Why Do My Teeth Keep Breaking?
25/03/2026
Many patients are surprised when a tooth suddenly breaks, especially if they brush regularly and don’t feel pain.
In reality, teeth often weaken gradually over time before finally fracturing.
Common reasons teeth break include:
- Large fillings – When a tooth has had multiple fillings over the years, much of the natural tooth structure has already been removed. This leaves the remaining enamel walls thinner and more prone to fracture.
- Root canal treated teeth – Teeth that have had root canal treatment no longer have a blood supply, which can make them more brittle over time.
- Teeth grinding (bruxism) – Grinding places enormous pressure on teeth, particularly at night when patients are unaware it is happening.
- Age and wear – Teeth naturally become weaker after decades of chewing and repair.
Often dentists recommend crowns for these teeth. A crown covers and protects the remaining structure, significantly reducing the risk of further fracture.
If you have heavily filled teeth, regular examinations and x-rays help identify when a tooth may need protection before it breaks.
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