Department of Orthopaedics, The Second Affiliated Hospital of XuZhou Medical University, Xuzhou, 221000, China.
Graduate School of Xuzhou Medical University, Xuzhou, 221000, China.
BMC Musculoskelet Disord. 2024 Sep 2;25(1):697. doi: 10.1186/s12891-024-07830-2.
There is currently a lack of in-depth comparative evaluation regarding the biomechanical properties of novel intramedullary nail devices in the treatment of basal femoral neck fractures (BFNF). This study aims to utilize finite element analysis to compare the performance differences of two novel devices with traditional PFNA and InterTan nails in the fixation of BFNF.
Based on a validated finite element model, this study constructed an accurate BFNF model and implanted four different intramedullary nail devices: PFNA, InterTan nail, PFBN (proximal femoral biomimetic nail), and NIS (novel intramedullary system). Under a vertical load of 2100N, the displacement and Von Mises stress (VMS) distribution of each group of models were evaluated through simulation testing.
Under a load of 2100N, the PFBN device exhibited the best performance in terms of displacement and peak stress, while PFNA performed poorly. The peak displacement of the NIS device was lower than that of PFNA and InterTan nails, while the peak stress of the InterTan nail was lower than that of PFNA and NIS.
The PFBN device demonstrates stronger load-bearing and shear-resistant properties in the treatment of BFNF, and the NIS device also shows significant improvement in stability. Therefore, both the PFBN and NIS devices are reliable internal fixation techniques for the treatment of CFIFs, with potential clinical application prospects.
目前缺乏对新型髓内钉装置治疗股骨颈基底部骨折（BFNF）的生物力学性能的深入比较评估。本研究旨在利用有限元分析比较两种新型装置与传统 PFNA 和 InterTan 钉治疗 BFNF 的固定效果差异。
本研究基于验证的有限元模型构建了一个准确的 BFNF 模型，并植入了四种不同的髓内钉装置：PFNA、InterTan 钉、PFBN（股骨近端仿生钉）和 NIS（新型髓内系统）。在 2100N 的垂直载荷下，通过模拟测试评估每组模型的位移和 Von Mises 应力（VMS）分布。
在 2100N 的载荷下，PFBN 装置在位移和峰值应力方面表现最佳，而 PFNA 表现不佳。NIS 装置的峰值位移低于 PFNA 和 InterTan 钉，而 InterTan 钉的峰值应力低于 PFNA 和 NIS。
PFBN 装置在治疗 BFNF 时具有更强的承载和抗剪切性能，NIS 装置在稳定性方面也有显著改善。因此，PFBN 和 NIS 装置都是治疗 CFIFs 的可靠内固定技术，具有潜在的临床应用前景。
