Fig. 1From: Effect of Percutaneous Kyphoplasty on the progression of intervertebral disc degeneration: a retrospective cohort studyMRI of spine assessments. 0: PKP vertebral. 1. Upper disc of the kyphoplasty vertebral group (KVG). 2. Lower disc of the KVG. 3. Upper disc of the non-traumatized vertebral group (NTVG). 4. Lower disc of the NTVGBack to article page