Finite Element Analysis of Internal Fixation in Cervical Spinous Process Fracture
Shen Yan1, Wang Chaoyang1*, Wu Rong1, Chen Bo2
1Department of Orthopedics, The PLA 98th Hospital, Huzhou 313000, Zhejiang, China; 2Department of Orthopedics Institute, Ruijin Hospital, Shanghai Jiaotong University School of Medicine,Shanghai 200025,China
Abstract：The aim of this work is to establish a three-dimensional finite element model of cervical spinous process fracture (extension into the lamina) after internal fixation and assure its availability to surgical treatment. Based on a finite element model of a normal cervical spine, a finite element model of cervical spinous process fracture (extension into the lamina) was developed according to the clinical case, with which an internal fixation therapy on fracture model was simulated. The range of motion (ROM) under flexion, extension, lateral-bending and axial rotation were measured and analyzed in the normal and fracture model and fixation model. The force loading was applied on both vertebra and internal fixation to elucidate the safety of this surgical therapy. It was shown that the finite element model of cervical spinous process fracture (extension into the lamina) had a high similarity and profile to the clinical case. The range of motion (ROM) on C7-T1 segment under each movement in fracture model (flexion+extension 9.20°, lateral-bending 5.83°, axial rotation 13.12°) was larger than that in the normal model(flexion+extension 7.11°, lateral-bending 4.92°, axial rotation 9.59°), especially in the rotation movement. The whole cervical vertebra was more stable under internal fixation (flexion+extension 4.07°, lateral-bending 2.21°, axial rotation 2.91°) with the safety of internal fixation system. In conclusion, the finite element model could be used to simulate the biomechanics of cervical spinous process fracture (extension into the lamina) to indicate the potential for delayed instability.
沈彦,王朝阳,吴荣,陈博. 有限元分析颈椎棘突骨折内固定有效性[J]. 中国生物医学工程学报, 2017, 36(4): 456-463.
Shen Yan, Wang Chaoyang, Wu Rong, Chen Bo. Finite Element Analysis of Internal Fixation in Cervical Spinous Process Fracture. Chinese Journal of Biomedical Engineering, 2017, 36(4): 456-463.
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