Broken Tooth — What to Do and When It’s an Emergency

Teeth break for many reasons — biting on something hard, a fall or impact, an existing large filling that has weakened the surrounding structure, or grinding that has progressively thinned enamel to the point of fracture. Whatever the cause, a broken tooth always warrants professional assessment. The visible damage on the surface rarely tells the complete story of what has happened beneath it.

How broken teeth are classified

Not all tooth fractures are equal. Dentists classify tooth fractures by depth and location, which determines both urgency and treatment options.

Craze lines Superficial cracks confined entirely to the outer enamel surface. Extremely common, particularly in adults over 40. They cause no symptoms, require no treatment, and are clinically insignificant. They are worth knowing about because patients sometimes notice them and worry — they are a normal consequence of a lifetime of chewing.

Fractured cusp A piece of the biting surface of a tooth — typically a cusp — breaks away, usually around an existing filling. Often produces sharp sensitivity rather than severe pain, as the fracture may not extend into the pulp. The broken piece may detach completely or remain partially connected. Treatment typically involves a new filling, onlay, or crown depending on the size of the fracture and remaining tooth structure.

Cracked tooth A crack extending from the biting surface downward toward the root. This is the most diagnostically challenging fracture type because it is frequently invisible on X-ray and may not be obvious visually. Symptoms — sharp pain on biting, sensitivity to cold, discomfort on release of biting pressure — are the primary diagnostic indicators. Treatment depends on crack depth: a crown for cracks confined to the crown of the tooth, root canal treatment plus crown if the pulp is involved, extraction if the crack extends below the bone level.

Split tooth A cracked tooth that has propagated completely through the tooth, dividing it into two distinct segments. A split tooth cannot be saved intact. Depending on the position of the split, one segment may occasionally be retained, but most split teeth require extraction.

Vertical root fracture A crack originating in the root and extending upward. Often associated with root-filled teeth where the root has become brittle over time. Frequently asymptomatic until surrounding bone loss occurs — making it one of the more insidious fracture types. Typically identified on X-ray by a characteristic halo pattern of bone loss around the root. Almost always requires extraction.

Traumatic fracture — crown fracture involving enamel and dentine Common in anterior teeth following impact — a fall, sports injury, or collision. The fracture exposes dentine, producing sensitivity. If the pulp is not exposed, the prognosis with prompt treatment is very good. If the pulp is exposed — visible as a pink or red dot at the fracture surface — urgent treatment is required to prevent infection.

What to do immediately after breaking a tooth

1. Assess the situation Run your tongue carefully over the broken area. Note whether there is sharp pain, sensitivity, bleeding from the gum, or a visible pink or red area at the fracture site. These findings indicate urgency.
2. Retrieve any broken fragments If a piece of tooth has broken off, store it in milk, saline, or inside your cheek — not in water, which damages the cells on the root surface. A fragment can sometimes be bonded back in place, particularly for front teeth, providing an excellent aesthetic result.
3. Manage sharp edges A broken tooth with a sharp edge can lacerate the tongue and cheek. Dental wax from a pharmacy can be pressed over the sharp edge as a temporary measure. Sugar-free chewing gum is an alternative in an emergency.
4. Pain management Paracetamol and ibuprofen at recommended doses for pain relief. Clove oil applied to the broken area provides additional topical relief. Avoid temperature extremes — hot and cold — that will exacerbate sensitivity through the exposed dentine.
5. Contact your dentist promptly Even a broken tooth that is not causing significant pain requires assessment within a few days. Exposed dentine is vulnerable to bacterial invasion, and a fracture that appears minor externally can have implications below the gumline that are not apparent without clinical examination and X-rays.

When a broken tooth is a dental emergency

Some broken teeth require same-day or next-day attention. Contact Tooronga Family Dentistry urgently if:

• The pulp is visibly exposed — pink or red tissue visible at the fracture site
• There is significant bleeding from the tooth or surrounding gum that does not settle
• The tooth is mobile or has been partially displaced from its socket
• There is severe uncontrolled pain
• The fracture involves a child’s tooth — primary or permanent
• The injury involves the jaw, other facial structures, or head trauma

A tooth that has been completely knocked out — avulsed — is a true dental emergency. Reimplantation within 30 minutes gives the best chance of saving the tooth. Handle the tooth by the crown only, rinse gently without scrubbing the root, store in milk or saline, and contact us immediately. Time is the critical variable.

How Tooronga Family Dentistry treats broken teeth

Composite bonding For minor chips and fractures involving enamel and superficial dentine — particularly on front teeth — composite resin bonding restores shape, function and aesthetics in a single appointment. Where a fragment has been retained, bonding it back into place is often the most aesthetically precise option.

Fillings and onlays For fractured cusps and moderate fractures on back teeth, a new direct composite filling or a laboratory-fabricated onlay restores the tooth. An onlay is preferable where the remaining tooth walls are thin or unsupported — it covers and protects the cusps rather than simply filling space.

Crowns The definitive restoration for a cracked tooth, a tooth with a large fracture, or any tooth where the remaining structure needs to be held together and protected from further fracture propagation. A crown encircles the entire tooth, distributing biting forces evenly and preventing the flexion that causes crack-related pain. For cracked teeth in particular, crowning is not simply restorative — it is protective.

Root canal treatment Required when a fracture has involved or compromised the pulp. Root canal treatment removes the pulp tissue, disinfects the root canal system, and prepares the tooth for crown placement. A root-treated tooth that is promptly and properly restored with a crown has a very good long-term prognosis.

Extraction and replacement Where a fracture extends below the bone level, or a vertical root fracture is present, extraction is the appropriate treatment. We discuss tooth replacement options — dental implant, bridge, or partial denture — at the time of extraction planning so that the long-term treatment pathway is clear from the outset.

Splinting for traumatic injuries A tooth that has been displaced or loosened by trauma may be splinted — bonded to adjacent teeth with a flexible wire and composite — to allow the periodontal ligament to heal and the tooth to stabilise. Splinting is typically maintained for two to four weeks, with the tooth monitored for pulp health in the months following injury.

Preventing broken teeth

Many tooth fractures are preventable with appropriate protective measures:

• Custom mouthguard for all contact and collision sports — a professionally made mouthguard from Tooronga Family Dentistry provides significantly better protection than a boil-and-bite alternative from a sports store
• Nightguard for grinding — bruxism is one of the most common causes of tooth fracture; a custom occlusal splint protects enamel and existing restorations from the forces of nocturnal grinding
• Replacing large old amalgam fillings proactively — large amalgam restorations weaken surrounding tooth structure over decades; replacing them with bonded composite or covering with a crown before fracture occurs is sound preventive planning
• Avoiding hard objects — ice, hard lollies, unpopped popcorn kernels, using teeth as tools — these are among the most common precipitants of acute tooth fractures in otherwise healthy teeth

Broken a tooth? Don’t wait to see if it settles. Book an assessment at Tooronga Family Dentistry — we see patients from Glen Iris, Malvern, Hawthorn, Hawthorn East and Ashburton promptly and have the clinical tools to assess, diagnose and treat the full range of tooth fractures.