Is surgery for an antral wall collapse in maxillary sinus worth?

hello. I had sinus surgery nearly 3 months ago but I have still symptoms. today I went to a proffessor.he said that because of the retraction of the sinus wall inward,so much air flows into sinus and this leads nose to become moist, that's why he said that he can close this hollowness by performing a surgery like a filling in dentistry.actually I did not understand what kind of surgery he will perform. can you inform me about this surgical procedure and does it worth?