Biomechanical study between percutaneous vertebroplasty combined with cement pedicle plasty improves vertebral biomechanical stability: A finite element analysis

医学 经皮椎体成形术 冯·米塞斯屈服准则 流离失所(心理学) 经皮 骨水泥 有限元法 生物力学 口腔正畸科 水泥 外科 椎体 解剖 材料科学 结构工程 复合材料 工程类 心理学 心理治疗师
作者
Hongtao Li,Changming Xiao,Hongyu Pan,Jing Wang,Haozhong Wang,Sen Li
出处
期刊:BMC Musculoskeletal Disorders [BioMed Central]
卷期号:25 (1)
标识
DOI:10.1186/s12891-024-07689-3
摘要

Abstract Objective To investigate the biomechanical effects of percutaneous vertebroplasty combined with cement pedicle plasty (PVCPP) on the unstable osteoporotic vertebral fractures (OVFs) through finite element (FE) analysis. The study compares the biomechanical stability of finite element models between percutaneous vertebroplasty (PVP) and percutaneous vertebroplasty combined with cement pedicle plasty. Methods Two patients with unstable OVFs underwent computed tomography (CT) examination at the thoracolumbar vertebral body levels, respectively. The CT images were reconstructed into three-dimensional finite element models to simulate stress conditions across six dimensions and to evaluate the vertebral von Mises stress before and after bone cement reinforcement. Results The study found that stress distribution differed between groups mainly at the pedicle base. In the surgical vertebral bodies, the maximum stress in the PVP group decreased during flexion and left bending, while it increased in other states. In the PVCPP group, all maximum stresses decreased. In the inferior vertebral bodies, the maximum stress in the PVP group generally increased, while it decreased in the PVCPP group. In the superior vertebral bodies, postoperatively, the maximum stress in the PVP group generally increased, while it almost remained unchanged in the PVCPP group. PVP group had higher cement stress and displacement. Conclusion PVCPP is an effective treatment method for patients with unstable OVFs. It can quickly relieve pain and enhance the stability of the three columns, thereby reducing the risk of some complications.
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