Biomechanical effects of different distributions of bone cement on osteoporotic vertebral compression fractures: a three-dimensional finite element analysis(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2022年第6期
- Page:
- 771-777
- Research Field:
- 生物材料与力学
- Publishing date:
Info
- Title:
- Biomechanical effects of different distributions of bone cement on osteoporotic vertebral compression fractures: a three-dimensional finite element analysis
- Author(s):
- CAI Ming1; QI Ying2; LIU Su1; MA Pengpeng1; ZHANG Xin1; ZHANG Chunling1; ZONG Zhiguo1; LI Wei1; ZHANG Zhimin1
- 1. Department Orthopeadic Surgery, the First Affiliated Hospital of Hebei North University, Zhangjiakou 075000, China 2. Department of Blood Transfusion, the First Affiliated Hospital of Hebei North University, Zhangjiakou 075000, China
- Keywords:
- vertebroplasty finite element osteoporosis vertebral compression fracture
- PACS:
- R318
- DOI:
- DOI:10.3969/j.issn.1005-202X.2022.06.019
- Abstract:
- Abstract: Objective In percutaneous vertebroplasty (PVP) for osteoporotic vertebral compression fractures (OVCFs), the inadequate and asymmetrical distributions of bone cement in the affected vertebra will affect surgical effect and long-term symptoms. The effects of the distribution of bone cement in the vertebra on the stress of the affected vertebra after PVP are analyzed in the study. Methods The finite element model of T12-L2 vertebral body was established using the CT data of the vertebral body of a volunteer. The OVCFs of L1 vertebral body was simulated, and then PVP was carried out. The bone cement column was injected into L1 vertebral body, and there are 3 distribution patterns of bone cement, namely inadequate distribution group, well-distribution group, and asymmetrical distribution (including the upper and lower distributions) group. The biomechanical effects of movements in different directions on L1 vertebral body after surgery were analyzed. Results Compared with the stress of osteoporotic L1 vertebral body, the maximum stress of postoperative L1 vertebral cancellous bone was mainly concentrated at the cancellous bone around bone cement, while the distribution of maximum stress of cortical bone remain unchanged. Compared with those in well-distribution group, the maximum stress and maximum displacement of L1 vertebral cancellous bone and cortical bone in inadequate distribution group were significantly increased, while the maximum stress of cancellous bone in the asymmetrical distribution group was significantly increased. Similar results could be obtained under all loading conditions in different directions. Conclusion In PVP for OVCFs, inadequate distribution of vertebral cement will lead to significantly increased maximum displacement of the vertebral body after surgery, resulting in unrelieved postoperative pain. Inadequate and asymmetrical distributions of the diseased vertebrae cement will significantly increase the maximum stress of the diseased vertebral cortical bone and cancellous bone after surgery, so it is easy to cause the re-fracture of the diseased vertebra after surgery.
Last Update: 2022-06-27