The single most important thing you can do to protect a cracked tooth is avoid chewing on it and get to a dentist as soon as possible. Cracks in teeth don’t heal on their own, and every bite you take on that side risks driving the crack deeper. What you do in the hours and days before treatment, and the restoration choices made afterward, directly affect whether the tooth survives long-term.
Know What Type of Crack You’re Dealing With
Not all cracks carry the same risk. Craze lines, those tiny hairline cracks visible on the enamel surface, are cosmetic and painless. Nearly every adult has them, and they don’t need protection beyond normal dental care. A fractured cusp, which typically forms around an existing filling, is also relatively low-risk and rarely causes significant pain.
The cracks that demand immediate attention are the ones that run vertically from the chewing surface toward the gum line. These are classified as “cracked teeth” in dental terminology, and they can worsen quickly under biting forces. If that crack reaches the inner pulp of the tooth where nerves and blood vessels live, the situation becomes much more serious. A split tooth, where the crack divides the tooth into two segments, and a vertical root fracture, which starts below the gum line, are the most severe types and often can’t be saved.
Immediate Steps to Protect the Tooth
Until you can see a dentist, your goal is to keep the crack from spreading and manage pain. Start by switching all your chewing to the opposite side of your mouth. Even soft foods can generate enough force to push a crack deeper if you bite down directly on it.
Rinse gently with warm salt water to keep the area clean and reduce the chance of bacteria entering the crack. If you notice swelling, hold a cold compress against your cheek near the affected tooth for 15 to 20 minutes at a time. Biting down on a piece of moist gauze can help stabilize the tooth temporarily if a piece feels loose.
For pain, ibuprofen (400 mg) is a strong first choice because it reduces both pain and inflammation. You can combine it with acetaminophen (500 mg) for stronger relief. This combination is what dental pain guidelines recommend for toothaches, and it’s often as effective as prescription painkillers. Stay within the daily maximums: 2,400 mg for ibuprofen and 4,000 mg for acetaminophen.
What to Eat and What to Avoid
Hard and crunchy foods are the biggest threat to a cracked tooth. Nuts, seeds, hard candies, popcorn, and ice can all apply uneven pressure that widens the crack or breaks off fragments. Chewy and sticky foods like caramel or taffy are equally dangerous because they grip the tooth and pull on it as you chew.
Stick to soft foods that require minimal chewing: mashed potatoes, yogurt, smoothies, scrambled eggs, and soups with soft ingredients. Keep everything lukewarm. Temperature sensitivity is common with cracked teeth, and very hot or cold foods can trigger sharp pain as fluids seep through the crack to reach the nerve.
How Dentists Restore Cracked Teeth
The right treatment depends on how deep the crack goes and whether the nerve inside is still healthy.
For minor cracks and small chips, dental bonding is the simplest fix. Your dentist applies a tooth-colored resin directly to the surface, sculpting it to cover the crack. It’s done in a single visit and costs less than other options, but the material isn’t as durable and can chip or stain over time. Bonding works best for cracks that are mostly cosmetic.
For deeper cracks or teeth weakened by large fillings, a full-coverage crown is the standard treatment. The crown caps the entire visible portion of the tooth, holding it together and distributing biting forces evenly. Crowns typically require two visits: one to prepare the tooth and take impressions, another to place the permanent crown. They’re more expensive than bonding, but significantly more durable.
The difference in outcomes is dramatic. One study tracking cracked teeth over time found that overall five-year survival was 68%. But cracked teeth that received a full crown after treatment had a 97% survival rate, a finding strong enough that the researchers concluded all cracked teeth should be restored with a full crown when possible.
When a Root Canal Becomes Necessary
If a crack extends deep enough to reach the pulp, bacteria can enter and infect the nerve tissue. Signs this has happened include lingering pain after eating or drinking (especially with hot or cold items), pain that wakes you up at night, swelling near the gum line, or a tooth that hurts when you release a bite rather than when you first bite down.
In these cases, a root canal clears out the infected tissue before a crown is placed on top. Advanced imaging can reveal how far the crack extends along the root, which helps determine whether the tooth is worth saving. Teeth where the crack crosses the floor of the pulp chamber or splits the root are generally considered non-restorable.
When the Tooth Can’t Be Saved
Some cracks put a tooth beyond repair. A fully split tooth, a vertical root fracture, or a crack that has killed the nerve in an otherwise healthy tooth (no cavities, no large fillings) all carry a poor prognosis. In these situations, extraction is often recommended early rather than late. Attempting to save a severely cracked tooth with a dead nerve can lead to progressive bone loss around the root, which complicates future replacement with an implant or bridge.
The key indicators that extraction is the better path: the tooth is split into separate segments, the crack extends below the bone level, or imaging shows bone loss directly adjacent to the crack line. Your dentist or endodontist can identify these markers during evaluation.
Long-Term Protection After Treatment
Once a cracked tooth is restored, protecting it from re-injury matters just as much as the initial treatment. If you grind or clench your teeth at night, a custom-made night guard is one of the most effective tools available. Grinding generates enormous force on your teeth while you sleep, enough to crack healthy teeth and destroy repaired ones. Store-bought guards are cheaper but less effective than custom versions made from impressions of your teeth.
Beyond a night guard, a few habits make a real difference. Don’t chew ice, pen caps, or other hard objects. Cut hard foods like apples and raw carrots into small pieces rather than biting into them with your front teeth. If you play contact sports, wear a mouthguard. And keep up with regular dental visits, because catching new cracks early, before they reach the nerve, is the difference between a simple crown and a root canal or extraction.