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Table 2 Results of the 5000 cycles tests for both screws

From: Does thread shape affect the fixation strength of the bioabsorbable interference screws for anterior cruciate ligament reconstructions? A biomechanical study

  2.5 mm pitch 5 mm pitch p
Number of valid samples 9 6  
Maximum insertion torque (N m) 2.01 ± 0.45 1.40 ± 0.33  
Stiffness at 500th cycle (N/mm) 270.1 ± 55.7 261.0 ± 69.6 .906
Stiffness at 5000th cycle (N/mm) 281.3 ± 66.4 286.1 ± 79.4 .814
Displacement at 500th cycle (mm) 1.56 ± 0.78 1.84 ± 1.20 .814
Displacement at 5000th cycle (mm) 11.95 ± 14.11 6.97 ± 5.74 .724
Yield load (N) 476.4 ± 65.3 494.3 ± 39.2 .391
Pull-out stiffness (N/mm) 259.9 ± 53.4 236.5 ± 48.6 .886
Ultimate failure load (N) 586.8 ± 44.9 619.1 ± 127.6 .568
  1. Data are presented as mean ± SD
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