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Table 2 Comparison of facet contact forces under torsion between the present study and studies by Chen [[18]] and Shirari-Ad1 [[32]]. (unit: N)

From: Biomechanical comparison of unilateral and bilateral pedicle screws fixation for transforaminal lumbar interbody fusion after decompressive surgery -- a finite element analysis

Left torsion Loading conditions L1-2 L2-3 L3-4 L4-5
Present study 10 N-m with 150 N preload 117 135 123 108
Chen’s 10 N-m with 150 N preload 121 157 161 155
Shirazi-Ad1’s study 10 N-m 107 123 117 78