  
  CONCLUSIONS
  Intraoperative positioning control with CBCT is an effective and reliable method to avoid condyle malpositions. Only minor position changes occur when using HSSO in orthognathic surgery, without compromising temporomandibular joint function postoperatively.
authors: Department of Oral and Maxillofacial Surgery, University Hospital Heidelberg, Germany. robin.seeberger@med.uni-heidelberg.de
authors: Robin
authors: R
authors: Seeberger
authors: Oliver C
authors: OC
authors: Thiele
authors: Christian
authors: C
authors: Mertens
authors: Juergen
authors: J
authors: Hoffmann
authors: Michael
authors: M
authors: Engel
mesh_terms: D054893:Cone-Beam Computed Tomography / Q000379:methods*; D006801:Humans; D008313:Malocclusion, Angle Class III / Q000000981:diagnostic imaging / Q000601:surgery*; D008335:Mandibular Condyle / Q000000981:diagnostic imaging / Q000601:surgery*; D056948:Orthognathic Surgical Procedures / Q000295:instrumentation / Q000379:methods*; D059229:Osteotomy, Sagittal Split Ramus / Q000295:instrumentation / Q000379:methods*