Department of Orthopedics, The First Affilated Hospital of Soochow University, Soochow, China.
Department of Orhtopedics, Qingpu Branch of Zhongshan Hospital affliated to Fudan University, Shanghai, China.
J Invest Surg. 2022 Jan;35(1):132-140. doi: 10.1080/08941939.2020.1836290. Epub 2020 Oct 22.
In this research, low modulus carbon fiber (CF)-reinforced polyetheretherketone composite plates (CF-PEEK plates) were compared with traditional metal plates using finite element analysis to establish a reference for clinical application.
Plates of stainless steel, titanium alloy (Ti6Al4V), or CF-PEEK with different carbon fiber reinforcement ratios (CF30, CF50, and CF60) were used to fix the tibial shaft comminuted fracture. The maximum stress, the maximum displacement of fracture and the stress shielding of cortex bone were analyzed.
Under 200 N axial compression, the maximum displacement was measured in the CF30 plate (4.62 mm) and the minimum in the stainless steel plate (0.23 mm). The stress shielding rates of stainless steel, titanium, CF30, CF50, and CF60 plates were 59.4%, 54.4%, 23.75%, 48.75% and 66.25%. Under 700 N axial compression, the internal fixation by the CF30 plate failed. Among the other 4 plates, the maximum displacement was measured in the CF50 plate (2.52 mm) and the minimum in the stainless steel plate (0.78 mm). The stress shielding rate of plates made of stainless steel, titanium, CF50, and CF60 were 57.1%, 52.0%, 48.1%, and 67.8%.
CF50 plates can be safely used in the tibial shaft comminuted fracture. The micromotion in the CF50 and CF60 plate was more beneficial to callus formation and fracture healing. The stress shielding of the cortex bone under the CF50 plate was the lowest. The finite element analysis indicated that the CF-PEEK material is worthy of further study because of its biomechanical advantages.
本研究通过有限元分析比较低模量碳纤维（CF）增强聚醚醚酮复合材料板（CF-PEEK 板）与传统金属板，为临床应用提供参考。
采用不锈钢、钛合金（Ti6Al4V）或不同碳纤维增强比（CF30、CF50 和 CF60）的 CF-PEEK 板固定胫骨粉碎性骨折。分析最大应力、骨折最大位移和皮质骨的应力遮挡。
在 200N 轴向压缩下，CF30 板的最大位移为 4.62mm，不锈钢板的最小位移为 0.23mm。不锈钢、钛、CF30、CF50 和 CF60 板的应力遮挡率分别为 59.4%、54.4%、23.75%、48.75%和 66.25%。在 700N 轴向压缩下，CF30 板内固定失效。在其余 4 块板中，CF50 板的最大位移为 2.52mm，不锈钢板的最小位移为 0.78mm。不锈钢、钛、CF50 和 CF60 板的应力遮挡率分别为 57.1%、52.0%、48.1%和 67.8%。
CF50 板可安全应用于胫骨粉碎性骨折。CF50 和 CF60 板的微动更有利于骨痂形成和骨折愈合。CF50 板对皮质骨的应力遮挡作用最低。有限元分析表明，CF-PEEK 材料具有生物力学优势，值得进一步研究。
