TY JOUR TI PATHOMORPHOLOGICAL CHARACTERISTICS OF CHANGES IN THE MUCOSA OF THE MAXILLARY SINUS IN OROANTRAL COMMUNICATION KW maxillary sinus perforation KW histopathological changes KW odontogenic sinusitis KW histochemical analysis KW polypous changes KW oroantral anastomosis KW chronic inflammation JO Actual problems in dentistry AU Gatilo, I.A. AU Sirak, S.V. AU Bykova, N.I. PY 2026 IS 22 PB TIRAZH Publishing House