| http://www.w3.org/ns/prov#value | - Stand-alone intervertebral cages made of a range of materials such as stainless steel, titanium, carbon fiber and polyetheretherketone (PEEK),7,8) can be effective for restoring the intervertebral disc height and lordosis, providing load-bearing support to the anterior column and preventing graft collapse.7,9) However, nonunion and subsidence into the endplates have been reported as the complicati
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