Al-Sarraj, Saba S, and Saif S Saliem. 2014. “Stem Cells a Novel Approach to Periodontal Regeneration (A Review of Literature) ”. Journal of Baghdad College of Dentistry 26 (3): 89-97. https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/523.