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Updated: May 9, 2026
Adjustable Stiffness, External Fixator for the Rat Femur Osteotomy and Segmental Bone Defect Models
Published on: October 9, 2014
[The establishment of digital model about sagittal split ramus osteotomy and stability analysis of 3 different
Xue-min Yin1, Jun-wei Zhang, Xiao-xu Ren
1Department of Oral and Maxillofacial Surgery, Southern Medical University, Guangzhou, China. yinxm@fimmu.com
Purpose:
To establish the digital model about sagittal split ramus osteotomy and discuss the stress and displacement of 3 different fixation methods.
Methods:
Three-dimensional reconstruction software Mimics and Geomagic were used to establish the three-dimensional entity model of mandible, and simulated sagittal split ramus osteotomy and fixation. Three-dimensional finite element model was established by mesh generation through ANSYS. After boundary constraint the occlusal load of 132N on the bilateral lower first molars was applied.
Results:
Three-dimensional finite element models of sagittal split ramus osteotomy and 3 different fixation methods were established, and the biomechanical character of stress and displacement after occlusal load preoperatively and after splitting mandibles were found.
Conclusions:
As the stress distribution tends to uniformity and the displacement at split area is the least one, the fixation by bicortical screws in inverted-L position after sagittal split ramus osteotomy is the stablest of the 3 fixation methods. Supported by Natural Science Foundation of Guangdong Province (S2011010003872) and Science and Technology Projects of Guangzhou City (7421165457455).
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