ORIGINAL RESEARCH article
Front. Bioeng. Biotechnol.
Sec. Biomechanics
Volume 13 - 2025 | doi: 10.3389/fbioe.2025.1579842
Biomechanical evaluation of the triangular support structure of the Proximal Femoral Bionic Nail compared to conventional long intramedullary nails for subtrochanteric fractures
Provisionally accepted
- 1Third Hospital of Hebei Medical University, Shijiazhuang, China
- 2Hebei Chest Hospital, Shijiazhuang, Hebei Province, China
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The aim of this study was to compare the biomechanical results of long proximal femoral bionic nail (PFBN) and three conventional intramedullary nails in the treatment of subtrochanteric fractures (STFs). Methods: Using finite element analysis, we compared the therapeutic efficacy of four long intramedullary nails: the PFBN, reconstruction nail (RCN), InterTAN nail (ITN), and proximal femoral nail antirotation (PFNA) for the treatment of Seinsheimer type IIIA and type V STFs. The biomechanical stability of the implants was evaluated by calculating of von Mises stress (VMS), contact pressure and displacement for three loading scenarios.The results showed that the PFBN group had the lowest VMS values under axial, bending and torsional loads. Under axial loading conditions, the VMS of PFBN was 480.04 MPa, followed by ITN (726.39 MPa), PFNA (730.48 MPa), and RCN (837.24 MPa) in the type V fracture groups. In the PFBN group, the contact pressure was 19.22 MPa and the tangential micromotion was 0.089 mm for the type IIIA group, 23.69 MPa and 0.08 mm for the type V group. Compared to the ITN, PFNA and RCN groups, the PFBN group exhibited the lowest contact pressure and tangential micromotion at the fracture sites.The superior biomechanical properties of the PFBN under axial, bending, and torsional loads not only reduced stress at the fracture site, but also improved structural stability.
Keywords: Biomechanics, Finite Element Analysis, Subtrochanteric fracture, Proximal femoral bionic nail, triangular support structure
Received: 19 Feb 2025; Accepted: 21 May 2025.
Copyright: © 2025 Yang, Wu, Cheng, He, Chen, Zhang and Zhang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Yingze Zhang, Third Hospital of Hebei Medical University, Shijiazhuang, China
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