The Truth About Teeth Whitening: Myths vs. Facts

Kristin Watson
Whitening

Whitening products are everywhere, and so are claims about them. Here are some of the most common beliefs, and what is generally understood about each.

Myth: Whitening Works on Every Tooth

Whitening agents lighten natural enamel. They do not change the color of fillings, crowns, veneers or dentures, so a restoration at the front of the mouth can end up a different shade from the teeth around it.

Worth Knowing:
  • Ask whether any of your visible teeth have restorations before you start.
  • Some discoloration, such as from certain medications or an injury, responds poorly to whitening.
Myth: Whitening Damages Enamel

Products used as directed are generally considered safe for enamel. Temporary tooth sensitivity and gum irritation are the most common side effects, and they usually fade once treatment stops.

Worth Knowing:
  • Follow the product’s or your dentist’s instructions on how long and how often.
  • Stop and get advice if sensitivity is severe or does not settle.
Fact: Results Vary and Fade

How much lighter teeth become depends on their starting shade and the cause of staining, and color gradually returns as new stains build up. Nobody can promise a particular shade.

Worth Knowing:
  • Coffee, tea, red wine and tobacco all re-stain teeth over time.
  • A checkup first can rule out decay or gum problems that should be treated before whitening.
Final Thoughts

Whitening is cosmetic, not a health treatment. If you are considering it, a short conversation with your dentist about your teeth, your restorations and your expectations is a sensible first step.

This article is general information, not medical or dental advice, and it is not a substitute for an examination or advice from a qualified professional who knows your health history.