Acid Reflux (GERD) and Your Teeth: The Silent Cause of Enamel Erosion

Stomach acid sits at around pH 1.5 to 3.5 — strong enough to digest food, and far more acidic than a cola or citrus juice, both of which are already known to erode enamel. When that acid repeatedly reaches the mouth, as it does in gastroesophageal reflux disease (GERD), it can wear away tooth enamel from the inside out, often before the person has been diagnosed with reflux at all. Dentists frequently notice the pattern on an X-ray or exam before a patient's physician confirms GERD.

How Reflux Actually Damages Teeth

In GERD, the lower oesophageal sphincter does not close properly, letting stomach acid travel back up the oesophagus and, in more frequent or severe cases, reach the mouth. Unlike acid from food and drink, which mostly contacts the front and biting surfaces of teeth, reflux acid tends to pool around and behind the back teeth and the roof of the mouth, since it enters from below and behind during sleep or when lying down — which is why the erosion pattern from GERD looks different from erosion caused by diet.

The Telltale Pattern Dentists Look For

• Erosion on the inner (palatal/lingual) surfaces of the upper back teeth especially, rather than the outer surfaces facing the cheek.
• Smooth, glassy, or cupped-out enamel with a rounded rather than jagged appearance.
• Thinning that makes teeth look slightly more yellow as the underlying dentin shows through worn enamel.
• Increased sensitivity to hot, cold, or sweet foods as enamel thins.
• Erosion out of proportion to the patient's diet and brushing habits — when a dentist sees this kind of wear in someone who does not drink much soda or citrus, GERD becomes a likely explanation worth asking about.

Why This Often Shows Up at the Dentist First

Not everyone with GERD experiences classic heartburn — a condition sometimes called "silent reflux" can damage the oesophagus, throat, and teeth with minimal or no burning sensation. Since dental checkups happen more routinely than gastroenterology visits for most people, a dentist noticing this specific erosion pattern is sometimes the first clinical clue that prompts a referral for reflux evaluation.

What Can Be Done About the Dental Damage

• Managing the reflux itself: Working with a physician on diet changes, medication (like proton pump inhibitors), or lifestyle adjustments to reduce acid exposure is the foundation — dental treatment alone cannot fix ongoing erosion if the underlying cause continues.
• Fluoride treatment: High-concentration fluoride varnish or prescription fluoride toothpaste can help strengthen remaining enamel and reduce sensitivity.
• Avoiding brushing immediately after a reflux episode: Acid softens enamel temporarily, and brushing right after can physically scrub away weakened enamel. Rinsing with plain water, or a small amount of baking soda in water, and waiting about 30 minutes before brushing is the better sequence.
• Restorative treatment for significant wear: Bonding, crowns, or veneers may be needed once erosion has progressed enough to affect function or appearance, but these are typically only recommended once the reflux itself is under control, otherwise new restorations face the same acid exposure.

Everyday Habits That Help

Elevating the head of the bed slightly, avoiding lying down within two to three hours of eating, and reducing trigger foods (fatty meals, caffeine, alcohol, spicy food, chocolate) are standard reflux management steps that also reduce night-time acid exposure to the teeth, since GERD-related erosion tends to be worse in people who reflux while lying flat during sleep.