Understanding Enamel Erosion

Enamel erosion is the chemical loss of tooth mineral caused by acids (not bacteria). Over time, repeated acid exposure softens and dissolves enamel, and once enamel is gone it doesn’t grow back. Prevention and early detection matter.

How does enamel erosion happen?

When acids (found in many foods and drinks) come into contact with teeth, they pull minerals like calcium and phosphate out of the enamel. This leaves it temporarily softened. If this happens often, especially alongside mechanical forces like toothbrushing or grinding, the previously softened enamel is then more easily worn away. This is also known as “erosive tooth wear,” because erosion often combines with abrasion/attrition.

Common causes of enamel erosion

1) Dietary (extrinsic) acids

These are the most common contributors in many people:

  • Soft drinks including energy drinks and sports drinks
  • Citrus fruits/juices, vinegar-based foods and acidic “healthy” drinks
  • Frequent snacking/sipping (acid frequency matters as much as acid strength)

In 2021, an in-vitro study found multiple energy drinks produced measurable enamel erosion under experimental conditions. [1]
A recent systematic review also examined sports drink intake and its association with dental erosion. [2]

2) Stomach acid (intrinsic acids)

Stomach acid is very strong and whilst it isn’t always present, it can erode enamel through:

  • Gastro-oesophageal reflux (GERD) – a chronic condition where stomach acid frequently flows back up into the oesophagus (the tube connecting your mouth to your stomach. This acid has a pH around 2 which is classed as “highly acidic” and does gradually wear away the enamel, particularly around the back and upper teeth.
  • Frequent vomiting (this can happen due to some eating disorders or medical conditions). Again, vomit is highly acidic and has detrimental effects on your enamel and oral health.

A recent review published in PMC reviews the strong connection between gastroesophageal reflux disease (GERD) and erosive tooth wear (ETW) and emphasises the importance of early diagnosis and interdisciplinary management. This involves medical and dental professionals, lifestyle and dietary changes, preventive oral care, and emerging technologies (such as artificial intelligence-assisted diagnostics and teledentistry) to detect and manage ETW more effectively. [3]

 

3) Reduced protective factors

Your mouth has built-in protection from acid; namely, saliva. Saliva has a complex make up despite being 99% water as other the 1% contains a beneficial compound of enzymes, electrolytes, mucus, antibacterial compounds, and various proteins that protect oral health.

Saliva helps to neutralize acids and remineralize enamel, but it can only do so much. Keeping acidic intake to a minimum is important, especially if you have low saliva flow (some medications, health conditions or dehydration increase this risk).

Symptoms and early warning signs of enamel erosion

Enamel erosion can be subtle at first but once it starts it’s very hard to pull back without help. Watch for:

  • Sensitivity to cold, hot, or sweet foods/drinks
  • Smooth, shiny areas on your teeth (the enamel may look “glazed”)
  • Yellowing (dentin (the hard tissue that makes up your teeth) shows through as the enamel thins)
  • Rounded edges or “cupping” on the chewing surfaces
  • More translucent tooth edges, especially on front teeth
  • Fillings that look raised compared to surrounding tooth surface

If you suspect you have enamel erosion, get it checked. Enamel erosion can be addressed but it takes a multi-faceted approach.

Preventing enamel erosion: what actually works

1) Reduce acid frequency

You don’t need to cut out everything that may contain acid (that would be quite hard), but reduce the amount of acid you intake.

  • Keep drinks you know are acidic (such as fizzy drinks, coffee, fruit juices) with meals, not sipped all afternoon. Eating helps as it increases saliva production and the food also helps to buffer the acid coming in, absorbing some of the acid and diluting its effect on the teeth.
  • If you do have an acidic drink without a meal, finish it in one go rather than sipping. Give your teeth and mouth a break afterwards; they need recovery time of around 60 minutes between intake to allow for remineralization of the tooth enamel and for your mouth to return to a neutral pH. Don’t keep sipping or have another drink/food straight after.
  • Use a straw (aiming the liquid past the teeth) when appropriate. This can help to minimize contact between the acidic drink and your teeth, which can reduce enamel erosion. However, the straw must be positioned properly so the liquid doesn’t wash all over your teeth, which would defeat the purpose of using the straw.

2) Rinse, don’t brush immediately after acids

After consuming acidic food/drink or vomiting/suffering reflux, it’s important to take steps to protect your teeth.

  • Rinse with water – water is generally neutral at an average of pH 7 (different areas will vary with tap water quality). You can also use bottled water although the same applies.
  • Wait before brushing (common advice is between 30–60 minutes) so the enamel softened by the acid isn’t scrubbed away.

3) Manage reflux risk

If you have think you have reflux (generally noticed by frequent heartburn, sour taste, or feeling vomit come into your mouth), it’s important not only for your teeth but your overall health to get it checked out. Discuss your symptoms with a medical professional to try to manage and reduce reflux becoming a problem for your enamel.

4) Drink well to stay hydrated

If you don’t drink enough and become hydrated, this can lead to both low saliva flow and nausea, which in turn can lead to vomiting episodes.

Make sure to stay hydrated; you could try sugar-free gum to stimulate saliva production if you feel it would help.

Early intervention

To summarise: if you have any of the following symptoms, you may be suffering from enamel erosion:

  • New or worsening sensitivity to hot, cold, sweet, or acidic foods and drinks
  • Visible thinning, yellowing, or chipping of your teeth
  • A history of high acid intake (frequent consumption of acidic foods or drinks) or medical conditions involving reflux or vomiting
  • Concern that your tooth shape is changing – for example, teeth appearing shorter, edges looking more transparent or rounded, or the biting surfaces becoming smoother or developing small dents

Early intervention often focuses on risk reduction and monitoring, meaning you can save yourself the heartache of more serious tooth problems down the line. Catching enamel erosion in its early stages allows your dentist to help you identify and modify the causes before significant damage occurs.

The key advantage of early detection is that while enamel cannot regenerate once it’s lost, you can halt or slow further erosion and protect what remains. Your dentist can also monitor the progression over time through regular check-ups, taking photographs or measurements to track any changes. If you wait until the damage is severe, you may need more invasive and costly treatments like crowns, veneers, or even root canals if the erosion reaches the inner layers of the tooth.

If you notice any of these warning signs, it’s worth scheduling a dental appointment sooner rather than later. Prevention and early management are always easier, less expensive, and less uncomfortable than treating advanced dental problems.

Clinical guidance

Resources

[1] PMC: Influence of energy drinks on enamel erosion: In vitro study using different assessment techniques (2021)

[2] Springer Nature Link: Evidence from a Systematic Review (2025)

[3] PMC: Erosive Tooth Wear and Gastroesophageal Reflux Disease: An Interdisciplinary Management for a Relevant Dental Problem (2025)