Fig. 4From: Differences in calcification and osteogenic potential of herniated discs according to the severity of degeneration based on Pfirrmann grade: a cross-sectional studyBMP-2, Osterix, and Osteocalcin expression was greater in the posterior part of the removed intervertebral disc than in the anterior part. *P < 0.05, **P < 0.01Back to article page