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Radiological kinematic graphs at time point of measurement. Line graphs illustrating the cervical lordosis (A), global range of motion (ROM; B), upper adjacent segment ROM (USROM; C), lower adjacent segment ROM (LSROM; D), upper adjacent disc height (UDH; E), lower adjacent disc height (LDH; F) for 1-, 2-, and 3-level anterior cervical discectomy and fusion (ACDF) groups preoperatively, and then at 6, 12, and 24 months after surgery. Preop, preoperative.
