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Table 2 Categorizing of five models and their simulated results of seven parameters

From: Influence of the proximal screws of buttress plates on the stability of vertical femoral neck fractures: a finite element analysis

  CS Buttress
Parameters PIIT PIIT+4HI PIIT+4HI-1 PIIT+6HI PIIT+6HI-1
Stiffness (N/mm) 1511.0 1567.6 (+ 3.75%) 1525.8 (+ 0.98%) 1636.5 (+ 8.31%) 1580.1 (+4.57%)
MPS (MPa) / 795.6 294.9 947.2 556.2
MCS (MPa) 336.3 313.2 (−6.87%) 335.9 (−0.12%) 304.3 (−9.52%) 335.1 (−0.36%)
MBS (MPa) 138.8 118.4 (−14.70%) 138.7 (−0.07%) 117.5 (−15.35%) 138.4 (−0.29%)
MIFD (mm) 1.262 1.219 (−3.41%) 1.251 (−0.87%) 1.169 (−7.37%) 1.209 (−4.2%)
MBD (mm) 1.342 1.294 (−3.58%) 1.329 (−0.97%) 1.240 (−7.60%) 1.284 (− 4.32%)
MID (mm) 7.784E−2 6.742E−2 (−13.39%) 7.777E− 2 (−0.09%) 6.626E−2 (−14.88%) 7.742E−2 (−0.54%)
  1. Abbreviations: CS Cannulated screw; MPS Maximal stress of plate and screws; MCS Maximal stress of cannulated screws; MBS Maximal stress of bone; MIFD Maximal displacement of internal fixation; MBD Maximal displacement of bone; MID Maximal relative displacement of interfragments. From the third row on, the values in brackets are the variation rates which were defined in the method