Figure 2.

Median total intervertebral disc space. Median total (tot.) intervertebral disc space (mm) for all levels of the cervical spine was calculated as the sum of the minimum anterior, posterior, right, and left intervertebral disc spaces and normalized to baseline disc space for each level of the cervical spine at each timepoint (postop disc space—preop disc space). The error bars indicate the range. Multiple Wilcoxon tests corrected for multiple comparisons were used to compare the groups. C indicates cervical vertebral number; M, months postsurgery; N, number of animals; postop, postoperative; preop, preoperative; SBG, synthetic bone graft. Statistical significance was set at P<0.05.