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Laser teeth whitening in Bangkok costs about 6,800 to 10,000 THB in dental clinics. A whitening gel is applied to your teeth and a laser is used to activate it, in a single visit of roughly an hour.
The Smile Bar doesn’t offer laser whitening. We do teeth whitening in Bangkok with an LED lamp, from 2,399 THB. This guide explains what laser whitening is, what it costs here, what studies say about laser vs LED, and how to choose.
In short
- Price: 6,800 to 10,000 THB in Bangkok dental clinics. Promotions sit around 6,800 to 7,900 THB.
- “Laser” is used loosely. Some clinics and directories file LED systems such as Zoom under “laser whitening”.
- The gel does the whitening. Reviews of clinical trials have not shown that a laser gives a whiter result than other lights.
- LED at The Smile Bar: 20-minute sessions, 2,399, 4,399 or 5,799 THB.
Laser vs LED vs Zoom whitening at a glance
| Laser whitening | Zoom (Philips) | LED at The Smile Bar | |
|---|---|---|---|
| Light | Laser, usually a diode laser | LED lamp | UV-free LED lamp |
| Where | Dental clinics | Dental clinics and hospitals | Whitening studio, Siam Square |
| Time to plan | About 60 to 90 minutes | 45 to 60 minutes, plus the check-up | About 30, 60 or 90 minutes |
| Price in Bangkok | 6,800 to 10,000 THB | 7,500 to 12,000 THB | 2,399, 4,399 or 5,799 THB |
| What whitens the teeth | The gel | The gel | The gel |
For Zoom in detail, with prices clinic by clinic, see Zoom teeth whitening in Thailand.
The Smile Bar uses LED lamps, not lasers.
What is laser teeth whitening?
It’s an in-clinic whitening treatment. A peroxide gel is applied to the teeth, and a laser beam is passed over it to activate the gel.
What clinics mean by “laser”
The word is used in two ways, and it’s worth asking which one you’re being sold.
| What the ad says | What it may be |
|---|---|
| Laser whitening | A real dental laser, used by a dentist |
| Laser whitening, Zoom | Zoom, which uses an LED lamp, not a laser |
| Cool light, blue light, LED | An LED lamp |
Which lasers are used
- Diode lasers are by far the most common in whitening studies.
- KTP and erbium lasers are used in some clinics.
How much does laser teeth whitening cost in Bangkok?
Prices published by clinics and directories, checked on 13 October 2026:
| Source | Published price | Good to know |
|---|---|---|
| Dr. Sunil Dental | 6,800 THB | Cleaning is 1,800 THB extra |
| Bangkok Smile Dental | 7,500 THB | Promotion. List price 10,000 THB |
| Clinic listings on WhatClinic | 7,200 to 10,000 THB | “From” prices |
| Bookimed | From 6,800 THB | Directory price |
Several large clinics don’t publish a laser price at all: you have to ask.
What the price may not include
- The check-up before whitening
- A cleaning, often 1,000 to 2,000 THB more
- A take-home kit
- Any treatment needed first, such as a filling
What happens during a laser whitening session
- Check-up. A dentist checks your teeth and gums.
- Protection. Your gums and lips are covered. You wear protective glasses.
- Gel. The whitening gel is applied to the teeth.
- Laser. The dentist passes the laser over the gel, tooth by tooth or by section.
- Repeat and rinse. The cycle may be repeated before the gel is removed.
Clinics describe sessions of 45 to 90 minutes.
Does laser whitening work better than LED? What studies say
| Review | What it looked at | What it found |
|---|---|---|
| 2018 | 21 clinical trials of in-clinic whitening with and without light | Light did not change how well whitening worked |
| 2020 | 6 clinical trials comparing laser with other lights | Laser did not increase the colour change, and did not reduce sensitivity |
| 2024 | 28 earlier reviews | No significant difference in colour change between techniques |
In plain words: the gel does the work, whatever shines on it. These studies looked at whitening done in dental clinics. They don’t prove that one lamp is better or gentler than another, and that includes ours.
So the real differences between laser and LED are practical: where it’s done, how long it takes and what it costs.
Is laser teeth whitening safe? Sensitivity and side effects
- Sensitivity is the most common side effect of any peroxide whitening. It’s usually temporary.
- Gums can be irritated if gel touches them.
- Studies disagree on whether light or laser makes sensitivity better or worse.
- Tell the clinic if your teeth are already sensitive.
Read more in does teeth whitening hurt? and is teeth whitening safe?
When to see a dentist first
- You have a toothache, a cavity or bleeding gums.
- One tooth is much darker than the others.
- You have crowns, veneers or fillings on your front teeth: they won’t change colour.
Laser or LED: which one fits your trip?
| If you… | Consider |
|---|---|
| are already having dental work in a clinic | Laser or Zoom in the same clinic |
| want a full dental check-up at the same time | A dental clinic |
| have stains from coffee, tea, wine or smoking | Either. LED costs less |
| have 30 minutes between two plans | A Single LED session |
| want a fixed price you can check online | LED at The Smile Bar |
| have discolouration from inside the tooth | A dental opinion first |
Questions to ask a clinic before booking laser whitening
- Is it a real laser, or an LED lamp such as Zoom?
- What does the price include: check-up, cleaning, take-home kit?
- Is this a promotional price, and until when?
- How long will I be in the chair?
- What do you do if I feel sensitivity?
- What should I avoid eating afterwards, and for how long?
How LED whitening at The Smile Bar works
A 20-minute LED session at The Smile Bar.
- Briefing and shade check. We look at your teeth and record your starting shade.
- Whitening. A low-concentration, pH-neutral gel from Sweden is applied and the LED lamp runs for 20 minutes.
- Repeat if you chose two or three sessions.
- Final shade. You leave with a whitening toothpaste and mouthwash.
| Package | Whitening | Visit | Price |
|---|---|---|---|
| Single Whitening | 1 × 20 minutes | About 30 minutes | 2,399 THB |
| Double Whitening | 2 × 20 minutes | About 60 minutes | 4,399 THB |
| Triple Whitening | 3 × 20 minutes | About 90 minutes | 5,799 THB |
- Result: 2 to 9 shades lighter, 5 on average.
- Afterwards: no strongly coloured food or drinks for 72 hours, or none of that with the Nano Protection add-on (750 THB). See what to eat after teeth whitening.
- Not for: women who are pregnant or breastfeeding, people who wear braces, anyone under 18.
More on the technology in our guide to cool light (LED) teeth whitening.
Before and after an LED session at The Smile Bar.
Book an LED whitening session in Siam Square
- Where: ground floor, 392/27-28 Siam Square Soi 5, next to BTS Siam
- When: every day, 10 am to 8 pm
- How: book online, or walk in when a chair is free
- Prices: on our teeth whitening prices page
Short on time? See how to whiten teeth fast.
Frequently asked questions
Does The Smile Bar offer laser teeth whitening?
No. We don’t use laser or Zoom. We whiten teeth with a UV-free LED lamp and a low-concentration gel, in 20-minute sessions.
How much is laser teeth whitening in Bangkok?
About 6,800 to 10,000 THB in dental clinics, based on prices published in October 2026. Promotions sit around 6,800 to 7,900 THB.
Is laser whitening better than LED?
Reviews of clinical trials have not found that laser gives a whiter result than other lights. The gel does the whitening. The practical differences are the setting, the time and the price.
Is Zoom a laser treatment?
No. Zoom uses an LED lamp. Some clinics and directories list it under “laser whitening”.
Does laser teeth whitening hurt?
Most people don’t feel pain, but temporary sensitivity is possible, as with any peroxide whitening.
How long does a laser whitening session take?
Clinics describe 45 to 90 minutes. A Single LED session at The Smile Bar takes about 30 minutes in total.
How long does laser whitening last?
It depends mostly on what you eat, drink and smoke afterwards, whichever light was used. Whitening isn’t permanent.
Will whitening work on crowns or veneers?
No. Only natural teeth whiten, with laser or LED.
