The roots of the upper back teeth, including molars and wisdom teeth, are located very close to the maxillary sinuses. These are air-filled cavities behind your cheekbones. In some people, the roots of these teeth actually extend into the sinus floor, separated only by a thin layer of bone or membrane. When an upper molar is removed, there is a possibility of creating a small communication between the mouth and the sinus.
If a sinus communication occurs, your dentist will take steps to close it, often using stitches. You will be given specific instructions to follow during the healing phase to prevent pressure from building up in the sinuses. It is crucial to avoid blowing your nose forcefully for at least two weeks, as this pressure can push air or bacteria through the extraction site and prevent the opening from healing properly, potentially leading to a chronic issue.
If you need to sneeze, try to do so with your mouth open to allow the pressure to escape without affecting the surgical site. You should also avoid using straws or playing wind instruments during this time. Your dentist might prescribe a nasal decongestant or a specific course of antibiotics to keep the sinus clear and free from infection while the bone and soft tissues close the gap naturally and securely.
Signs that the sinus may be affected include feeling air coming through the socket when you breathe, or fluids passing from your mouth into your nose when you drink. If you notice these symptoms, or if you develop a sudden, heavy pressure in your cheek, contact your registered dentist. Most sinus communications heal perfectly well if the post-operative precautions are followed diligently, ensuring no long-term complications arise for your oral or respiratory health.