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Finite Element Analysis Model for Assessing Expansion Patterns from Surgically Assisted Rapid Palatal Expansion
Published on: October 20, 2023
Three lateral osteotomy designs for bilateral sagittal split osteotomy: biomechanical evaluation with
Hiromasa Takahashi1, Shigeaki Moriyama, Haruhiko Furuta
1Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Fukuoka University, 7-45-1 Nanakuma, Jonan-ku, Fukuoka, Japan. hiromasatakahashi@gmail.com
Head & Face Medicine
|March 30, 2010
Summary
The Obwegeser-Dal Pont (OD) method offers superior mandibular stability in bilateral sagittal split osteotomy (BSSO) compared to other techniques. Placing miniplates along Champy's lines further enhances mechanical advantage and stability.
Area of Science:
- Orthognathic surgery
- Biomechanical analysis
- Dental implantology
Background:
- The optimal placement for lateral osteotomy in bilateral sagittal split osteotomy (BSSO) remains debated biomechanically.
- Current BSSO techniques lack a consensus on the ideal lateral osteotomy location.
Purpose of the Study:
- To compare the biomechanical stability of three lateral osteotomy designs for BSSO.
- To evaluate mandible and fixation system behavior using 3D finite element analysis (FEA).
Main Methods:
- Simulated three BSSO lateral osteotomy designs: Trauner-Obwegeser (TO), Obwegeser (Ob), and Obwegeser-Dal Pont (OD).
- Utilized 3D FEA with miniplate fixation at four locations, including Champy's lines, for 12 fixation methods.
- Applied 5 mm advancement to distal segments and analyzed under two load conditions.
Main Results:
- The OD method demonstrated significantly less tooth displacement and bone/fixation system stress compared to TO and Ob methods.
- Miniplate fixation along Champy's lines resulted in lower stress magnitudes than other locations across all methods.
Conclusions:
- The OD method provides enhanced mandibular mechanical stability in BSSO.
- Fixation along Champy's lines offers a biomechanical advantage for BSSO screw-miniplate systems.
