VERDUGO VI. PRESENCE OF MUCOUS RETENTION CYSTS IN THE MAXILLARY SINUS, CUENCA - ECUADOR, 2016-2017. Odontol. Act. [Internet]. 2019 Sep. 10 [cited 2025 Apr. 2];4(3):9-14. Available from: https://oactiva.ucacue.edu.ec/index.php/oactiva/article/view/393