How to Know If Your Toothache Needs a Filling or a Root Canal

July 22, 2026
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All toothaches are not the same. Sometimes the problem is mild, caused by a small cavity that can be treated with a simple filling. Other times, infection has reached the inner pulp, necessitating root canal therapy to save the natural structure. Determining the right course of action depends on the nature of the damage, and how far it has progressed.

At Dental Solutions, Dr. Lauren Harmon-Grantham provides personalized toothache treatment in Jonesboro, AR, identifying the source of pain before recommending the most conservative solution possible.

Cavities vs. Tooth Infections: What's the Difference?

Understanding the difference between a filling vs root canal starts with recognizing where the damage is located. A cavity begins when bacteria erode the outer layers of a tooth. If caught early, the damaged area can usually be cleaned and restored with a tooth-colored filling. Left untreated, however, decay can spread into the tooth’s inner pulp, which consists of soft tissue, nerves, and blood vessels. At that point, the tooth becomes infected, and a filling alone is no longer enough.

Filling vs. Root Canal: Recognizing the Symptoms

While only a dental exam can provide a full diagnosis, certain symptoms offer important clues. Typically, a “regular” cavity causes:

  • Mild sensitivity to sweets or cold
  • Occasional discomfort while chewing
  • A visible dark spot or small hole in the tooth

Meanwhile, a toothache that needs a root canal often exhibits more significant symptoms, like:

  • More severe, persistent, or throbbing pain
  • Lingering, heightened sensitivity to hot or cold
  • Swelling or tenderness around the tooth
  • A small pimple on the gums near the affected tooth

These symptoms don't always mean you need root canal therapy, but should be evaluated promptly.

Do You Need a Filling or a Root Canal? Determining the Right Treatment

When assessing damage to a tooth to determine the appropriate treatment, a dentist will examine the tooth, discuss your symptoms, use digital x-rays to determine the depth of the decay. If the damage is confined to the outer portion of the tooth, a filling is often sufficient. However, if the pulp is infected or inflamed beyond repair, root canal treatment can remove the infection while preserving the natural tooth.

Compassionate Toothache Treatment in Jonesboro, AR

If you're suffering from dental pain in Jonesboro and wondering “Do I need a filling or a root canal?", Dr. Lauren Harmon-Grantham and the Dental Solutions team are here to help. Contact us today to schedule an evaluation for expert toothache treatment in Jonesboro, AR, and keep your minor dental issues from becoming big problems.