基于有限元的腰骶椎弓根螺钉固定与人工椎间盘置换术的比较研究

J. Biswas, Anik Banerjee, N. Mondal, Masud Rana
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引用次数: 1

摘要

目的是评价双节段半刚性椎弓根螺钉固定和人工椎间盘置换术在腰椎的生物力学性能。Ti6Al4V和CFR-PEEK材料用于椎弓根螺钉固定和人工椎间盘置换术。在本研究中,在6、8、10 Nm的力矩下,在L3-L4-L5区域之间进行椎弓根螺钉固定和人工椎间盘置换术,并比较屈曲、伸展和左右侧向弯曲时的活动范围。在腰椎L3-L4-L5进行双节段椎弓根螺钉融合术和全椎间盘置换术。碳纤维增强材料(CFR-PEEK)和超高分子量聚乙烯(UHMWPE)分别用于脊柱融合和人工椎间盘核心部分。随后,应用有限元分析,检测到与Ti6Al4V棒相比,CFR-PEEK棒能够增加植入水平的屈伸和侧向弯曲的运动范围。在人工椎间盘置换术中观察到过度活动。因此,具有CFR-PEEK的棒材料是治疗退行性疾病的更好选择是很重要的。
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A Finite Element Based Comparative Study of Lumbosacral Pedicle Screw Fixation and Artificial Disc Replacement
The aim of this is to evaluate the biomechanical performance of double-level semi-rigid pedicle screw fixation and artificial intervertebral disc replacement in lumbar spine. Ti6Al4V and CFR-PEEK material are used for pedicle screw fixation and artificial disc replacement. In the present study, pedicle screw fixation and artificial intervertebral disc replacement are carried out between L3-L4-L5 regions under the application of moment 6,8,10 Nm and range of motion is compared during flexion, extension, and right-left lateral bending. Two level pedicle screw fusion and total disc replacement are developed in the L3-L4-L5 of the lumber spine vertebrae. Carbon fiber reinforced (CFR-PEEK) and Ultra High Molecular Weight Polyethylene (UHMWPE) are considered for the spinal fusion and the core part of the artificial disc respectively. Afterwards, applying the finite element analysis, it is detected that CFR-PEEK rod is able to increase range of motion at the implanted level in comparison to Ti6Al4V rod for both flexion-extension and lateral bending. In case of artificial intervertebral disc replacement hypermobility was observed. Hence, it is significant that rod material with CFR-PEEK is a better alternative for the treatment of degenerative diseases.
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