International Journal of Oral & Maxillofacial Surgery
Volume 39, Issue 5 , Pages 457-462, May 2010

Virtual occlusion in planning orthognathic surgical procedures

  • N. Nadjmi

      Affiliations

    • Cranio-Maxillofacial Unit, Eeuwfeestkliniek, Antwerp, Belgium
    • Corresponding Author InformationAddress: Nasser Nadjmi, Cranio-Maxillofacial Unit, Eeuwfeestkliniek, Harmoniestraat 68, B-2018 Antwerp, Belgium. Tel.: +32 3 240 26 11; fax: +32 3 238 04 89.
  • ,
  • W. Mollemans

      Affiliations

    • Medical Image Computing, Faculties of Medicine and Engineering, University Hospital Gasthuisberg, Leuven, Belgium
  • ,
  • A. Daelemans

      Affiliations

    • Cranio-Maxillofacial Unit, Eeuwfeestkliniek, Antwerp, Belgium
  • ,
  • G. Van Hemelen

      Affiliations

    • Cranio-Maxillofacial Unit, Eeuwfeestkliniek, Antwerp, Belgium
  • ,
  • F. Schutyser

      Affiliations

    • Medical Image Computing, Faculties of Medicine and Engineering, University Hospital Gasthuisberg, Leuven, Belgium
  • ,
  • S. Bergé

      Affiliations

    • Department of Oral and Maxillofacial Surgery, Radboud University Nijmegen, Medical Centre, Nijmegen, The Netherlands

Accepted 1 February 2010. published online 12 March 2010.

Abstract 

Accurate preoperative planning is mandatory for orthognathic surgery. One of the most important aims of this planning process is obtaining good postoperative dental occlusion. Recently, 3D image-based planning systems have been introduced that enable a surgeon to define different osteotomy planes preoperatively and to assess the result of moving different bone fragments in a 3D virtual environment, even for soft tissue simulation of the face. Although the use of these systems is becoming more accepted in orthognathic surgery, few solutions have been proposed for determining optimal occlusion in the 3D planning process. In this study, a 3D virtual occlusion tool is presented that calculates a realistic interaction between upper and lower dentitions. It enables the surgeon to obtain an optimal and physically possible occlusion easily. A validation study, including 11 patient data sets, demonstrates that the differences between manually and virtually defined occlusions are small, therefore the presented system can be used in clinical practice.

Keywords: virtual surgery, 3D planning, occlusion, orthognathic surgery

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PII: S0901-5027(10)00045-7

doi:10.1016/j.ijom.2010.02.002

International Journal of Oral & Maxillofacial Surgery
Volume 39, Issue 5 , Pages 457-462, May 2010