Fig. 1From: Biomechanical effect of endplate defects on the intermediate vertebral bone in consecutive two-level anterior cervical discectomy and fusion: a finite element analysisAÂ A three-dimensional finite element (FE) model was developed. B-GÂ Â Two-group models of two-level anterior cervical discectomy with fusion (ACDF) using different internal fixation were established. B-CÂ C4-C6 implanted by the zero-profile device (ZP). C-DÂ C4-C6 with the endplate injury implanted by the ZP. E-FÂ C4-C6 implanted by the cage-plate device (CP). F-GÂ C4-C6 with the endplate injury implanted by the CPBack to article page