Talal Abed, H., & W. Al-Omari, A. (2022). Evaluation of Retention Force of Polyetheretherketone (PEEK) and Cast Cobalt-Chromium Circumferential Clasps: A comparative study. Al-Rafidain Dental Journal, 22(1), 19–27. https://doi.org/10.33899/rdenj.2021.129349.1082