The Influence of Posture on Instability Evaluation Using Flexion–Extension X-Ray Imaging in Lumbar Spondylolisthesis

Study Design: Prospective clinical study. Purpose: To determine the optimal posture for instability evaluation using flexion–extension X-ray imaging in patients with lumbar spondylolisthesis. Overview of Literature: Currently, is most practical approach instability. In imaging, achievement greatest segmental motion movement necessary. However, to our knowledge, currently, there no standardized determining Methods: Twenty-three individuals spondylosis related fourth vertebra underwent different postures (standing, sitting, and lateral decubitus positions), magnetic resonance (MRI), low back pain Visual Analog Scale (VAS) on same day. Intervertebral angle, percent slippage, intervertebral disc area ratio during flexion extension were compared Tukey’s method. The effect association between MRI facet effusion these measurements investigated according posture. Results: slippage (p=0.036), change (p=0.004), angle (p=0.042) significantly sitting positions. There also significant differences standing positions (p=0.010). VAS score <40, (p=0.011) positions, (p=0.048), disk (p=0.008) We found relationship terms Conclusions: this study, was best evaluated position when vertebral