Teeth whitening brightens your teeth by dealing with the stains and pigments that build up on and inside the enamel. They come from everyday things: tea, coffee, dark drinks, smoking, and simply getting older, which makes the inner tooth look darker. This article explains how whitening works, the options you have, and what to watch out for so it is done safely.
How whitening agents work
Two agents are in common use.
- Hydrogen peroxide releases oxygen quickly, so it breaks down stains fast. It is used at higher concentrations for in-office whitening.
- Carbamide peroxide breaks down slowly into hydrogen peroxide. It works more gently, which makes it the usual choice for home kits.
The gel passes through the enamel, and the oxygen reacts with the pigment molecules inside the tooth so they lose their color. At the right concentration and under a dentist's supervision, this brightens the tooth without damaging its structure. Some people get temporary sensitivity, which settles on its own.
The whitening options
There are three routes. They differ in the strength of the gel, how quickly you see a change, and who is looking after you.
In-office whitening. We examine your teeth first, protect your gums and lips, and apply a high-concentration gel to the teeth. A light may be used to help the reaction along. You see the change in a single visit. It is the fastest route, and the safest, because a dentist controls every step.
A dentist-made home kit. We scan your teeth and make trays that fit you exactly, and give you a lower-concentration gel to wear at home for the time we recommend. The change is gradual and gentler, and the same kit is useful later for topping up after in-office whitening.
Over-the-counter products. Whitening strips, whitening toothpaste, and mouthwash contain small amounts of whitening agent, so the effect is slow and limited. They suit surface stains rather than a real change in tooth shade, and a one-size tray that does not fit can let the gel onto your gums.
Things to consider before whitening
Whitening is safe for most people, but in some situations you should see us first.
- Sensitive teeth already. Whitening can make sensitivity worse for a while. We may suggest a lower concentration or prepare the teeth first.
- Decay or inflamed gums. These need treating first. Otherwise the gel can get into a cavity and hurt.
- Fillings, crowns, or veneers. Whitening does not change the color of these materials. Your natural teeth get lighter and the restorations stay as they were, so the result can look uneven unless we plan for it.
- Heavy tartar or staining. We recommend a scaling and polish first so the gel reaches the whole tooth surface and the result is even.
- Pregnancy or breastfeeding. We generally suggest waiting.
Everyone's teeth start from a different shade and respond differently. Stains from food and smoking usually respond well. Color that comes from inside the tooth, such as a tooth that has had root canal treatment or marks from certain medicines taken in childhood, may lighten only so far. We tell you what to expect before we start.
Prices
- In-office teeth whitening: 4,900 to 6,500 baht
These are starting prices. We confirm the exact fee after examining your teeth. See the teeth whitening page and the price list.
Keeping your teeth white afterwards
- For the first few days after whitening, avoid tea, coffee, dark sodas, dark red drinks, and strongly colored food. Teeth pick up stain very easily during this time.
- Do not smoke. It is the fastest way to bring the color back.
- If your teeth feel sensitive, use a sensitivity toothpaste for a while. It usually passes within a few days.
- Brush twice a day and floss daily.
- Regular cleanings and check-ups keep the result for longer.
- When the shade starts to fade, top it up with a home kit or a repeat in-office session.
Book a consultation
If you would like brighter teeth but are not sure whether whitening will work for you, or which route suits you, come in for a check first. We look at your current shade, check whether anything needs treating beforehand, and give you an honest idea of what to expect.
- LINE
- Phone: 098 831 0246
- Open daily 10:00–20:00 (closed Tuesdays)
- Tooth Boutique Dental Clinic, Venice Di Iris, Vacharapol Road, Bang Khen, Bangkok. Parking available.