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Table 2 Comparison of the peak stress values and the normalized von Mises stress pattern between the SHFZ and No-SHFZ plates in three different loading conditions

From: Finite element analysis comparison between superior clavicle locking plate with and without screw holes above fracture zone in midshaft clavicular fracture

Reference pointa Peak von Mises stress value (MPa)
Cantilever bending load Axial compression load Axial torsion load
SHFZ plate No-SHFZ plate SHFZ plate No-SHFZ plate SHFZ plate No-SHFZ plate
M1 100.48 116.63 6.60 7.40 17.13 17.54
M2 88.18 84.84 12.35 11.54 37.39 39.44
M3 628.77 647.21 Max 123.89 128.61 74.52 79.47
FZ-M 1257.10 Max 561.30 186.42 Max 97.30 103.42 59.07
FZ-L 1131.80 514.42 178.72 93.19 111.86 Max 59.09
L1 428.44 461.05 124.78 131.63 Max 79.19 82.41 Max
L2 81.74 54.76 20.47 21.03 33.23 33.09
L3 55.34 54.76 5.21 5.75 16.20 16.86
Average peak stressb
 Medial clavicle (M1–3) 358.48 282.89 47.61 49.18 43.01 45.48
 FZ (FZ-M, FZ-L) 1194.45 537.86 182.57 95.25 107.64 59.08
 Lateral clavicle (L1–3) 188.51 190.19 50.15 52.80 42.87 44.12
  1. aReference point: the point of each screw hole (SH) position in the SHFZ plate, or the same position in the No-SHFZ plate, from medial end to lateral end
  2. M1, M2, and M3: the 1st, 2nd, and 3rd medial SH positions of the medial clavicle fragment
  3. FZ-M and FZ-L: the medial and lateral SH positions, or the same ones in the No-SHFZ plate, above the fracture zone
  4. L1, L2, and L3: the 1st, 2nd, and 3rd medial SH positions on the lateral clavicle fragment
  5. bAverage peak stress: the mean of peak stress value in each zone (medial clavicles include M1, M2, and M3; SHFZ includes FZ-M and FZ-L; and lateral clavicle include L1, L2, and L3)
  6. Max: the presented reference point has the highest peak von Mises stress value in that loading condition