Analysis of Lumbar Sagittal Curvature in Spinal Decompression and Fusion for Lumbar Spinal Stenosis Patients under Roussouly Classification

Figure 4

A 67-year-old male with diagnosed with lumbar spinal stenosis and had back pain for 3 years, with intermittent claudication. (a) Preoperative X-ray showed , , Roussouly type II, lumbar lordosis apex at L4 base, , , , , . (b) Preoperative lumbar CT and MRI showed L4/5 segment disc herniation, yellow ligament hypertrophic, dural compression, and spinal canal narrowing. (c) Postoperative X-ray showed that , , Roussouly type III, the lumbar lordosis vertex was at the L4 midpoint, , , , , . SS, GL, and GK increased; SVA and PT decreased; PI unchanged. Lordosis vertex moved up to the L4 midpoint, classification from Roussouly types II to III (standard).

(a)

(b)

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