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Assess the biomechanics of combined fixation using new screws in L4-5 transforaminal lumbar interbody fusion (TLIF).

Finite element analysis of the biomechanics of fusion-fixed segments based on combined placement of new screws applied under TLIF

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Randomized trial assesses new screw fixation effect on biomechanics in spine surgery, indicating potential for improved outcomes.

Assess the biomechanics of combined fixation using new screws in L4-5 transforaminal lumbar interbody fusion (TLIF).
Finite element analysis evaluated range of motion (ROM), cage stress, and rod stress.
Combined fixation involved pedicle screws and MCBT (multiscrew construct).
New screws reduced ROM in flexion, left bending, and left rotation (p<0.05).
Cage stress decreased during extension, left bending, and rotations (p<0.05).
Rod stress increased safely without significant adverse effects.

Xiao et al. (2026) studied this question.

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