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Elkholly, A.; Negm, M.; Hassan, R.; Omar, N. Healing Assessment of Osseous Defects After Surgical Removal of Periapical Lesions in the Presence of Hydroxyapatite, Nanohydroxyapatite, and a Combination of Nanohydroxyapatite and Platelet-Rich Fibrin: A Clinical Study. Open Access Maced J Med Sci 2022, 10, 406-414.