The protection of superior articular process in percutaneous transforaminal endoscopic discectomy should decreases the risk of adjacent segment diseases biomechanically

•Biomechanical deterioration was considered primary triggers of adjacent segment disease (ASD).•Our published literature proved that a larger grades of facetectomy may increase the risk low back pain, a common symptom of ASD, So we can hypothesise that which may increase ASD risk biomechanically.•Our computational results indicated, in most body positions, biomechanical indicators deteriorated in the half facetectomy model.•In PTED, on the basis of achieving the surgical purpose, superior articular process should be protected to decreases the risk of ASD biomechanically.