Laser dentistry: what the evidence says

You may have seen “laser dentistry” on a clinic website or heard about it from a friend. “Dental laser” covers many different procedures, and the research on them is mixed. TG’s Dental Suite does not list laser dentistry among its treatments, so this is general information.

What is a dental laser?

A laser produces a narrow, focused beam of light. In dentistry the beam is aimed at a tooth, at gum tissue or at whitening gel. What it does depends on the type of laser and how it is used. For sensitive teeth, for example, Cochrane says some lasers are meant to seal the sore area and others to numb it.

The Care Quality Commission (CQC), which reviews how practices use medical lasers when it judges whether they are safe and well-led, lists several uses. They include treating soft tissue lesions during gum or root canal treatment, reshaping gum tissue in cosmetic procedures, and cutting hard tooth tissue. The NHS adds teeth whitening, where a laser is shone onto whitening gel. “Laser dentistry” is a label for a group of techniques. The useful question is always “a laser for what?”

What does the evidence say?

Researchers have tested lasers against usual methods, a placebo or no treatment for several uses. The table gives the main finding of one review or guideline for each use, in plain terms.

Use	Main finding	Confidence
Removing decay, instead of a drill	2025, 20 studies: no significant difference in restoration survival. Fewer patients needed an anaesthetic and pain was lower, but the laser was slower.	Low to very low
Sensitive teeth	2021 Cochrane, 23 studies: compared with a dummy treatment or none, lasers may slightly reduce pain for up to 24 hours. After that, very uncertain.	Little confidence
Gum disease (periodontitis), alongside a deep clean below the gumline	2020 guideline from the European Federation of Periodontology, based on five trials: suggests not using lasers alongside the deep clean. There was too little evidence, and the extra cost may not be justified.	A suggestion rather than a strong recommendation. Most trials had unclear risk of bias
Upper lip frenectomy, diode laser instead of a scalpel	2026, six trials: less pain on days 1 and 7, less bleeding, shorter operation. No difference in swelling or in pain on day 3.	Low to very low
Teeth whitening	2026, ten reviews: no consistent improvement in final whitening. Sensitivity was not reduced, and some high-energy methods were less favourable.	Most of the ten reviews rated low or critically low

A frenectomy is a small operation to remove or release a frenum, the fold of tissue that can attach the upper lip to the gum.

The whitening overview also looked at a different use, low-power laser light after whitening, known as photobiomodulation. It found that this reduced sensitivity without affecting colour change, and rated that evidence moderate, not high.

Where a laser helped, it was mostly with comfort during or after a procedure, such as pain, bleeding or the need for an anaesthetic. Gains were small or absent in measures of how well the treatment worked, such as restoration survival and final tooth colour, and the gum disease guideline found too little evidence to recommend lasers. The reviewers mostly rate this evidence as low quality, often because the studies were small, were run in different ways or reported too little data to combine, so treat these findings as early signals.

Sources can disagree, too. The NHS describes laser whitening at a dental surgery as faster and more effective than gel on its own. The 2026 overview above found no consistent gain in final whitening from laser or light activation. We have not tried to settle that, and your dentist can tell you what they would expect for your teeth.

Is laser dentistry safe?

Lasers need the right precautions in place. The CQC says they carry risks to patients, staff and premises if appropriate safety measures are missing. These include damage to the eyes, injury to nearby tissue (including the skin around the mouth) and a possible fire risk.

Between them, the CQC and the Scottish Dental Clinical Effectiveness Programme (SDCEP) set out what a practice using lasers should have in place. For example:

• The laser is only used in a marked controlled area, with warning signs.
• Everyone in the area, including you, wears eye protection while the laser is on.
• Staff who use it have had laser safety training, and the practice has a laser protection adviser and a laser protection supervisor.
• You are asked for informed consent where a laser is part of your treatment.

Cochrane’s sensitive-teeth review found no clear unwanted effects from lasers, although its authors had little confidence in the evidence. The 2026 whitening overview says safety depended mainly on the settings used, especially how far the temperature inside the tooth rose with high-energy activation. Too much heat can damage the nerve inside the tooth, although the overview says clinical reports of this are rare.

If whitening, with or without a laser, is offered somewhere other than a dental practice, the NHS says it may not work as well and may harm your teeth and gums. You can check that someone is a registered dental professional on the General Dental Council website.

When to see a dentist

Whether or not a laser is involved, the problems it is used for need a proper look first. Take sensitive teeth as an example. Cochrane describes this sensitivity as short, sharp pain that is not due to another dental problem such as decay, so other causes need to be ruled out first. Our guide to why teeth are sensitive covers causes and what helps at home and at the dentist.

If a laser is suggested, it is reasonable to ask:

• What is it for, and what would the usual alternative be?
• What does the research say about this particular use?
• Who will use it, and what laser safety training do they have?
• Will I wear eye protection, and what am I being asked to consent to?
• Will it change how long the appointment takes?
• Does the laser add to the cost, and what would the usual treatment cost?

What we would do

Laser dentistry is not among the treatments listed on our website, so we cannot describe it here. Whatever you are considering, a new patient exam is the first step. We examine your teeth, gums and soft tissues, carry out an oral cancer screening, take small X-rays where needed, and explain your options in plain language.

These are the treatments we do list for the needs lasers are sometimes used for:

• Fillings remove decay and rebuild the tooth with tooth-coloured composite. Larger ones are usually done under local anaesthetic.
• Dental hygiene appointments clean and scale away plaque and tartar.
• A perio chip can be placed in a gum pocket after a periodontal clean, alongside hygiene care.
• Teeth whitening uses trays made for your teeth and is assessed by a dentist first.

We are not saying any of these replaces a laser, or the other way round. Which suits you depends on your mouth.

If a laser has been suggested to you, ask the dentist offering it whether it would suit you and bring the questions above. If you would rather talk it through with us first, you can book a check-up.

Want us to take a look?

Book an appointment at whichever of our five practices suits you. We will check what is going on and talk you through your options.

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