Fig. 3From: Posterolateral fusion combined with posterior decompression shows superiority in the treatment of severe lumbar spinal stenosis without lumbar disc protrusion or prolapse: a retrospective cohort studyFusion standard. a Lumbar radiography and b axial CT showed that a continuous bony bridge had formed between the right L4–S1 laminae and right L4/5, and the L5/S1 facet joint space was replaced by an osseous connection. c Anteroposterior CT showed that there were continuous bony bridges between the L4 and S1 transverse processes at the two sides (Grade A). d Lumbar radiography showed that there were continuous bony bridges in the L3/4 and L4/5 intravertebral spacesBack to article page