Three-dimensional finite element study on biomechanical effects of orthognathic surgery on the temporomandibular joint of skeletal mandibular retrusion
10.3969/j.issn.2095-4344.2017.28.010
- VernacularTitle:正颌手术对骨性下颌后缩颞下颌关节生物力学影响的三维有限元研究
- Author:
Tao TIAN
1
;
Wei WANG
;
yin Wei ZHENG
;
Yan LI
;
ge Kai REN
Author Information
1. 西南医科大学
- From:
Chinese Journal of Tissue Engineering Research
2017;21(28):4486-4492
- CountryChina
- Language:Chinese
-
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.
