Tooth Erosion: How Soft Drinks, Sports Drinks and Reflux Wear Away Enamel
- Star Light Dental
- April 23, 2026
- [email protected]
Tooth decay gets all the attention, but a growing share of the damage dentists see has nothing to do with bacteria. It is erosion: acid from food, drink or the stomach dissolving the enamel directly. It happens to people with spotless oral hygiene, and because it is painless at first, most do not notice until a lot of enamel has gone.
Enamel does not grow back. The good news is that erosion is almost entirely preventable once you know where the acid is coming from.
1. Erosion Is Not the Same as Decay
Decay happens when bacteria turn sugar into acid in one spot, creating a cavity. Erosion is a chemical process that needs no bacteria and no sugar. Any liquid below about pH 5.5 begins to soften enamel on contact, and it affects whole surfaces of the teeth rather than a single hole.
This is why sugar-free and diet soft drinks are not safe for teeth. They are just as acidic as the regular versions.
2. Where the Acid Comes From
- Soft drinks and energy drinks, regular or sugar free.
- Sports drinks. They are acidic, and they are usually sipped slowly with a dry mouth, which is the worst combination.
- Fruit juice, kombucha, flavoured sparkling water and wine.
- Citrus fruit, vinegar-based dressings and sucking on lemon or lime wedges.
- Stomach acid from reflux, frequent vomiting or morning sickness. Reflux can be silent, and sometimes worn teeth are the first sign.
- A dry mouth, because saliva is the natural defence against acid.
3. The Early Signs
- Teeth that look more yellow, as the darker dentine shows through thinning enamel.
- A smooth, glassy or polished look, with the fine surface texture gone.
- Front teeth that look see-through or grey along the biting edge.
- Small dents or cupping on the chewing surfaces of back teeth.
- Fillings that seem to stand up above the tooth around them.
- Sensitivity to cold, hot or sweet, and edges that chip easily.
4. Habits That Stop It
- Make water your main drink, and keep acidic drinks to mealtimes.
- Drink them in one go rather than sipping for an hour, and do not swish them around your mouth.
- Use a straw positioned towards the back of the mouth.
- Rinse with water afterwards, or finish with milk or cheese.
- Chew sugar-free gum to get saliva flowing.
- Do not brush for 30 to 60 minutes after anything acidic. Softened enamel scrubs away easily.
- Use a soft brush and a fluoride toothpaste, and spit without rinsing.
5. Sport, Kids and Teenagers
For most training sessions and games lasting under an hour, water is all the body needs. Sports drinks were designed for endurance events, not for the sideline at under-10s soccer. Teenagers are the heaviest consumers of energy and soft drinks, and erosion that starts at fifteen has sixty years to get worse.
If reflux or frequent vomiting might be involved, see your GP. Treating the cause protects far more than your teeth.
6. Can Erosion Be Repaired?
Lost enamel cannot be regrown, but the damage can be stopped and the teeth protected. Depending on how far it has gone, that may mean high-strength fluoride and desensitising treatments, tooth-coloured bonding to cover exposed dentine and rebuild worn edges, or veneers and crowns where the wear is severe. The earlier erosion is picked up, the simpler and cheaper the fix.
Worried Your Teeth Look Worn?
We check for erosion at every check-up and can usually tell from the pattern of wear where the acid is coming from. Call Star Light Dental in Prestons on (02) 9432 2833 or book online.