Tissue defects resulting from the oncological treatment of tumors in the middle part of the face often lead to the connection of the oral cavity with the respiratory tract. Chewing and swallowing problems as well as speech disorders are the most serious consequences of surgery, which have a negative impact on the quality of life of patients. In many cases , the use of obturator protheses can be an effective method of rehabilitation. However, obturators extend beyond the boundaries of the mouth. By interfering with the nasal cavity and maxillary sinuses, they affect the functions of the entire respiratory system, which should be taken into account when planning and implementing prosthetic treatment.