Tooth Fracture: Types, Causes and Treatment Options

What Is a Tooth Fracture?

A tooth fracture refers to a crack, chip or break in the structure of a tooth. Teeth are made up of multiple layers - the enamel (outer layer), dentin (middle layer) and pulp (inner layer). Where the fracture reaches within these layers largely decides how serious it is and how it needs to be treated.

Types of Tooth Fracture

1. Craze Lines

Craze lines are tiny, superficial cracks that affect only the enamel. They are very common in adults and usually develop from normal wear and tear over time. These cracks are typically painless and do not require treatment.

2. Chipped Tooth

A chipped tooth involves a small piece of enamel breaking off, often due to trauma or biting on hard objects.

3. Cracked Tooth

A cracked tooth has a fracture line that extends from the chewing surface toward the root. The tooth is still in one piece, but the crack can worsen over time. Symptoms may include pain when chewing or sensitivity to hot and cold.

4. Split Tooth

A split tooth occurs when a crack progresses and separates the tooth into distinct segments. This type of fracture is usually the result of an untreated cracked tooth.

5. Vertical Root Fracture

Vertical root fractures start in the root and extend upward toward the chewing surface. These fractures often go unnoticed until infection or gum swelling develops.

6. Fractured Cusp

A fractured cusp typically affects the pointed part of a chewing tooth. While it can be painful when biting, it is one of the less severe types of fracture.

Causes of Tooth Fracture

Several factors can contribute to tooth fractures, including:

• Biting hard objects such as ice, hard candy or pens
• Dental trauma from accidents, sports injuries or falls
• Teeth grinding (bruxism), which places excessive pressure on teeth
• Untreated cavities that weaken teeth, making fractures more likely even during normal chewing
• Large or old dental fillings that weaken the tooth structure
• Sudden temperature changes, such as drinking hot beverages after cold foods
• Poor oral hygiene, leading to decay that weakens teeth
• Age-related wear, as enamel becomes thinner over time

Symptoms of a Tooth Fracture

• Pain when chewing or biting
• Sensitivity to hot, cold or sweet foods
• Intermittent tooth pain that comes and goes, making the source hard to pinpoint
• A constant, dull ache in the tooth
• Swelling of the gums around the affected tooth
• Sharp edges that irritate the tongue or cheek
• A small bump or pimple (fistula) on the gum, which can appear if the crack leads to an abscess
• Persistent bad breath, which can be a sign of infection

Treatment Options for a Tooth Fracture

The right treatment depends on the type and severity of the fracture.

Dental Bonding or Fillings

For minor chips or cracks, tooth-coloured resin can restore the tooth's shape and appearance. Best for: craze lines and small chips.

Dental Crowns

Crowns are commonly used for cracked teeth, fractured cusps or weakened teeth. They cover and protect the remaining tooth structure, restoring strength and function. Best for: cracked teeth and fractured cusps. Learn more about crowns & bridges.

Root Canal Treatment

If the fracture extends into the pulp (inner layer), a root canal treatment may be needed to remove the infected tissue and relieve pain. Best for: deep cracks involving the pulp.

Tooth Extraction

Severely fractured or split teeth that cannot be saved may need to be extracted. Replacement options include dental implants, bridges or partial dentures.

Surgical Treatments

Vertical root fractures may require procedures such as root resection or amputation, hemisection, intentional replantation with repair, or laser therapy.

Onlays and Veneers

In some cases, custom restorations such as onlays or veneers may be used for structural or cosmetic repair.

Preventing Tooth Fracture

• Avoid chewing hard objects
• Wear a mouthguard during sports
• Use a night guard if you grind your teeth
• Treat cavities and dental issues early
• Limit sugar and acidic foods
• Stay hydrated
• Eat a nutrient-rich diet
• Practice good oral hygiene to keep teeth strong
• Maintain regular dental check-ups

Frequently Asked Questions