Effect of Discectomy on Dynesys Dynamic Fixation in the Treatment of Lumbar Degenerative Diseases

Figure 1

The typical cases in group A. A 57-year-old male patient developed L4/5 spinal stenosis who was assigned group A. A–E show the preoperative X-ray and MRI scans. The intervertebral height and ROM of surgical were 11.35 mm and 5.5°, respectively. MRI scans showed the spinal stenosis was severe on the right side. The Pfirrmann grading was grade 3. The patient underwent spinal decompression without discectomy and Dynesys dynamic fixation. F and G show the 1-week postoperative X-rays. H–L show the 2-year postoperative X-ray and MRI scans. At the 2-year follow-up, the intervertebral height and ROM of surgical were 10.5 mm and 4.4°, and the retained percentages were 92.5% and 80.0%, respectively. MRI scans showed there was no stenosis in the spinal canal and disc herniation improved. The Pfirrmann grading was grade 2.

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