Chinese Journal of Tissue Engineering Research ›› 2017, Vol. 21 ›› Issue (28): 4486-4492.doi: 10.3969/j.issn.2095-4344.2017.28.010

Previous Articles     Next Articles

Three-dimensional finite element study on biomechanical effects of orthognathic surgery on the temporomandibular joint of skeletal mandibular retrusion

Tian Tao1, Wang Wei2, Zheng Wei-yin1, 3, Li Yan3, Ren Kai-ge1   

  1. 1Southwest Medical University, Luzhou 646000, Sichuan Province, China; 2Urumqi DW Innovation InfoTech Co., Ltd., Urumqi 830001, Xinjiang Uygur Autonomous Region, China; 3Chengdu Military General Hospital of Chinese PLA, Chengdu 610000, Sichuan Province, China
  • Revised:2017-08-07 Online:2017-10-08 Published:2017-11-10
  • Contact: Zheng Wei-yin, Associate professor, Master’s supervisor, Associate chief physician, Southwest Medical University, Luzhou 646000, Sichuan Province, China; Chengdu Military General Hospital of Chinese PLA, Chengdu 610000, Sichuan Province, China
  • About author:Tian Tao, Studying for master’s degree, Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • Supported by:

    the Project of Chengdu Military General Hospital of Chinese PLA, No. 15QNP034

Abstract:

BACKGROUND: Generally, orthognathic surgery is used for skeletal mandibular retrusion. As the fulcrum of the masticatory loads on the temporomandibular joint, the mandible connects orthognathic surgery on itself with temporomandibular joint closely. However, the influence of orthognathic surgery on temporomandibular joint has not yet been fully unified. Finite element method has been widely used in the research concerning stomatology in recent years.
OBJECTIVE: To establish a finite element model of temporomandibular joint and mandible with masticatory muscles before and after orthognathic surgery on the mandible and to investigate the long-term influence of orthognathic surgery on the biomechanics of temporomandibular joint.
METHODS: The data of CT scan and three-dimensional reconstruction of a patient with skeletal mandibular retrusion were used to simulate surgical mandibular advancement with sagittal split ramus osteotomy, and the distance of advancement was 4, 8 and 10 mm, respectively. The Von Mises stress of the condyles and articular fossae were obtained based on finite element method. 
RESULTS AND CONCLUSION: The finite element models of temporomandibular joint and mandible with masticatory muscles before and after orthognathic surgery of the patient with skeletal mandibular retrusion were established successfully, the stress nephograms and maximum Von Mises stress in each region of the condyles and articular fossae were obtained. To conclude, the finite element models are successfully established by Mimics, Geomagic Studio, Unigraphics NX and Workbench synthetically. The standard orthognathic surgery generally does not affect the condyle and glenoid fossa of the patient with skeletal mandibular retrusion negatively in the long-term.

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程

Key words: Finite Element Analysis, Biomechanics, Tissue Engineering

CLC Number: