Madfa, Ahmed, Mohsen Al‑Hamzi, and Elham Senan. “Cross-Sectional Assessment of the Periapical Status As Related to Quality of Root Canal Fillings and Coronal Restorations in a Yemeni Population.”. Journal of Oral Research 6, no. 1 (January 23, 2017): 19-24. Accessed September 19, 2025. https://www.joralres.com/index.php/JOralRes/article/view/joralres.2017.002.