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Even without sugar: what acidic drinks do to tooth enamel

Sugar-free does not automatically mean gentle on teeth. How acids work, the difference drinking habits make and why sparkling water is not the same as a soft drink.

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AI illustration of fruit juice and waterAI-generated
AI-generated illustration for guidance; not a patient case.

A sugar-free soft drink can still affect teeth. The reason is its acidity: it can dissolve minerals from the tooth surface. Dental professionals call this chemical loss of hard tooth tissue erosion. Decay-causing bacteria do not need to be involved. Tooth structure that has already been lost does not grow back. American Dental Association: Dental Erosion

This does not mean every glass of juice leaves visible damage. In everyday life, it is worth looking more closely at the drink, how often you have it and how you drink it.

01 Is erosion the same as tooth decay?

In tooth decay, bacteria in dental plaque turn sugar into acids. These attack the tooth structure. Saliva and fluoride support protection and the replacement of minerals. Very frequent sugar intake can, however, disturb the balance. KZBV: Wie entsteht Karies?

With erosion, by contrast, acid comes into direct contact with teeth, for example from drinks or repeated reflux of stomach acid. “Sugar-free” therefore describes only part of a drink’s properties. It says nothing about its acid content. American Dental Association: Dental Erosion

02 Why does the way you drink make a difference?

Sipping an acidic drink over several hours repeatedly exposes teeth to acid. This can be less favourable than drinking it within a limited period. Holding a drink in the mouth or swishing it around further prolongs contact. Landeszahnärztekammer Baden-Württemberg: Patient aktuell, issue 1/2023

In practice, this means having acidic drinks with a meal, choosing water between meals and rinsing your mouth with water after acidic food or drinks. The focus is on recurring habits, not banning individual foods. American Dental Association: Dental Erosion

Start by observing an ordinary day: What is on your desk? How long does a drink last during a car journey? Do you add lemon every time you refill your water bottle? Such concrete examples are more useful in the conversation than the general impression “I usually drink healthily”.

03 Is carbonated mineral water a problem?

Plain, unsweetened sparkling water is not equivalent to an acidic soft drink. The American Dental Association generally considers it a suitable alternative. With flavoured varieties, it is worth checking the additions: citrus ingredients or other acids change the drink. If it contains sugar, that adds another factor. The word “water” alone does not answer these questions. ADA MouthHealthy: Sparkling Water

04 How can you tell whether an examination would be useful?

Erosion may initially go unnoticed. Sensitivity or changes in tooth shape can be reasons to examine the surfaces more closely. Frequent heartburn also belongs in the conversation, because acid does not have to come only from food and drink. An examination and your personal history help distinguish possible causes. American Dental Association: Dental Erosion

Regular brushing with fluoride toothpaste remains important. If surfaces are already affected, care should be tailored individually. You are welcome to bring details of drinks you often have and the toothpaste you use. Landeszahnärztekammer Baden-Württemberg: Patient aktuell

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We assess what is appropriate for you based on your situation and an examination.

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