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Flexion and extension lateral radiographs of cervical spine showed kyphotic positioning of prosthesis with subsidence and incomplete decompression (black arrow) at C5-6 and pseudoarthrosis at C4-5 (A and B). Flexion and extension lateral radiographs of 2-year follow-up showed anterior removal of prosthesis, decompression with solid fusion at C4-5 and C5-6 (C and D).
