Chinese Journal of Tissue Engineering Research ›› 2015, Vol. 19 ›› Issue (42): 6730-6734.doi: 10.3969/j.issn.2095-4344.2015.42.002

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Establishing a finite element model of the mandible containing the temporomandibular joint after bilateral-sagitta-split-ramus-osteotomy with internal fixation

Ma Wen1, Hou Min2, Song Da-li2, Yang Jing-wen1, Dai Zhi1, Cheng Jia-long1, Chai Guo-liang3, Zhou Wei-yuan4, Zhang Rui-ze5   

  1. 1Tianjin Medical University, Tianjin 300070, China; 2Tianjin Stomatological Hospital, Tianjin 300041, China; 3Jixian County People’s Hospital, Tianjin 301900, China; 4Tianjin University, Tianjin 300072, China; 5Sichuan Province Forestry Center Hospital, Chengdu 610010, Sichuan Province, China
  • Online:2015-10-08 Published:2015-10-08
  • Contact: Hou Min, M.D., Master’s supervisor, Tianjin Stomatological Hospital, Tianjin 300041, China
  • About author:Ma Wen, Studying for master’s degree, Tianjin Medical University, Tianjin 300070, China
  • Supported by:

    the Project of Tianjin Health Department, No. 2013KR11

Abstract:

BACKGROUND: Bilateral-sagitta-split-ramus-osteotomy (BSSRO) has become a conventional method to correct facial deformities, and the finite element method is a significant way to study biomechanics of the mandible and temporomandibular joint (TMJ) after BSSRO.

OBJECTIVE: To establish a precise and high simulation model of mandible containing TMJ after BSSRO with internal fixation, which is the base to study the biomechanics of the mandible and TMJ after BSSRO.
METHODS: Spiral CT scan was used to get the data of DICOM that were input into MIMICS to establish the three-dimensional model of the mandible. The three-dimensional model was wrapped into a single closed shell for mesh generation and conversion in ANSYS. Then, the model was input into the ANSYS software for temporomandibular joint reconstruction and simulation of BSSRO and internal fixation.
RESULTS AND CONCLUSION: The three-dimensional finite element model of mandible containing TMJ after BSSRO was established using MIMICS and ANSYS. This model had biological similarity and geometric similarity in comparison with the human tissues. The model could undergo various internal fixations through antedisplacement, retroposition and rotational movement of the distal end. Based on different experimental purposes, the established model can apply a load to all parts to study changes in stress and displacement of different tissues after BSSRO and internal fixation, and it also can be used to study the effect of different fixation materials on the rear stability after internal fixation.

Key words: Mandible, Temporomandibular Joint, Osteotomy, Finite Element Analysis, Tissue Engineering