After punctured sinus during rt canal, does puncture wound ever heal? 3 mnths since .. still cough up green phlegm & sore cheek. how to rid infection?

May need antibiotics: You may have an oral-antral fistula (communication between the oral cavity and the maxillary sinus). You refer to a 3 month period with associated signs of infection. This may indicate a need for antibiotic therapy such as oral administration of penicillin-like antibiotics. The quiescence of infection may help the communication to heal and close. If it still persists you may need surgical closure.