Dental treatment without the sound of the drill, gum treatment without a scalpel: lasers in the dental surgery sound appealing. There are indeed sensible applications, but for many uses the added benefit over proven methods has not been reliably demonstrated. This overview shows where lasers can help and where the evidence calls for caution.
Which lasers are used in dentistry
Lasers differ mainly in their wavelength, and this determines which tissue absorbs the light. Erbium lasers (Er:YAG and Er,Cr:YSGG) are strongly absorbed by water. They can therefore remove tooth hard tissue and bone layer by layer without heating the tissue much. Diode and Nd:YAG lasers penetrate deeper, are absorbed more by pigments and haemoglobin and are suited to soft tissue and reducing bacteria. CO2 lasers cut soft tissue very precisely while stopping bleeding. For all devices, the eyes of the patient and the team must be protected with suitable safety glasses, and use requires specific training.
Periodontitis and peri-implantitis: lasers as an adjunct
In periodontitis, bacteria and the body’s inflammatory response destroy the tissues that support the teeth. The basis of any treatment is good home oral hygiene, professional cleaning and careful mechanical cleaning of the gum pockets with hand instruments or ultrasonic devices. Lasers have been widely studied as an add-on, to kill bacteria in the pockets or remove inflamed tissue. Antimicrobial photodynamic therapy, in which a dye is placed in the pocket and activated with light, also belongs in this group.
The European S3 guideline of the periodontology societies and its German version have evaluated the studies. The result: the additional benefit over mechanical cleaning alone is too small or too uncertain. The guidelines therefore suggest not using lasers or photodynamic therapy as a routine adjunct. This does not mean a laser is harmful, but it does mean that it does not replace basic treatment and that extra benefit has not been shown. The situation is similar for peri-implantitis, inflammation around dental implants: lasers are being studied for cleaning the implant surface, but a clear advantage over other methods has not yet been demonstrated.
Root canals, soft tissue and sensitive teeth
Root canal treatment: The canal system of a tooth is branched, and bacteria can survive in fine side canals. Lasers are used to activate irrigation solutions and carry them deeper into the canal system, or to reduce bacteria directly. This works well in the laboratory. Whether more teeth are preserved in the long term than with careful mechanical preparation and chemical irrigation has not yet been adequately established. Here the laser is at most a supplement.
Soft tissue surgery: This is one of the laser’s strengths. Minor procedures such as releasing a tight lip or tongue tie, correcting gum overgrowth, removing small benign growths or uncovering a healed implant can often be done with little bleeding and without stitches. Many patients find healing comfortable. Important: if removed tissue is to be examined under the microscope, the heat can alter its edges. For unclear changes in the oral mucosa, diagnosis therefore comes before removal.
Sensitive tooth necks: When tooth necks are exposed, cold and sweet foods can hurt. Lasers can seal the fine tubules in the dentine or dampen nerve conduction. Studies show relief, but the placebo effect is also large for this complaint. Simple measures such as special toothpastes, fluoride varnishes and gentle brushing usually come first.
Removing caries with an Er:YAG laser
Erbium lasers can remove decayed tooth tissue. Advantages are less vibration and noise, which suits anxious people and children in particular. A Cochrane review found indications that local anaesthesia is needed less often and less pain is reported with laser treatment. There was no clear difference from the drill in how long fillings last. However, the authors rated the quality of the evidence as low and saw no sufficient basis for recommending lasers as an equivalent replacement. Practical limits: treatment often takes longer, and old metal or ceramic fillings cannot be removed with the laser, so the drill is still needed for these.
| Application | Possible advantages | Evidence |
|---|---|---|
| Soft tissue surgery | little bleeding, often no stitches | established, well founded |
| Periodontitis (adjunct) | bacterial reduction | guidelines advise against routine use |
| Root canal disinfection | more effective irrigation | long-term benefit unclear |
| Sensitive tooth necks | relief possible | mixed, large placebo effect |
| Caries removal (Er:YAG) | less vibration and anaesthesia | low, no clear superiority |
Costs and perspective
In Germany, laser treatments are generally not part of the statutory health insurance catalogue and are billed privately under the dental fee schedule; in other countries rules differ. Private insurers reimburse depending on the policy. Before treatment, ask for a written cost estimate and ask what concrete advantage the laser is expected to bring in your case and what the alternative is. A trustworthy consultation also names where the evidence is uncertain.
All in all, the laser in dentistry is an additional tool, not a substitute for the basics. If you want to keep your gums and teeth healthy, you benefit most from thorough oral hygiene, regular check-ups, not smoking and early treatment of caries and gum inflammation.
Frequently asked questions
Is laser dentistry painless?
Not always. Anaesthesia is needed less often for caries removal, but the treatment is not painless for everyone. Surgical procedures are usually done under local anaesthesia.
Does laser treatment help with gum disease?
Current guidelines see no sufficiently proven added benefit over thorough mechanical cleaning and therefore advise against routine adjunctive use.
Does insurance cover laser dentistry?
Statutory health insurance in Germany usually does not. Costs are billed privately, and private insurers reimburse depending on the policy. A written cost estimate provides clarity.
Can a laser replace the dental drill?
Only partly. It is suitable for certain types of decay but not for removing old fillings. The evidence is not sufficient to recommend it as an equivalent replacement.
Is laser treatment in the mouth dangerous?
When used properly with eye protection it is considered safe. The main risk is unintended heating of tooth, bone or tissue if settings are wrong.
Read more: Laser medicine overview · Medical encyclopedia
This article is for general information only and does not replace medical advice. It is not an advertisement for any particular treatment or provider.
Sources
- European Federation of Periodontology (EFP): Treatment of stage I–III periodontitis, S3 level clinical practice guideline (summary)
- Cochrane Review: Lasers for caries removal in deciduous and permanent teeth (Montedori et al., 2016)
- DG PARO and DGZMK: German S3 guideline on the treatment of stage I–III periodontitis, AWMF register 083-043, 2020 (German)