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Table 3 The average von Mises stress and stiffness in each region and reduced percentage in CTT and LBT

From: Biomechanical analysis of fibular graft techniques for nontraumatic osteonecrosis of the femoral head: a finite element analysis

  Stress (Mpa) Stiffness (N/mm)
WB CFH FN TS
JIC C1
 Preoperation 3.63 2.3 4.85 2.36 3068.48
 Post-CTT 2.32 (− 36.19%) 1.93 (− 16.19%) 3.75 (− 22.76%) 2.04 (− 13.41%) 3356.89 (+ 9.40%)
 Post-LBT 2.49 (− 31.45%) 1.95 (− 14.91%) 4.43 (− 8.65%) 2.30 (− 2.51%) 3227.45 (+ 5.18%)
JIC C2
 Preoperation 3.39 2.35 5.16 2.32 3205.67
 Post-CTT 2.59 (− 23.63%) 1.80 (− 23.48%) 4.04 (− 21.78%) 2.02 (− 12.86%) 3454.55 (+ 7.76%)
 Post-LBT 2.49 (− 26.76%) 1.99 (− 15.24%) 4.11 (− 20.43%) 2.13 (− 8.14%) 3278.12 (+ 2.26%)
  1. WB weight-bearing area, CFH central femoral head, FH femoral neck, TS trochanteric and subtrochanteric region. The value in parentheses is the relative preoperative percentage