Fig. 6From: Clinical experiences with a PEEK-based dynamic instrumentation device in lumbar spinal surgery: 2 years and no moreThe negative-valued radiological parameters preoperatively, directly after the operation and at the 1- and 2-year FU. Lumbar lordosis (LL; light blue), sagittal segmental endplate angle of the instrumentation (SSEI; purple line), and sagittal segmental endplate angle of the dynamic segment (SSED; green line). The mean SSED was reduced after the operation. The reduction in segmental lordosis remained during the follow-up. Mean SSEI increased slightly after the operation and remained during the follow-upBack to article page