Health

The roots of the upper back molars extend into the maxillary sinus cavities. This means that when the maxillary sinuses are infected, the increased pressure caused by trapped mucous, pushes down on the roots. This causes the upper jaw to ache followed by a throbbing toothache. Other symptoms of maxillary sinus infection are facial tenderness and swelling in the cheek area. This particular pain is not dental related.

Sinus toothache usually accompanying sinus infection in the maxillary sinuses.Sinus toothache occurs when the pressure building from the maxillary sinus infection pushing down on the exposed roots in the upper back molars. Even experienced dentists even have difficulty differentiating between sinus and toothache dentist toothache.

If the rear upper molars become infected, the answer is yes. As mentioned above, the Maxillary sinuses and the mouth  are connected by a U shaped opening called the alveolar. This cavity is occupied by the roots of the upper back molars. If you suffer from periodontal disease or develop an abscess below the gum line, bacteria will tend to migrate up the alveolar and invade the maxillary sinuses, thereby causing sinus infection.