Unlike tooth decay, which is caused by bacteria, enamel erosion is a chemical process — acid directly dissolving the mineral structure of your enamel. And unlike many dental problems, it is largely diet-driven, meaning the choices you make every day are either protecting or slowly destroying the hardest substance in your body.
What is enamel and why does it matter?
Enamel is the outer layer of your tooth — a crystalline, mineralised shield that protects the softer dentine beneath. It has no living cells, which means your body cannot regenerate it once it’s lost. Erosion is cumulative and irreversible. What’s gone is gone.
As enamel thins, teeth become sensitive to temperature and sweet foods, appear more yellow as the underlying dentine shows through, develop a translucent or glassy appearance at the edges, and become increasingly vulnerable to chipping and decay.
The most erosive foods and drinks
Acid erosion occurs when the pH in your mouth drops below 5.5 — the critical threshold at which enamel begins to dissolve. The lower the pH, the more aggressive the erosion.
- Citrus fruits and juices — lemon, lime, orange and grapefruit juice are among the most erosive substances you can put in your mouth. Lemon juice has a pH of around 2.
- Soft drinks and energy drinks — both regular and diet varieties are highly acidic. Diet versions are no safer for enamel than their sugary counterparts.
- Sparkling water — mildly acidic due to carbonic acid. Less damaging than soft drinks but worth being aware of with frequent consumption.
- Vinegar-based foods — salad dressings, pickles and kombucha are more acidic than most people realise.
- Wine — both red and white wine are acidic, with white wine typically more erosive than red.
- Sports drinks — frequently consumed during exercise when saliva flow is reduced, compounding their erosive effect.
How eating patterns matter as much as what you eat
The frequency of acid exposure is often more damaging than the total quantity consumed. Sipping a soft drink over two hours exposes your teeth to sustained acid attack. Drinking it in ten minutes and rinsing with water is significantly less damaging. Similarly, holding juice in your mouth, swishing drinks, or drinking acidic beverages last thing at night when saliva flow drops dramatically all accelerate erosion.
The role of saliva
Saliva is your mouth’s natural defence against acid. It neutralises acid, remineralises softened enamel, and buffers pH back toward neutral. This process takes approximately 30 to 60 minutes after an acid challenge — which is why brushing immediately after acidic food or drink actually causes more damage, not less. You are brushing softened, temporarily vulnerable enamel.
How Tooronga Family Dentistry identifies and manages enamel erosion
Early erosion is often invisible to patients but detectable clinically. At our practice in Glen Iris we assess enamel wear at every check-up, mapping changes over time to catch erosion before it becomes symptomatic.
Treatment and prevention options we offer:
- Fluoride treatments: High-concentration fluoride applied in-chair strengthens and remineralises enamel, making it more resistant to future acid attack.
- Fissure sealants and bonding: Where erosion has created sensitivity or structural vulnerability, tooth-coloured bonding can protect exposed dentine and restore contour.
- Dietary counselling: We help patients across Malvern, Hawthorn, Hawthorn East and Ashburton identify their specific dietary acid load and make targeted, realistic changes.
- Custom mouthguards: For patients who also grind their teeth, the combination of erosion and grinding accelerates tooth loss significantly. A custom occlusal splint protects what remains.
- Monitoring and photography: We photograph and document erosion patterns so that progression — or stabilisation — can be tracked accurately over time.
Practical steps to protect your enamel today
- Finish acidic meals with cheese or plain milk — both neutralise acid and promote remineralisation
- Drink acidic beverages through a straw to reduce contact with teeth
- Rinse with plain water immediately after acidic food or drink
- Wait at least 30 minutes before brushing after acid exposure
- Use a low-abrasion fluoride toothpaste — avoid harsh whitening toothpastes if erosion is already present
- Chew sugar-free gum after meals to stimulate saliva flow
- Stay well hydrated — a dry mouth has no acid buffer
Noticing sensitivity, transparency at the edges of your teeth, or a change in their appearance? These are early signs of enamel erosion. Call or book online Tooronga Family Dentistry on (03) 9822 7006 — we see patients from Glen Iris, Malvern, Hawthorn, Hawthorn East and Ashburton.