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The von Mises stress cloud map of C6–7 intervertebral disc in operation finite element (FE) models. Stress distribution characteristics of C6–7 intervertebral discs in different FE models during flexion, extension, left bending, right bending, left rotation, and right rotation were shown. ACDF, anterior cervical discectomy and fusion; ZOP, zero-profile; CDA, cervical disc arthroplasty.
