How a cracked tooth gets fixed depends entirely on how deep and how far the crack extends. A shallow surface crack needs nothing more than cosmetic bonding, while a crack that reaches the nerve or splits the tooth in two may require a root canal or extraction. The good news: most cracked teeth fall somewhere in the middle and can be saved with the right treatment.
Not All Cracks Are the Same
Dentists classify tooth cracks into five categories, and knowing which type you’re dealing with is the first step toward the right fix.
Craze lines are the most common and least serious. These are tiny, shallow cracks limited to the outer enamel. The majority of adult teeth have them. They show up as faint vertical lines on front teeth or small lines crossing the chewing surfaces of back teeth. They don’t hurt, don’t grow, and rarely need treatment beyond cosmetic improvement if they bother you visually.
Fractured cusps happen when one of the raised points on a back tooth breaks away, usually around an existing filling that has weakened the surrounding tooth structure. The crack typically runs along the side of the tooth and stops near or just below the gumline. These rarely damage the nerve, so they’re usually fixable without major intervention.
Cracked teeth have a crack running from the chewing surface downward toward the root, but the tooth hasn’t separated into pieces yet. The crack generally runs front-to-back through the center of the tooth. This is the type most people mean when they search for “cracked tooth,” and it’s also the trickiest to manage because the outcome depends on how deep the crack goes.
Split teeth are what happens when a cracked tooth goes untreated long enough for the crack to propagate all the way through, separating the tooth into two distinct segments. By this stage, saving the entire tooth is rarely possible.
Vertical root fractures start in the root and work upward. They often develop in teeth that have already had root canal treatment. In most cases, extraction is the only option, especially when the fracture is complete or has caused bone loss around the tooth.
How Each Type Gets Repaired
Dental Bonding
For craze lines and small cracks that haven’t reached the inner layers of the tooth, bonding is the simplest fix. Your dentist applies a tooth-colored resin directly into the crack, then hardens it with a curing light. The whole process takes one visit. Bonding typically costs $350 to $700 per tooth, with per-tooth discounts when multiple teeth need work.
Dental Crowns
Fractured cusps and deeper cracks that haven’t reached the nerve are best treated with a crown, a porcelain or ceramic cap that fits over the entire visible portion of the tooth. The crown holds the tooth together and prevents the crack from spreading further. Some dental offices can mill and place a crown in a single appointment using digital scanning, but the process often takes two visits: one to prepare the tooth and take impressions, and a second to cement the permanent crown. Crowns run $1,200 to $2,500 per tooth.
Root Canal Plus Crown
When a crack extends deep enough to reach the pulp (the soft tissue inside the tooth containing nerves and blood vessels), bacteria can get in and cause infection. A root canal removes that infected tissue, and a crown goes on top to protect what’s left. The overall success rate for root canal treatment on cracked back teeth is roughly 83%, with survival rates near 90% over about three years of follow-up. Those numbers shift dramatically based on crack depth: teeth where the crack hasn’t extended far into the root and the surrounding gum tissue is healthy have success rates between 79% and 98%. Teeth where the crack has reached deep into the root and created a gum pocket of 5 mm or more drop to a success rate of about 33%.
Veneers
For cracked front teeth where the damage is mostly cosmetic, veneers are a good option. These are thin, custom-made shells bonded to the front surface of the tooth. They take three to four weeks to fabricate, so you’ll wear a temporary veneer in the meantime.
Extraction and Replacement
Some cracks can’t be repaired. Split teeth, vertical root fractures, and cracks that have caused severe bone loss around the root all typically require extraction. Vertical root fractures are particularly problematic because they often erode the bone surrounding the tooth. If that bone loss becomes severe, it can even reduce the support available for a future dental implant. After extraction, the tooth is usually replaced with either a bridge or an implant. Implant-based replacement can take several months from start to finish because the implant needs time to fuse with the jawbone before the final crown is placed.
Signs You Might Have a Cracked Tooth
Cracked teeth have a distinctive pain pattern that sets them apart from cavities. The hallmark symptom is a sharp, sudden pain when you bite down on something, particularly when you release the bite. The pain comes and goes rather than lingering the way a toothache from decay does. You may also notice increased sensitivity to hot, cold, or sweet foods and drinks. Some people feel the pain only with certain foods or only when chewing on one side.
Not all cracks cause symptoms. Craze lines are painless. Vertical root fractures can cause a vague, dull ache that’s easy to dismiss. If you’re feeling intermittent sharp pain when chewing, that’s the most reliable signal that a crack needs attention before it worsens.
How Dentists Find the Crack
Cracks are notoriously difficult to detect. They often don’t show up on standard dental X-rays, especially in the early stages. Your dentist may use a few different approaches: shining a bright light through the tooth (transillumination) to make the crack line visible, having you bite down on a small stick or cushion to reproduce the pain, probing the gums around the tooth to check for deep pockets that suggest a root-level fracture, or applying a special dye that seeps into crack lines and makes them easier to see. Sometimes an existing filling needs to be removed before the full extent of the crack becomes clear.
What Recovery Looks Like
Recovery from most cracked tooth repairs is straightforward. Discomfort typically fades within a few days to a week. For the first 24 to 48 hours, stick to soft foods: yogurt, mashed potatoes, scrambled eggs, smoothies, soups. Avoid anything very hot, cold, or spicy, as these can irritate the treated area. Hard, crunchy, and sticky foods are off the table initially because they can damage a fresh repair.
As you start feeling more comfortable, gradually add firmer foods back into your diet, chewing on the opposite side of your mouth at first. Most people return to their normal eating habits within about a week. If you had a root canal, the timeline may stretch a bit longer, and the tooth will feel different for a while since the nerve has been removed.
Why Timing Matters
The single most important factor in saving a cracked tooth is how far the crack has progressed. A crack limited to the crown of the tooth, with healthy gums and no infection, has an excellent chance of being saved with a crown or root canal. The same tooth left untreated for months can become a split tooth, and at that point, extraction is often the only path forward. Cracks don’t heal on their own. They only grow. If you’re experiencing the on-and-off sharp pain that suggests a crack, getting it evaluated sooner rather than later is the difference between a crown and losing the tooth entirely.