Biomechanical evaluation of strategies for adjacent segment disease after lateral lumbar interbody fusion: Is the extension of pedicle screws necessary

Adjacent segment disease (ASD) is a well-known complication after interbody fusion. Pedicle screwrod revision possesses sufficient strength and rigidity. However, is a surgical segment with rigid fixation necessary for ASD reoperation? This study aimed to investigate the biomechanical effect of different instrumentation on lateral lumbar interbody fusion (LLIF) for ASD treatment.