Fig. 3.

Lateral radiographs and changes in disk height index. (Left) Representative serial lateral radiographs of a lumbar spine of a rabbit obtained initially presurgery, 4 weeks after injury, and 8 weeks after treatment. (Right) Average disk height indexes were calculated presurgery, 4 weeks after injury, and 8 weeks after treatment in disks that were intact, injured, and treated with neonatal human dermal fibroblasts (nHDFs) and injured and treated with saline. The average disk height index was normalized to the presurgical disk height index. *Significant difference between the two time points: 4 weeks after injury and 8 weeks after nHDF treatment (p < 0.05). Error bars represent the standard error of the mean.