A Salim, H., A. I Naser, and Z. H Delemi. “Assessment of Peri Implant Osteal Changes by Radiographic Evaluation Using Standard Orthopantomograph and Periapical View a Retrospective Study”. Al-Rafidain Dental Journal, vol. 18, no. 1, Mar. 2018, pp. 59-66, doi:10.33899/rden.2018.160842.