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This research explored how different tibial slope (TS) and tibial tunnel angle (TTA) settings impact the tibial tunnel phenomenon in posterior cruciate ligament (PCL) reconstruction using 3D finite element analysis (FEA). Models derived from CT scans of a healthy male recruiter were utilized. Tibial bone tunnels and PCL grafts were designed using SolidWorks with various tunnel angles (60°, 45°, 30°). Anterior wedge high tibial osteotomy (AW-HTO) was conducted to assess the effects of different TS angles (−4°, −8°, native, +8°, +4°). Finite element analysis (FEA) was conducted using specialized software. In each TS model, the maximum equivalent Von Mises stress (VMS) in PCL grafts diminished with an increase in TTA. Similarly, in each TTA model, the maximum VMS in PCL grafts reduced as the TS angle increased. Increasing both TTA and TS decreased the area of “high-contact stress” at the tibial tunnel (stress exceeding 10 MPa), potentially reducing stress at the “killer turn” during PCL reconstruction.

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Biomechanical Analysis of the Effect of Tibial Slope and Tibial Tunnel Angle on the Tibial Tunnel During Posterior Cruciate Ligament Reconstruction

  • 会议论文

  • 发表日期：

    2025年

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  • Fan Yang,
  • Takuji Yokoe,
  • Koki Ouchi,
  • Takuya Tajima,
  • Etsuo Chosa

摘要

This research explored how different tibial slope (TS) and tibial tunnel angle (TTA) settings impact the tibial tunnel phenomenon in posterior cruciate ligament (PCL) reconstruction using 3D finite element analysis (FEA). Models derived from CT scans of a healthy male recruiter were utilized. Tibial bone tunnels and PCL grafts were designed using SolidWorks with various tunnel angles (60°, 45°, 30°). Anterior wedge high tibial osteotomy (AW-HTO) was conducted to assess the effects of different TS angles (−4°, −8°, native, +8°, +4°). Finite element analysis (FEA) was conducted using specialized software. In each TS model, the maximum equivalent Von Mises stress (VMS) in PCL grafts diminished with an increase in TTA. Similarly, in each TTA model, the maximum VMS in PCL grafts reduced as the TS angle increased. Increasing both TTA and TS decreased the area of “high-contact stress” at the tibial tunnel (stress exceeding 10 MPa), potentially reducing stress at the “killer turn” during PCL reconstruction.