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Changes in DSB throughout a PJK case. For this subject, radiographic alignment demonstrates the effect of PJK on alignment between pre- and post-PJK images. Post-revision surgery realigns the spine. Plots of DSB metrics (peak SVA, hip/knee energy ratio, hip/knee torque ratio) show how these subject’s data (red) were higher than the control data before developing the PJK and then trends toward the control data following successful revision surgery
