What is laser dentistry, and which procedures actually use a laser?

What "laser dentistry" means

A dental laser produces a narrow beam of light at a single wavelength. When that light reaches tissue, its energy is taken up by whatever in the tissue absorbs that wavelength, most often water, the pigment in blood and gum tissue, or the mineral in enamel and dentin. Where the energy is absorbed, a small volume of tissue is heated or vaporized in a controlled way. That is the whole mechanism: a laser is a cutting or treating instrument that happens to use light.

So "laser dentistry" describes a tool, not a philosophy and not a specialty. The examination, the diagnosis, the decision about whether a procedure is needed at all, and most of the procedure itself are the same whether a laser is involved or not. The laser replaces or supplements the scalpel, the drill or the ultrasonic scaler only for the steps where its wavelength is absorbed well by the target tissue and where using it offers some practical difference. If you are weighing care choices rather than labels, the guide on holistic versus conventional dentistry applies the same logic.

What changes the answer

Three things decide whether a laser is used for a given step.

• The tissue being treated. Carbon dioxide lasers are absorbed strongly by water, and diode lasers by the pigment in blood and gum tissue; both properties suit them to soft tissue: gum, the lining of the mouth, and the small folds of tissue under the lip and tongue. Erbium-family lasers are absorbed by water and by the mineral in hard tissue, so they are the type most often used to remove enamel, dentin and, in some settings, bone. A laser designed only for soft tissue cannot prepare a cavity, so an office that owns only one type usually cannot offer the uses of the other.
• The goal of the procedure. Removing a sliver of gum to even up a gum line is a different task from cleaning a root surface in a deep pocket or removing decay. A laser may fit one well, be only an adjunct in another, and play no part in a third.
• Whether the laser changes anything for you. For some steps, published trials show comparable results with less reported discomfort; for others, the evidence shows no meaningful difference, and the conventional instrument remains the standard choice. Reviews of dental lasers also note that equipment cost and the training needed to use each wavelength safely limit how widely they are adopted, which is why offices differ so much in what they offer.

Procedure by procedure: where a laser may be used

Gum reshaping and soft-tissue crown lengthening

When a tooth looks short because gum covers more of it than usual, or a gum line is uneven, a small amount of soft tissue can be removed and recontoured. Periodontists describe this as crown lengthening or treatment of a "gummy smile." It can be done with a scalpel or with a soft-tissue laser. When bone also has to be reshaped to expose more tooth, that is a surgical procedure, and a soft-tissue laser alone is not the usual instrument for it.

Frenectomy (tongue-tie and lip-tie)

A frenum (also called a frenulum) is the small band of tissue that connects the lip to the gum or the tongue to the floor of the mouth. When it restricts movement, releasing it is called a frenectomy or frenotomy. Soft-tissue lasers are often used for this. A meta-analysis comparing laser techniques with a scalpel for lip frenectomy found the laser groups reported less pain and less discomfort with speech and chewing, while the authors cautioned that the included trials were few and at high risk of bias.

Two cautions matter more than the instrument. First, the American Academy of Pediatrics' 2024 clinical report states that it is not clear whether releasing a tight lingual frenulum in newborns improves breastfeeding, and that many symptoms attributed to tongue-tie overlap with other feeding difficulties, so a feeding assessment by a team should come before any decision to treat. Second, whether frenectomy, particularly in an infant, is done at this office or referred is something to ask rather than assume.

Small soft-tissue growths and biopsies

Small benign lumps such as fibromas and mucoceles are often removed with a soft-tissue laser, and a laser can be used to take a biopsy of a suspicious area. In either case the tissue is usually sent to a pathology laboratory; the laser changes how tissue is removed, not whether it should be examined. For a biopsy taken to reach a diagnosis, the dentist chooses the instrument that preserves the sample best. Ask whether biopsies are done in-house or referred.

Cold sores and mouth ulcers

Low-power laser treatment, sometimes called photobiomodulation or low-level laser therapy, is used on cold sores (herpes labialis) and canker sores (aphthous ulcers) with the aim of easing pain and shortening healing. Systematic reviews report that most included trials found pain relief and faster healing, but the trials are few, use different laser settings and are generally of low quality. This is best described as a reasonable adjunct with limited evidence, not an established treatment, and it does not replace care a physician or dentist may recommend.

Periodontal pockets, as an adjunct to cleaning

The standard treatment for gum disease that has created pockets around the teeth is scaling and root planing: cleaning the root surfaces below the gum line. A diode laser may be used after that cleaning to treat the lining of the pocket. A systematic review of diode lasers used this way found mixed results: some trials showed a modest added benefit, others no difference. The laser is an addition to the cleaning, not a replacement for it, and not a substitute for periodontal surgery where that is needed.

Cavity preparation in selected cases

Erbium lasers can remove decay and prepare a tooth for a filling. A Cochrane systematic review of nine trials concluded that the evidence was insufficient to support lasers as an alternative to the drill for removing decay, while noting low-quality evidence that patients reported less discomfort and less need for anesthetic during laser preparation. In practice, laser cavity preparation may be offered for selected smaller cavities, and the filling that follows is the same. Larger damage is a different conversation; see when a partial-coverage restoration may be discussed instead of a crown.

Whitening "activation"

Some in-office whitening systems shine a laser or other light on the gel. A systematic review and meta-analysis found that light activation did not improve the final whitening result and did not change tooth sensitivity. The peroxide gel does the whitening; the light is not what makes it work.

Where lasers are not the usual choice

Preparing a tooth for a crown or onlay, extracting most teeth and shaping root canals are usually done with conventional instruments. In root canal treatment, a laser is sometimes used to agitate the disinfecting solution inside the canal; this is an adjunct to conventional irrigation, so ask what added benefit is expected. If an office describes a "laser root canal" or "laser crown," ask which step the laser actually performs.

What the evidence supports, and what it does not

• Reasonably supported: comparable outcomes for several soft-tissue procedures, with less postoperative pain reported in some trials; less reported discomfort during cavity preparation in low-quality trials; a modest adjunctive benefit in some periodontal trials.
• Not supported as general rules: that laser treatment is painless, that healing is always faster, that bleeding is always less, that anesthetic is unnecessary, or that a laser result is better than a conventional one. Any of these may hold for a particular step and a particular patient, which is exactly why the useful question is "which step" rather than "laser or no laser."
• What this practice does not claim: that a laser makes a procedure safer or more successful by itself, that it detoxifies or treats anything beyond the tissue it touches, or that it lets you avoid a procedure that an examination shows you need.

How dental lasers are regulated

The FDA regulates medical lasers both as medical devices and as radiation-emitting electronic products, and manufacturers must comply with federal performance standards for laser products. That regulation concerns the safety, labeling and certification of the equipment. It is not an endorsement of any clinical benefit, and it does not rank one wavelength above another for a given procedure.

Questions to ask the office, and the next step

Loul Dental Studio lists laser dentistry among its services. Which procedures use a laser here depends on the laser type the office uses, so the practical questions are:

• Which type of laser do you use, soft-tissue, hard-tissue or both, and for which procedures?
• For my procedure, which step would the laser perform, and what instrument would you use otherwise?
• What difference, if any, would I notice, and is that difference supported by evidence or by preference?
• Is local anesthetic still used?
• Are frenectomies and biopsies done here or referred?

If a laser is proposed, ask that the answers be written into the treatment plan you receive. The guide on what biologic dentistry means and which questions to ask covers how to weigh an office's technology choices. To discuss a specific procedure, use the appointment request page; a request is not a confirmed appointment, and the team follows up to schedule.