2023, Vol. 27 ›› Issue (18): 2789-2796
Comparative finite element analysis of the cervical articular process after resection of different ranges of the uncinate processes
Hao Yunteng1, Shi Jun2, Liu Yuhang1, Li Kun3, 4, Ma Yuan4, Zhang Shaojie3, 4, Wang Chaoqun5, Chen Jie3, Zhang Zhifeng6, Zheng Leigang7, Wang Xing3, 4, Li Zhijun3, 4
1Graduate School of Inner Mongolia Medical University, Hohhot 010110, Inner Mongolia Autonomous Region, China; 2Department of Physiology, 3Department of Anatomy, School of Basic Medicine, Inner Mongolia Medical University, Hohhot 010110, Inner Mongolia Autonomous Region, China; 4Center for Digital Medicine, Inner Mongolia Medical University, Hohhot 010059, Inner Mongolia Autonomous Region, China; 5Department of Imaging, Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, Inner Mongolia Autonomous Region, China; 6Department of Joint, Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010000, Inner Mongolia Autonomous Region, China; 7Department of Orthopedics and Traumatology, Inner Mongolia Autonomous Region Hospital of Traditional Chinese Medicine, Hohhot 010020, Inner Mongolia Autonomous Region, China
Abstract: BACKGROUND: Uncinate processes hyperplasia often leads to cervical spondylosis. Uncinate process resection without internal fixation is of great significance, but there are still many problems.
OBJECTIVE: To establish a three-dimensional finite element model of the whole cervical vertebrae (C0-T1), and to explore the characteristics and laws of stress change after excising different ranges of the uncinate process, so as to provide a theoretical basis for the surgical treatment of clinical cervical spondylosis.
METHODS: Raw data were obtained from spiral CT thin-section scans of 40-year-old male normal adult volunteers. Mimics, GeomagicStudio, Hypermesh, Abaqus and other software technologies were used to establish (C0-T1) full cervical three-dimensional finite element model. Models of 50% unilateral uncinate processes excision, 100% unilateral uncinate processes excision and 100% bilateral uncinate processes excision were constructed on the C5 vertebral body. After loading the same torque, six working conditions of flexion, extension, lateral flexion and rotation were assigned to observe changes of stress and displacement of the cervical facet joint in different states after the resection of the uncinate process.
RESULTS AND CONCLUSION: (1) By constructing the finite element model of the normal cervical vertebrae and the uncinate process in different ranges, after loading the same torque, the stress concentration area of the cervical articular process was now moved up from C6 in the normal group to C5 in the different ranges of uncinate process excision groups. The stress of the nodal process increased with the increase of the vertebral sequence. (2) The stress concentration areas were located at C5 and C6, and the overall shape was sharp. The degree of resection of the uncinate process reduced the stability of the cervical spine, and the degree of reduction increased with the extent of resection.
Key words: finite element, uncinate process, whole cervical spine, biomechanics, uncinate joint, articular process, anatomical structure