By Robert Rousseau DMD
December 22, 2021
Category: Oral Health
Tags: tooth decay  

It seems like every year you make at least one trip to the doctor for a sinus infection. You might blame it on allergies or a "bug" floating around, but it could be caused by something else: tooth decay.

We're referring to an advanced form of tooth decay, which has worked its way deep into the pulp and root canals of a tooth. And, it could have an impact on your sinuses if the tooth in question is a premolar or molar in the back of the upper jaw.

These particular teeth are located just under the maxillary sinus, a large, open space behind your cheek bones. In some people, these teeth's roots can extend quite close to the sinus floor, or may even extend through it.

It's thus possible for an infection in such a tooth to spread from the tip of the roots into the maxillary sinus. Unbeknownst to you, the infection could fester within the tooth for years, occasionally touching off a sinus infection.

Treating with antibiotics may relieve the sinus infection, but it won't reach the bacteria churning away inside the tooth, the ultimate cause for the infection. Until you address the decay within the tooth, you could keep getting the occasional sinus infection.

Fortunately, we can usually treat this interior tooth decay with a tried and true method called root canal therapy. Known simply as a "root canal," this procedure involves drilling a hole into the tooth to access the infected tissue in the pulp and root canals. After removing the diseased tissue and disinfecting the empty spaces, we fill the pulp and root canals and then seal and crown the tooth to prevent future infection.

Because sinus infections could be a sign of a decayed tooth, it's not a bad idea to see a dentist or endodontist (root canal specialist) if you're having them frequently. Treating it can restore the tooth to health—and maybe put a stop to those recurring sinus infections.

If you would like more information on the connection between tooth decay and sinus problems, please contact us or schedule an appointment for a consultation. You can also learn more about this topic by reading the Dear Doctor magazine article “Sinusitis and Tooth Infections.”