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What worn teeth can—and cannot—tell you
Tooth wear is an outcome, not a diagnosis. The main processes are erosion, attrition, and abrasion. They can occur together, so a particular look or pattern is a clue for a dentist to assess, not a reliable way to diagnose yourself.
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- Erosion: Chemical dissolution of dental tissue by acid, without bacterial involvement. The American Dental Association (ADA) defines it as “the progressive and irreversible loss of dental hard tissue caused by a chemical process of acid dissolution that does not involve bacteria.”
- Attrition: Wear where teeth repeatedly contact one another, often through clenching or grinding.
- Abrasion: Mechanical wear caused by contact with an external object or material.
Possible signs include teeth that look thinner, shorter, shinier, yellowish, chipped, or more sensitive. These signs can have different explanations, and sensitivity or visible damage merits dental assessment rather than guesswork.
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Acidic foods and drinks
Frequent acid exposure from foods and drinks can contribute to erosion. The ADA notes that not only the source of acid but also how often it is consumed, the pattern of consumption, and how long it contacts teeth matter. Its Nutrition and Oral Health guidance discusses dietary acids and erosion.
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Dental erosion is chemical rather than bacterial damage. The ADA’s 2018 panel report on dental erosion describes dietary erosion as commonly affecting facial and chewing surfaces. That distribution is a clinical clue, not a home diagnostic test.
Reflux or frequent vomiting
Stomach acid can reach the teeth through reflux or frequent vomiting and contribute to erosion. Gastric-acid erosion may affect inner surfaces of upper front teeth as well as other chewing or cheek-facing surfaces. A dentist can consider those patterns alongside your history; tooth shape by itself does not establish reflux or another cause.
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Clenching and grinding
Grinding can happen while awake or asleep, and a person may not notice it. The NHS lists worn or broken teeth and increased sensitivity among possible signs, along with jaw pain, headaches, and earache. The ADA’s Teeth Grinding page reports that more than 70% of dentists noticed signs of grinding and clenching in their patients in a 2021 survey. That is what dentists reported noticing in their patients—not an estimate that more than 70% of the public grinds their teeth.
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Mechanical abrasion
Repeated mechanical contact can wear tooth surfaces too. The NHS Mouth Care Matters guide covers tooth surface loss through erosion, attrition, and abrasion, and notes that thinning, shininess, shorter-looking teeth, and sensitivity can be signs. These appearances do not, on their own, reveal which process is responsible.
What to do if you notice wear
Arrange a dental assessment if wear is persistent, teeth are chipped or visibly damaged, sensitivity continues, or you have grinding-related tooth damage. A dentist can examine the surfaces, ask about acid exposure and grinding, and assess whether the wear appears stable or is progressing. If you have painful or persistent symptoms, seek dental advice.
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Bring useful context to the appointment: when you first noticed the change, whether sensitivity or pain is present, and whether you experience clenching, grinding, reflux, frequent vomiting, or frequent acidic food and drink exposure. This history can help guide assessment, but it does not replace the examination.
Can worn-down teeth be rebuilt?
Enamel that has been lost does not grow back. Toothpaste or changes to habits may help reduce further damage in some circumstances, but they cannot regenerate missing enamel. Restoration is a separate step: depending on how much structure is missing, which teeth and surfaces are affected, symptoms, and each tooth’s condition, a dentist may consider fillings, crowns, or veneers. Root canal treatment or extraction may be discussed in more severe circumstances. These are clinical options, not a ranking or a prediction of what any one person will need.
Managing the cause versus restoring the tooth
| Approach | Purpose | What it does not do |
|---|---|---|
| Address contributing exposures and monitor wear | Reduce or manage the factors identified in the clinical history and track whether wear is stable or progressing. | It does not replace tooth structure that has already been lost. |
| Dentist-selected restoration | Rebuild or cover damaged areas; options may include fillings, crowns, and veneers. | No single procedure is suitable for everyone; selection depends on the damage and the condition of each tooth. |
Addressing causes and monitoring can help limit ongoing risk and may avoid unnecessary restorative work. The two approaches can also be used together: restoring a tooth does not, by itself, remove the exposure or habit that contributed to the wear.
What a night guard can and cannot do
For suitable grinding cases, a dentist may recommend a fitted night mouth guard or splint to protect teeth. The NHS notes that treatment for bruxism is not always needed. A guard is protective, not restorative: it cannot replace lost tooth structure or determine why grinding is happening. If your teeth are damaged or sensitive, ask a dentist about assessment and appliance fit rather than assuming an online product is interchangeable with a dentist-recommended appliance. Leeds Teaching Hospitals NHS Trust explains clenching and grinding in its bruxism guidance.
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