A cracked tooth is one of the more frustrating dental problems to deal with, partly because the symptoms can be unpredictable and partly because cracks are not always visible on X-rays. Despite being common — cracks in teeth are a leading cause of tooth loss in adults — many patients tolerate the discomfort for longer than they should, unsure whether what they are experiencing warrants a dental visit. Understanding what a cracked tooth looks and feels like, and what options are available through general dentistry, can help you act promptly and protect the tooth before the damage worsens.
This article covers the different types of tooth cracks, their symptoms, common causes, and the range of treatments your dentist may recommend.
Types of Tooth Cracks
Not all cracks are the same, and the type of crack present has a direct bearing on what treatment is needed and what the long-term prognosis looks like.
Craze Lines
These are superficial cracks in the outer enamel that do not penetrate deeper into the tooth. They are extremely common, particularly in adults, and typically cause no pain or sensitivity. They may be visible as faint lines on the tooth surface but rarely require treatment beyond monitoring.
Fractured Cusp
A fractured cusp occurs when a piece of the chewing surface of the tooth breaks away, often around an existing filling. The remaining tooth and root are usually intact, and this type of fracture is generally not painful. Treatment typically involves a crown to protect the remaining tooth structure.
Cracked Tooth
A crack that extends from the chewing surface down towards the root is referred to simply as a cracked tooth. This type can cause significant pain, particularly when biting, and may progress over time. Early treatment is important — if the crack extends into the pulp (the inner nerve and blood vessel tissue), root canal treatment may be needed. If it reaches below the gum line, the tooth may not be salvageable.
Split Tooth
A split tooth is a cracked tooth that has progressed to the point where the tooth is divided into two distinct segments. This is often the end result of a crack that went untreated. In most cases, the entire tooth cannot be saved, though in some instances a portion of it can be preserved.
Vertical Root Fracture
These cracks begin in the root and extend upward. They often cause minimal symptoms until infection develops, and are frequently discovered only when the surrounding bone and gum become affected. Extraction is commonly required.
Common Symptoms of a Cracked Tooth
The symptoms of a cracked tooth can vary depending on the type and extent of the crack, and they are not always constant. A characteristic feature is pain that comes and goes rather than persisting continuously. Common symptoms include:
- Sharp pain when biting down, particularly on release rather than when applying pressure
- Sensitivity to hot and cold that lingers after the temperature source is removed
- Sensitivity to sweet foods or drinks
- Intermittent pain that is difficult to pinpoint to a specific tooth
- Swelling of the gum around the affected tooth
- A visible line or fracture on the tooth surface
Because the symptoms are often inconsistent, cracked teeth can be challenging to diagnose. Your dentist may use a special dye, a bite stick, or transillumination (shining a light through the tooth) to help identify the location and extent of the crack.
What Causes Teeth to Crack?
Several factors can contribute to tooth cracking, and in many cases it is a combination of these rather than a single cause:
- Teeth grinding (bruxism): Sustained clenching and grinding places enormous force on teeth and is one of the most common causes of cracks in adults.
- Biting hard foods: Chewing on hard sweets, ice, or unpopped popcorn kernels can fracture a tooth suddenly.
- Large fillings: Teeth with large fillings have less natural tooth structure to support biting forces and are more vulnerable to cracking.
- Trauma: A knock to the mouth from a fall, sport, or accident can cause an immediate crack or weaken the tooth so that it cracks later.
- Age: The incidence of cracked teeth increases with age as teeth accumulate wear and the enamel becomes more brittle.
- Temperature extremes: Repeated exposure to hot and cold — for example, eating hot food followed immediately by cold drinks — can cause the tooth to expand and contract, contributing to cracks over time.
Treatment Options for a Cracked Tooth
| Type of Crack | Likely Treatment | Tooth Saveable? | Urgency |
|---|---|---|---|
| Craze lines | Monitor only; cosmetic bonding if desired | Yes | Low |
| Fractured cusp | Crown or onlay | Usually yes | Moderate |
| Cracked tooth (above gum line) | Crown; root canal if pulp affected | Often yes | High |
| Split tooth | Extraction; possibly partial preservation | Rarely | High |
| Vertical root fracture | Extraction or surgery | Rarely | High |
Dental Crown for a Cracked Tooth
For many cracked teeth, a dental crown is the most effective solution. A crown encases the entire visible portion of the tooth, holding it together and preventing the crack from spreading. It restores the tooth’s function and appearance and can last many years with proper care. Crown treatment involves reshaping the tooth, taking an impression, and fitting a custom-made restoration — usually over two appointments.
Root Canal Treatment
If the crack has extended into the pulp of the tooth, the tissue inside becomes inflamed or infected and root canal treatment may be necessary before a crown is placed. The procedure removes the affected pulp tissue, cleans and seals the root canals, and allows the tooth to be preserved despite the internal damage. Root canal treatment has an undeserved reputation for being painful — in practice, it is carried out under local anaesthetic and relieves the pain caused by the infected pulp.
The NHS page on root canal treatment provides a helpful overview of the procedure and what to expect during recovery.
Living With a Cracked Tooth: Managing Symptoms While Awaiting Treatment
If you suspect you have a cracked tooth but cannot see your dentist immediately, there are a few things you can do to manage the discomfort. Avoid chewing on the affected side, and steer clear of foods and drinks that trigger sensitivity — particularly very hot, cold, or sweet items. Over-the-counter pain relief such as paracetamol or ibuprofen can help manage discomfort, taken according to the packet instructions. However, these are temporary measures; a cracked tooth requires professional assessment as soon as possible.
It is also worth avoiding hard foods, chewing gum, and clenching or grinding your teeth — all of which can deepen an existing crack and make treatment more complex. The sooner you attend for assessment, the greater the likelihood that the tooth can be saved with a conservative restoration.
The Role of X-Rays in Diagnosing Cracks
One of the challenges with cracked teeth is that many types of crack — particularly vertical ones and those that run along the length of the tooth — do not show up clearly on standard dental X-rays. This can make diagnosis more complex and means that clinical examination, including the use of a bite stick and special dyes, is often as important as radiographic evidence. In some cases, cone beam computed tomography (CBCT) imaging may be used by specialist practitioners for a more detailed three-dimensional view of the tooth and surrounding bone.
Despite the diagnostic challenges, an experienced dentist can usually identify a cracked tooth from the pattern of symptoms and clinical findings, even without a visible crack on an X-ray.
Preventing Tooth Cracks
While not all tooth cracks can be prevented, several steps can reduce your risk:
- Wear a custom-fitted night guard if you grind your teeth during sleep
- Wear a sports mouthguard during contact sports
- Avoid habits such as chewing ice, hard sweets, or using your teeth as tools
- Attend regular dental check-ups so that weakened teeth and failing fillings can be identified and treated before they fracture
At Tarbert Dental Surgery, we have experience diagnosing and treating cracked teeth, and we understand how unsettling and disruptive the symptoms can be. If you are experiencing intermittent tooth pain, sensitivity, or discomfort when biting, please do not delay — getting in touch early gives us the best chance of saving the tooth. Call us on 01880 820387 and we will arrange an assessment as soon as possible.