Can a Cracked Tooth Be Saved?

edit_note Townsville Dental Directory editorial team · Updated 19 May 2026
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Whether a cracked tooth can be saved depends entirely on the type, extent, and location of the crack. Some cracks are harmless and need no treatment; others can be restored with a crown; and some unfortunately require extraction. At Townsville Dental Clinic, we use advanced diagnostic techniques to assess every crack and give you a clear, honest prognosis. The American Association of Endodontists identifies five distinct types of tooth cracks, each with a different treatment pathway and outlook. Early diagnosis is crucial — a crack that is treatable today may become unsaveable if left to progress.

The Five Types of Tooth Cracks

1. Craze Lines

What they are: Tiny, shallow cracks confined to the outer enamel layer. Nearly every adult has craze lines, particularly on the front teeth.

Prognosis: Excellent. Craze lines are cosmetic only — they do not cause pain, do not weaken the tooth, and do not progress to deeper cracks.

Treatment: None required. If they cause cosmetic concern on visible front teeth, porcelain veneers can mask them.

2. Fractured Cusp

What it is: A piece of the tooth’s chewing surface breaks off, typically around a large existing filling. The break usually stays above the gum line and does not involve the pulp.

Prognosis: Good. The tooth can almost always be saved.

Treatment: The broken piece is removed and the tooth is restored with a crown or onlay to protect the remaining structure. Root canal treatment is rarely needed unless the fracture extends into the pulp.

3. Cracked Tooth

What it is: A crack that extends from the chewing surface vertically toward the root. The tooth is not yet separated into segments, but the crack may extend below the gum line.

Prognosis: Variable — depends on how far the crack extends.

  • If the crack has not reached the pulp and stays above the bone level, the tooth can usually be saved with a crown
  • If the crack has reached the pulp, root canal treatment followed by a crown is needed
  • If the crack extends below the bone level, the tooth may not be saveable

Treatment: Crown, possibly with root canal treatment. Early detection and treatment before the crack deepens gives the best outcome.

4. Split Tooth

What it is: The crack has progressed until the tooth has separated into two distinct segments. This is often the end result of an untreated cracked tooth.

Prognosis: Poor for the whole tooth. Occasionally, if the split allows one viable root and sufficient tooth structure to remain, a portion of the tooth may be saved.

Treatment: Usually extraction. In rare cases on multi-rooted molars, hemisection (removing one root and its attached portion) may be possible.

5. Vertical Root Fracture

What it is: A crack that begins in the root and extends upward toward the chewing surface. These fractures often occur in teeth that have previously had root canal treatment.

Prognosis: Poor. Vertical root fractures often go undetected until infection develops in the surrounding bone.

Treatment: Extraction in most cases. The fracture compromises the seal of the root, allowing bacteria to infect the surrounding bone continuously.

How We Diagnose Cracks

Cracks can be notoriously difficult to detect. At Townsville Dental Clinic, we use a combination of techniques:

  • Transillumination — a fibre-optic light is shone through the tooth. A crack will block light transmission, making it visible
  • Bite test — biting on a Tooth Slooth or cotton roll isolates individual cusps to reproduce the pain
  • Methylene blue staining — a dye that seeps into crack lines, making them visible
  • Digital X-rays — while cracks themselves are rarely visible on X-rays, associated bone loss or periapical changes can indicate a fracture
  • Magnification — examination under dental loupes or an operating microscope

What Causes Teeth to Crack?

Risk FactorWhy It Causes Cracks
Large existing fillingsFillings do not flex like natural tooth — they weaken the surrounding walls
Bruxism (grinding)Sustained excessive force, especially on molars
Biting hard objectsIce, unpopped kernels, bones, pen caps
AgeCumulative stress over decades weakens tooth structure
Temperature extremesRapid hot-cold changes cause thermal stress
TraumaSports injuries, falls, accidents
Previous root canalEndodontically treated teeth are more brittle, especially without a crown

Protecting Your Teeth from Cracks

  • Wear a custom night guard if you grind your teeth
  • Wear a sports mouthguard during contact sports
  • Avoid chewing on ice, hard lollies, and non-food objects
  • Replace large old fillings with crowns before they fracture
  • Protect root-canal-treated teeth with a crown promptly

Ready to book? Contact Townsville Dental Clinic

Frequently Asked Questions

Can a cracked tooth be saved?
It depends on the type, location, and extent of the crack. Craze lines (superficial cracks in enamel only) require no treatment. A fractured cusp — where a piece of the chewing surface breaks off — can usually be repaired with a crown or onlay. A crack that extends from the chewing surface toward the root can often be saved with a crown if it has not reached below the gum line, and may also need root canal treatment if the pulp is involved. However, a tooth that has split completely in two or has a vertical root fracture generally cannot be saved and requires extraction. Early diagnosis is critical because cracks can worsen over time.
What are the different types of tooth cracks?
The American Association of Endodontists classifies tooth cracks into five types. Craze lines are tiny, superficial cracks in the outer enamel that are cosmetic only. A fractured cusp occurs when a piece of the chewing surface breaks off, usually around a large filling. A cracked tooth has a crack extending from the chewing surface vertically toward the root. A split tooth has separated into two distinct segments. A vertical root fracture starts at the root and extends upward, often with minimal symptoms until infection develops. Each type has a different prognosis and treatment approach, ranging from no treatment to extraction.
How do I know if my tooth is cracked?
Cracked tooth symptoms are often intermittent and can be difficult to pinpoint. Common signs include sharp pain when biting down that occurs upon release of the bite, sensitivity to cold or hot that is localised to one tooth, pain when eating that comes and goes, discomfort when biting on hard or crunchy foods, and intermittent pain that is hard to localise. Some cracks are visible as a line on the tooth surface, while others are invisible to the naked eye and require special diagnostic techniques such as transillumination (shining a bright light through the tooth), staining with methylene blue dye, or bite tests using a Tooth Slooth device.
What causes teeth to crack?
Teeth crack due to a combination of factors. Large existing fillings weaken the surrounding tooth structure, making it more susceptible to fracture. Biting on hard objects such as ice, unpopped popcorn kernels, or pens is a common trigger. Bruxism (teeth grinding) places sustained excessive force on teeth, particularly molars. Sudden temperature changes — such as eating hot food followed by ice water — can cause thermal stress. Age is also a factor, with cracks most common in patients over 40 whose teeth have accumulated years of biting forces and previous dental work.
How much does cracked tooth treatment cost in Townsville?
Treatment costs vary depending on the type of crack and the treatment required. A dental crown to restore a cracked tooth costs $1,200 to $1,800 at Townsville Dental Clinic. If root canal treatment is also needed, the combined cost is typically $2,100 to $3,300. A simple extraction costs $200 to $450, while a surgical extraction costs $350 to $600. Replacement options after extraction — such as a dental implant ($4,500 to $6,000) or bridge ($2,400 to $5,400) — add to the total cost. Most private health funds provide rebates for crowns and endodontic treatment. We provide a detailed treatment plan with costs before starting any work.

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