Fig. 7From: Effects of resting modes on human lumbar spines with different levels of degenerated intervertebral discs: a finite element investigationComparison of the changes of the pore pressure in the center of the nucleus subjected to different load cases for all models. Pore pressure works to resist mechanical stress in the solid matrix of disc by hydration of molecules. Proper increasing pore pressure can reduce the load sustained by the solid phase, which is beneficial to restoration of degenerated disc. a Grade 0, b Grade 1, c Grade 2, d Grade 3Back to article page