What is Pericoronitis? When Wisdom Teeth Irritate Your Gums

If you or your young adult child are in the age range where wisdom teeth are trying to emerge, you might encounter a localized gum issue known as pericoronitis. This condition happens when a wisdom tooth only partially breaks through the gumline, leaving a small flap of overlapping gum tissue (called an operculum) resting directly over the chewing surface of the tooth.

This tiny flap of gum tissue creates a ideal trap for food particles, saliva, and bacteria. Because the back of the jaw is difficult to reach with a standard toothbrush or floss, plaque quickly accumulates underneath the flap. Over time, the trapped bacteria trigger localized swelling, redness, severe tenderness, and a foul taste or odor coming from the back of the mouth.

In mild cases, pericoronitis causes temporary localized discomfort when biting down, as the opposing upper tooth presses against the swollen gum flap. However, if left unaddressed, the infection can spread into the surrounding cheek and jaw tissues, leading to difficulty opening your mouth fully (trismus), painful swallowing, and general facial swelling.

Initial treatment involves flushing out the trapped debris underneath the gum flap using a warm salt water rinse or an antibacterial rinse prescribed by your dentist. If the wisdom tooth has plenty of room to grow in straight, simply trimming the overlapping gum flap may solve the problem. However, if the tooth is impacted or crooked, gently removing the wisdom tooth is usually the permanent fix.

At Petras Family Dental in Amherstburg, we monitor the development of wisdom teeth closely using modern imaging to catch pericoronitis early. We provide gentle, effective treatments to clear up gum infections and keep your mouth feeling healthy. Contact us today at 519-713-8985 or visit petrasfamilydental.com/book to schedule an evaluation.