IMPACT OF FRONTAL RECESS CROWDING BY OLFACTORY FOSSA DEPTH AND AGGER NASI CELLS ON THE DEGREE OF FRONTAL SINUS OPACIFICATION ON COMPUTED TOMOGRAPHY. (2026). Vietnam Journal of Community Medicine, 67(CĐ11-NCKH). https://doi.org/10.52163/yhc.v67iCD11.6025