切除不同范围钩突后颈椎关节突的有限元对比分析.

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. [ABSTRACT FROM AUTHOR]