Ragab , Mai Hamdy, Asmaa Yousry Abdalla, and Marwa El-Sayed Sharaan. “Location of the Maxillary Posterior Tooth Apices to the Sinus Floor in an Egyptian Subpopulation Using Cone-Beam Computed Tomography”. Iranian Endodontic Journal 17, no. 1 (January 1, 2022): 7-12. Accessed June 29, 2022. https://journals.sbmu.ac.ir/iej/article/view/34696.