EVALUATION OF THE RELATIONSHIP BETWEEN THE MAXILLARY SINUS FLOOR AND THE ROOT APICES OF THE MAXILLARY POSTERIOR TEETH USING CONE-BEAM COMPUTED TOMOGRAPHIC SCANNING Article Razumova S., Brago A., Howijieh A., Manvelyan A., Barakat H., Baykulova M. Journal of Conservative Dentistry. Wolters Kluwer Medknow Publications. Vol. 22. 2019. P. 139-143