Could the Topping-Off Technique Be the Preventive Strategy against Adjacent Segment Disease after Pedicle Screw-Based Fusion in Lumbar Degenerative Diseases? A Systematic Review
Table 6
Adjacent segment disease in the fusion alone groups in these cited manuscripts.
(1) UCLA Gr. I or II (no listhesis or lytic lesion) (2) Degenerative (listhesis, spinal stenosis, loss of segmental lordosis) (3) 2 to 4 vertebral fusions
6
3+
3
6
DH: disc height; F/E: flexion/extension. The authors only mentioned numbers of revision surgeries for symptomatic ASD but did not mention numbers of symptomatic ASD. The numbers of symptomatic ASD might be underestimated.