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

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

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

ISSN: 1471-2474