Development And Analysis Of A Three-dimensional Finite Element Model Of Human Cervicothoracic Junction (C₆-T₁)

Objective: To construct and validate an anatomic detail three-dimensional (3D) nonlinear finite element model of human cervicothoracic junction vertebrae(Compared with C6～T1). When giving pure torque load testing, observation cervicothoracic junction model of the FSU flexion, extension, Lateral bending normal range of motion and the normal stress distribution of cloud coverage to verify the validity of the model.Methods: One healthy volunteer young men were selected, and permitted by themselves Their case histories were reviewed and the patients were examined by X-ray to exclude cervicothoracic junction diseases. .Primitive DICOM image data of normal human were obtained by thin slice CT scan and reconstructed 3D surface image by Mimic10.01 data processing, Used Magic9.9 improvement the model, accordingly, the LIS format data were imported to ANSYS10.0 software to become a 3D entity .And element type and material properties were defined at the same time. The disc, facets and main cervicothoracic junction ligament were modeled according to literature. Completely model.Results: A complex three-dimensional finite element model of cervicothoracic junction was generated including bone,disc and ligaments. The appearance of the model was vivid with great geometrical similarity. The 3D reconstruction could display cervicothoracic junction independently or jointly. Any diameter of the structures reconstructed could be measured discretionarily at any angle. The results of the finite element model were matched to the results of the in vitro experiment of biomechanics. Moreover, this model could be used for various finite element mechanics analysis of cervicothoracic junction.Conclusion: The advantages of the model include intact structure, precise elements, outstanding key points and high measure accuracy. It is a convenient and precise method for physicians to establish the finite element model of the cervicothoracic junction. This method facilitates the computer study on the biomechanical behavior of the local structures of the model under various pressure conditions. Model can simulate the natural condition and facilitate the further biomechanical research..