What Does an Infection Look Like on a Dental X-Ray?

Sometimes, an infection presents with no symptoms at all. However, your dentist would be able to identify an infection using X-rays or other advanced images. Most dentists take periodic X-rays as part of routine dental care. These images allow the dentist to see beneath the gums to the dental roots and jawbone. A dark area around the root of a tooth, known as a radiolucency, could be a sign that the root is damaged or infected. An X-ray may also reveal decay, which appears as a dark spot within the tooth.

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Is Radiolucency Bad?

A radiolucency on a dental X-ray appears as a dark spot near the tooth root and can indicate infection, decay, or bone loss. While not always a concern, it often suggests pulp damage or an abscess, which may require a root canal to prevent complications. Some radiolucencies are harmless, so Dr. Rink will evaluate your X-ray and any symptoms. If you have pain, swelling, or sensitivity, prompt dental care can help preserve your tooth and prevent more serious issues.

Common Symptoms

The pulp of a tooth can become infected or inflamed due to deep decay, trauma, or repeated dental work. There are several indications of an infection:

Pain

The most common symptom of an infected tooth is pain. Pain can come in the form of sensitivity to hot and cold temperatures, or a severe toothache prompted by actions like chewing or biting. The extent of pain can vary from patient to patient and may present itself consistently or intermittently. Sensations may be throbbing, dull, or sharp and they can affect an isolated area of the mouth or extend to larger stretches of the smile.

Swelling

Swelling can also be a telltale sign of an infection. Nearby gums can swell and become tender. In some cases, inflammation can extend to the face and neck. At times, swelling may be accompanied by pain or a bad taste in the mouth.

Discoloration

An infected tooth may appear dark or discolored. However, you should also keep an eye out for yellow, white, or gray spots on a tooth, as these can be signs of decay. When left untreated, decay can spread to the pulp chamber.

Pimple on the Gums

When a tooth is infected, a pimple-like growth can form on the gums. The technical term for this growth is a sinus tract, but you may also hear it called a fistula. The appearance of this pimple signifies that an infection is draining, and it may be accompanied by a bad odor or taste.

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