What Is Tooth Erosion and How to Prevent It
Tooth erosion is the irreversible loss of tooth structure caused by chemical dissolution from acids that are not of bacterial origin — dietary acids such as soft drinks and citrus, or stomach acid. Enamel contains no living cells, so once it dissolves the body cannot regenerate it, and the softer dentin underneath becomes exposed, bringing sensitivity and discolouration. Sensitivity to hot or cold is often the first noticeable sign, and it is worth having assessed before more enamel is lost.
Orion Dental Team
Led by Dr. Fahimay Naqvi
Tooth erosion is defined as the irreversible loss of tooth structure due to chemical dissolution by acids not of bacterial origin. Unlike cavities — which are caused by bacteria — erosion results from direct acid exposure that gradually dissolves your enamel, the protective outer layer of your teeth.
Your enamel is the hardest substance in the human body, but it has one critical vulnerability: it cannot repair itself. Once enamel is gone, it is gone for good. At Orion Dental in Scarborough and Milton, we help patients identify erosion early and take steps to prevent further damage.
None
natural enamel regrowth
pH < 5.5
acid level that erodes enamel
30 min
wait before brushing after acid
Major
cause: acidic beverages
Understanding Tooth Enamel
Enamel is the thin, translucent outer layer that covers the crown of each tooth. Despite being incredibly hard, it is also brittle — it can chip, crack, and most importantly, dissolve when repeatedly exposed to acids. What makes enamel unique is that it contains no living cells, which means your body cannot regenerate it the way it heals bone or skin.
Beneath the enamel sits dentin — a softer, yellowish layer that contains millions of microscopic tubules leading to the nerve centre of the tooth. When enamel erodes, dentin becomes exposed, leading to sensitivity, discolouration, and a higher risk of cavities and fractures.
How Erosion Progresses
Demineralisation
Surface softening — may be reversible
Early Erosion
Enamel thinning, slight transparency
Moderate Erosion
Sensitivity, dentin exposure
Severe Erosion
Structural damage, tooth weakening
Warning Signs of Tooth Erosion
Erosion develops gradually, so the early signs are easy to overlook. Here is what to watch for:
Signs to Watch For
- Increased sensitivity to hot, cold, sweet, or acidic foods and drinks
- Teeth that appear more yellow as dentin shows through thinning enamel
- Rounded or transparent-looking edges on the front teeth
- Small dents or cupping on the chewing surfaces of molars
- Cracks, chips, or roughness along the tooth edges
- Fillings that appear to "rise above" the surrounding tooth surface
Do Not Ignore Sensitivity
Tooth sensitivity is often the first noticeable sign of erosion. If hot or cold drinks cause a sharp reaction, schedule a dental checkup so your dentist can assess the enamel and recommend protective measures before more damage occurs.
What Causes Tooth Erosion?
Erosion occurs when acids come into repeated contact with your enamel. The sources of these acids fall into two main categories:
| Source Type | Examples | How It Erodes |
|---|---|---|
| Dietary acids (extrinsic) | Soft drinks, citrus juice, wine, energy drinks, vinegar | Direct acid contact dissolves enamel with each exposure |
| Stomach acids (intrinsic) | GERD, acid reflux, morning sickness, eating disorders | Hydrochloric acid from the stomach is extremely erosive |
| Environmental / behavioural | Dry mouth (medication side effect), teeth grinding, swimming in chlorinated pools | Reduces saliva's protective buffering or adds mechanical stress |
The Role of Acidic Beverages
Soft drinks are one of the most significant contributors to erosion. Both regular and diet varieties contain phosphoric acid and citric acid, which lower the pH in your mouth well below the critical threshold of 5.5. Frequent sipping throughout the day — rather than drinking at mealtimes — dramatically increases exposure time and accelerates enamel loss.
Dry Mouth and Reduced Saliva
Saliva is your mouth's natural defence against acid. It dilutes acids, buffers pH changes, and delivers minerals that help remineralise enamel. Conditions or medications that cause dry mouth (xerostomia) reduce this protection significantly, making teeth more vulnerable to erosion.
Teeth Grinding (Bruxism)
While grinding is a mechanical rather than chemical process, it accelerates enamel loss — especially when combined with acid erosion. Weakened enamel wears away faster under grinding forces. A custom night guard can help protect teeth from this combined damage.
Worried About Your Enamel?
A dental checkup can identify early signs of erosion and help you take protective action.
How to Prevent Tooth Erosion
Since enamel cannot regenerate, prevention is the key strategy. The good news is that most erosion is preventable with simple daily habits:
Limit Acidic Beverages
Reduce consumption of soft drinks, energy drinks, and citrus juices. When you do consume them, drink through a straw to minimise contact with teeth.
Wait Before Brushing
After consuming acidic foods or drinks, wait at least 30 minutes before brushing. Rinse with water or a fluoride mouthwash in the meantime.
Use Fluoride Products
Brush with fluoride toothpaste and consider a fluoride rinse. Fluoride strengthens enamel and supports remineralisation of early-stage damage.
Eat Protective Foods
Dairy products (cheese, milk, yogurt) contain calcium and phosphates that help neutralise acids and remineralise enamel.
Stay Hydrated
Drink plenty of water throughout the day to stimulate saliva production and rinse acids from your teeth.
Address Grinding
If you clench or grind your teeth, a custom night guard prevents mechanical enamel wear that compounds acid damage.
Professional Fluoride Treatments
In-office fluoride treatments provide a higher concentration of fluoride than over-the-counter products. Your dentist may recommend these during your regular checkup if early signs of erosion are present.
How Eroded Teeth Are Treated
When erosion has already occurred, treatment focuses on protecting the remaining tooth structure and restoring function and appearance:
Treatment Approaches by Severity
Fluoride & Remineralisation
For early-stage demineralisation, professional fluoride varnishes and remineralising agents can strengthen weakened enamel before visible damage occurs.
Dental Bonding
Tooth-coloured composite resin is applied to protect exposed dentin and restore the tooth's shape. A minimally invasive option for moderate erosion.
Porcelain Veneers
For front teeth with significant erosion affecting appearance, veneers provide a durable, natural-looking cover that protects and beautifies.
Dental Crowns
When erosion has compromised a tooth's structural integrity, a crown encases the entire visible portion, restoring strength and preventing further damage.
Protect Your Enamel — Starting Today
Tooth erosion is a slow process, which means you have time to intervene — but only if you start now. Small changes to your diet and oral care routine can make a significant difference. Our team at Orion Dental provides comprehensive checkups, dental sealants, and cosmetic restorations to help you preserve and protect your teeth.
Book a checkup at our Scarborough or Milton office. Book an appointment or call 416-291-0306 (Scarborough) / 905-636-9770 (Milton).
Frequently Asked Questions
Common questions about tooth erosion
What is tooth erosion?
Tooth erosion is the irreversible loss of tooth enamel caused by chemical dissolution from acids — not from bacteria. Unlike cavities (which are bacterial), erosion is caused by dietary acids, stomach acids, or environmental factors that gradually dissolve the enamel surface.
Can tooth enamel grow back after erosion?
No. Enamel does not contain living cells and cannot regenerate once lost. However, early-stage demineralisation (before visible erosion) can sometimes be reversed with fluoride treatments and remineralising products. Prevention is essential.
What drinks cause the most tooth erosion?
Soft drinks (both regular and diet), energy drinks, sports drinks, citrus juices, and wine are among the most erosive beverages. Their high acid content — particularly phosphoric and citric acid — dissolves enamel over time.
Should I brush my teeth right after eating acidic foods?
No. Brushing immediately after acid exposure can actually spread the acid and accelerate enamel wear. Wait at least 30 minutes, then brush gently. In the meantime, rinsing with plain water or a fluoride mouthwash helps neutralise the acid.
How does tooth erosion differ from a cavity?
Cavities are caused by bacteria that produce acid as they feed on sugars, creating localised holes. Erosion is caused by direct acid contact (from food, drinks, or stomach acid) and affects broader areas of the tooth surface rather than creating isolated holes.
Can tooth erosion cause sensitivity?
Yes. As enamel thins, the underlying dentin — which contains microscopic nerve channels — becomes exposed. This leads to sensitivity to hot, cold, sweet, and acidic foods and drinks.
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