Hussein ZA, Al-Nakib LH. Assessment of the relationship between maxillary sinus floor and maxillary posterior teeth root apices using spiral CT scan. J Bagh Coll Dent. 2013;25(3):80-86. Accessed May 3, 2024. https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/262