Cracked Tooth: Symptoms, Causes, and What to Do Next

A cracked tooth is more common than most people realize — and more serious than many people assume. Cracks range from minor surface fractures to deep splits that can cost you the tooth. Understanding the symptoms and responding promptly makes a significant difference in the outcome.

Symptoms of a Cracked Tooth

The classic symptom is sharp pain when biting down, particularly when releasing pressure (biting releases, not biting harder). This is the hallmark of what dentists call “cracked tooth syndrome.” You may also experience sensitivity to temperature — cold especially, but sometimes heat. The pain may come and go, which is why cracked teeth can be easy to dismiss or difficult to diagnose.

Other signs include a visible line on the tooth surface (though many cracks are too small to see), pain that’s hard to pinpoint, or a tooth that just “feels different” when you bite on it.

What Causes Teeth to Crack

Chewing on hard objects — ice, hard candy, unpopped popcorn kernels, pen caps — is a leading cause. Tooth grinding (bruxism) puts constant excessive force on teeth and makes cracking more likely over time. A direct blow to the mouth or face from a fall or accident can crack teeth. Teeth that have large old metal fillings are actually more prone to cracking because the filling weakens the surrounding tooth structure. Extreme temperature changes (eating very hot food followed by ice water) can also create micro-cracks over time.

Types of Cracks and What They Mean

A craze line is a tiny surface crack in the enamel only — cosmetically noticeable but not structurally significant. A fractured cusp involves a piece of the chewing surface; it often doesn’t involve the nerve and can be repaired with a crown. A crack extending toward the root is more serious and may require a root canal. A split tooth, where the crack has gone all the way through, may not be saveable. A vertical root fracture starts at the root and grows upward — these usually require extraction.

What to Do If You Suspect a Cracked Tooth

Call your dentist promptly. A cracked tooth is not an emergency in most cases, but it’s not something to wait on either. The crack will not heal on its own and will likely worsen. Avoid chewing on that side of your mouth until you’re seen. Take over-the-counter pain medication as needed for comfort.

If you can’t get to a dental office, Smiles by Delivery can come to you, evaluate the tooth, and discuss your treatment options at home.