Department of Orthopedics, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, 17 Lujiang Road, Hefei, 230000, People's Republic of China.
Beijing Engineering and Technology Research Center for Medical Endoplant, Beijing, 100000, People's Republic of China.
BMC Musculoskelet Disord. 2024 Aug 31;25(1):691. doi: 10.1186/s12891-024-07816-0.
This study used finite element analysis (FEA) to compare the biomechanical stability of bispherical metal augment (BA) and wedge-shaped trabecular-metal augment (TA) in different acetabular defect reconstruction models, thereby explaining the application value of this novel bispherical augment in complex hip revision.
Three different acetabular defect pelvis models originating from three representative patients with different types of severe acetabular defects (Paprosky IIC, IIIA, and IIIB) were constructed and reconstruction with BA and TA technique was simulated. Based on the FEA models, the displacement of reconstruction implants, relative displacement of bone implants, and hemi-pelvic von Mises stress were investigated under static loads.
BA acquired smaller reconstruction system displacement, less relative displacement of bone implants, and lower pelvic von Mises stress than TA in all Paprosky IIC, IIIA, and IIIB defect reconstructions.
The FEA results show that BA could acquire favourable biomechanical stability in severe acetabular defect reconstruction. This technique is a reliable method in complex hip revision.
本研究采用有限元分析（FEA）比较双凸面金属增强物（BA）和楔形小梁金属增强物（TA）在不同髋臼缺损重建模型中的生物力学稳定性，从而解释这种新型双凸面增强物在复杂髋关节翻修中的应用价值。
构建了源自 3 例不同严重髋臼缺陷（Paprosky IIIC、IIIA 和 IIIB）患者的 3 种不同髋臼缺损骨盆模型，并对 BA 和 TA 技术进行了模拟。基于 FEA 模型，在静态载荷下研究了重建植入物的位移、骨植入物的相对位移和半骨盆 von Mises 应力。
在所有 Paprosky IIIC、IIIA 和 IIIB 缺损重建中，BA 获得的重建系统位移较小，骨植入物的相对位移较小，骨盆 von Mises 应力也较低。
FEA 结果表明，BA 可在严重髋臼缺陷重建中获得良好的生物力学稳定性。该技术是复杂髋关节翻修的可靠方法。
