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Bar charts that show the percentages of pseudoarthrosis and subsidence in patients treated with different cages for (A) lumbar spinal fusion and (B) anterior cervical discectomy and fusion. [PEEK = Polyetheretherketone; rhBMP-2 = recombinant human bone morphogenetic protein 2; βTCP = beta tricalcium phosphate; BMA = bone marrow aspirate; ABG = autologous bone graft; Ti = titanium].
