GRO , R. H., and H. D. MOUSA. “EFFECT OF OSTEONTM II COLLAGEN IN THE TREATMENT OF CHRONIC PERIODONTITIS PATIENTS: A CLINICAL AND RADIOGRAPHICAL STUDY”. Journal of Duhok University, Vol. 26, no. 1, May 2023, pp. 336-47, doi:10.26682/sjuod.2023.26.1.32.