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Agreement on the assessment of metastatic spine instability is moderate. The SINS can help improve communication among clinicians in oncology care.

Until fusion occurs, tantalum cage settlement into the vertebral body is to be expected. Further subsidence could be the result of segmental adaptative changes. Graft subsidence did not affect the clinical outcome in any of our patients during long-term follow-up. The occurrence of dynamical implant subsidence had a positive effect on cervical lordosis, especially at the posterior IH.

Rhizolysis is a valuable tool for the symptomatic treatment of chronic lumbar facet joint pain. A meticulous selection of patients using a combination of clinical history, examination, imaging tests, and lumbar facet joint block with a local anesthetic, achieves long-lasting results by helping reduce the impact on these patients' daily activities.