About the research on this page. The studies cited here investigate photobiomodulation (PBM) as a therapeutic modality and the specific wavelengths used in PBM research — not Mito Red Light devices. The wavelengths in our panels were chosen because the peer-reviewed PBM literature supports them. Evidence levels and study counts reflect the broader research base, not studies of our products. See the full methodology note at the bottom of this page.

Red Light Therapy for Oral Health: Clinical Evidence & Research

2411 StudiesPhotobiomodulation (PBM) Source-linked

What the research shows

Our evidence rating: Strong for oral mucositis; moderate for post-surgical dental pain; low for burning mouth and orthodonticsUpdated Reviewed by Alexis Cowan, PhD

Oral health has some of the strongest evidence for light therapy, led by oral mucositis in cancer care. A 2026 meta-analysis of 7 trials found that light therapy cut the risk of oral mucositis from chemotherapy or radiotherapy by about half (RR 0.50) (Rojas 2026). In head and neck cancer patients, light reduced radiotherapy-related mouth pain with moderate certainty, although effects on saliva flow were uncertain (De La Hoz 2026). After wisdom tooth removal, light reduced pain over the first 72 hours (Mauriello 2026), and after root canal treatment it reduced next-day pain (Bonacina 2026). For burning mouth syndrome, red and infrared laser reduced pain versus placebo, with low-quality evidence (Okuhara 2025).

Orthodontics is the main exception. An overview of 40 systematic reviews found light speeds tooth movement by about 1 mm over 3 months, but concluded that current evidence does not support routine use in orthodontics (Reis 2026).

Based on 2411 indexed studies in this category, 1237 of them in people. These studies test photobiomodulation in general, not Mito Red Light devices.

Evidence by condition

Number of studies in our database for each condition. Direction and certainty are shown only where a meta-analysis or systematic review reports them; otherwise the row says "not graded".

ConditionHuman randomized trialsAll human studiesDirection of resultsCertainty
Oral mucositis 76 126 About half the risk of oral mucositis
Rojas 2026 (PMID 42098536); MASCC/ISOO guideline (Zadik 2019, PMID 31286228)		 Not graded by authors; low risk of bias in included trials
Tooth extraction 104 116 Not graded Not graded
TMD 77 109 Not graded Not graded
Orthodontics: Tooth movement 53 61 About 1 mm faster over 3 months
Reis 2026 (PMID 41723260)		 Low; routine use not supported
Periodontium: Chronic periodontitis 52 57 Not graded Not graded
Orthodontics: Pain 52 56 Not graded Not graded
Dentin hypersensitivity 37 46 Not graded Not graded
Oral 16 38 Not graded Not graded
Dry mouth (xerostomia / hyposalivation) 20 34 Less mouth pain; saliva flow uncertain
De La Hoz 2026 (PMID 42782929)		 Moderate for pain; low for saliva
Aphthous stomatitis 19 32 Not graded Not graded
Burning mouth syndrome 20 30 Not graded Not graded
Nerves: Inferior alveolar 17 29 Not graded Not graded
Dental implants: stability 23 27 Not graded Not graded
Lichen planus 12 24 Not graded Not graded
Osteonecrosis (MRONJ/ORN) 1 24 Not graded Not graded

Key studies: Oral Health

The strongest human evidence: systematic reviews and meta-analyses first, then the newest randomized trials. Each card comes straight from our study database and links to the paper.

Meta-analysis

Photobiomodulation for the treatment and prevention of chemotherapy- and/or radiotherapy-induced oral mucositis in cancer patients: a systematic review and meta-analysis of randomized clinical trials published in the last six years

et al., Support Care Cancer, 2026. PMID 42098536

Key finding (checked against the abstract)7 trials, 329 patients receiving chemotherapy or radiotherapy. Light therapy halved the risk of oral mucositis (RR 0.50); most trials used 660 nm intraoral laser.
Population
Meta-analysis
Meta-analysis

The Effect of Photobiomodulation Therapy in the Treatment of Postoperative Pain After Impacted Third Lower Molar Extraction: A Systematic Review with Meta-Analysis.

et al., Dent J (Basel), 2026. PMID 42782975

Key finding (checked against the abstract)8 randomized trials (2 pooled) after lower wisdom tooth removal. Less pain at 24, 48 and 72 hours (SMD -0.64 to -1.11). Limited number of studies.
Population
Mixed
Meta-analysis

Photobiomodulation in orthodontics: an overview of systematic reviews with meta-regression and evidence map

et al., Odontology, 2026. PMID 41723260

Key finding (checked against the abstract)Overview of 40 systematic reviews (134 studies, 4,730 participants). About 1 mm faster tooth movement over 3 months in low-bias studies; no difference for most other outcomes. Does not support routine orthodontic use.
Meta-analysis

Effects of Photobiomodulation on Burning Mouth Syndrome: A Systematic Review and Meta-Analysis

et al., J Oral Rehabil, 2025. PMID 39871648

Key finding (checked against the abstract)13 studies, 503 participants with burning mouth syndrome. Red and infrared laser reduced pain versus placebo. Low-quality evidence.
Meta-analysis

Effectiveness of Photobiomodulation as a Treatment for Xerostomia in Patients with Head and Neck Cancer Undergoing Radiotherapy: A Systematic Review and Meta-Analysis.

et al., Dent J (Basel), 2026. PMID 42782929

Key finding (checked against the abstract)7 randomized trials in head and neck cancer. Light reduced radiotherapy-related mouth pain (moderate certainty); saliva flow results were not significant (low to very low certainty).
Population
Mixed
Meta-analysis

Analgesic Efficacy of Low-Level Laser Therapy for Postoperative Endodontic Pain: A Systematic Review and Meta-Analysis

et al., Aust Endod J, 2026. PMID 41492762

Key finding (checked against the abstract)9 studies after root canal treatment. Light reduced pain versus placebo at one day (VAS mean difference -0.56).
Population
Human

Studies that found no effect

Not every trial is positive. "No effect" means the main outcome did not differ from sham or control. "Mixed" means some outcomes improved but the outcome named here did not differ.

YearStudyDesignResultOutcome with no difference
2026 Effects of 660 nm & 808 nm photo-biomodulation on S100A8/A9 in symptomatic pulpitis: a randomized controlled trial RCT, n = 35 No effect Inflammation biomarkers (S100A8/A9)
2026 PBM's effects on plaque microbiome for periodontal-orthodontic patients during retention RCT, n = 6 No effect Plaque bacteria and periodontal measures
2026 Single-session extraoral photobiomodulation reduces early postoperative pain but not edema or trismus after impacted mandibular third molar extraction: a randomized controlled trial. RCT, n = 70 Mixed Swelling and jaw opening (pain reduced)
2026 Analysis of the efficacy of photobiomodulation therapy in the treatment of oral lichen planus: A systematic review and meta-analysis of randomized and non-randomized clinical trials Meta-analysis Mixed Disease severity and anxiety versus conventional therapy (pain slightly lower)

Latest human studies: Oral Health

The 25 most recent human studies in our database for this category.

YearStudyDesignPopulation
2026 Effect of Low-Level Laser Therapy on Stability of Dental Implants in D3 and D4 Bone Quality: A Split-Mouth Randomized Controlled Clinical Trial. RCT, n = 10 Human: 10 participants
2026 Development and Validation of an Extraoral Condyle Locating Device and Its Effect on Low-Level Laser Therapy in Patients With Skeletal Class II Malocclusion: Protocol for a 2-Phase Randomized Controlled Trial. RCT, n = 50 Human: 50 participants
2026 Acceptance and perceived efficacy of intraoral versus extraoral photobiomodulation for oral mucositis prevention in pediatric patients. RCT Human
2026 Comparison of the Clinical Effectiveness of Two Photobiomodulation Systems for Facial Nerve Dysfunction Following Temporomandibular Joint Surgery. Human study Human
2026 Effect of Low-Level Laser Therapy on Implant Osseointegration and Peri-Implant Clinical Outcomes: A Prospective Observational Study. Human study Human
2026 Single-session extraoral photobiomodulation reduces early postoperative pain but not edema or trismus after impacted mandibular third molar extraction: a randomized controlled trial. RCT, n = 70 Human: 70 participants
2026 Management of Gingival Reactive Lesions: A Case Series. Case report Human
2026 Effects of 660 nm & 808 nm photo-biomodulation on S100A8/A9 in symptomatic pulpitis: a randomized controlled trial RCT, n = 35 Human: Randomized trial; 35 participants
2026 Evaluation of post-operative pain, edema, trismus following third molar surgery using low level laser therapy: A randomised clinical trial RCT, n = 60 Human: Randomized trial, split-mouth; 60 participants
2026 Therapeutic Effect of Low-Level Laser Therapy in Patients with Temporomandibular Disorder RCT, n = 63 Human: Comparison study, randomized; 63 participants
2026 Photobiomodulation to minimize talquetamab-associated dysgeusia and xerostomia in multiple myeloma: a brief report of four cases Case series, n = 4 Human: Case series; 4 patients
2026 Effect of Photobiomodulation on Postoperative Pain in Endodontic Surgery: A Randomized Controlled Clinical Study RCT, n = 36 Human: Comparison study, randomized, double-blind; 36 participants
2026 Comparative Evaluation of Photobiomodulation and Intracanal Cryotherapy on Post-Endodontic Pain Following Single-Visit Root Canal Treatment: A Randomized Controlled Trial RCT, n = 90 Human: Randomized trial; 90 participants
2026 PBM's effects on plaque microbiome for periodontal-orthodontic patients during retention RCT, n = 6 Human: Randomized trial, split-mouth; 6 participants
2026 Efficacy of Low-Level Laser Therapy on Soft Tissue Healing, Pain, and Bone Preservation After Dental Implant Placement: A Randomized Clinical Trial RCT, n = 272 Human: Randomized trial; 272 participants
2026 Effect of Adjunctive Low-Level Laser Therapy on Wound Healing Following Surgical Gingival Depigmentation: A Prospective Study Single-arm study, n = 24 Human: Single-arm study; 24 participants
2026 Pulsed Nd:YAG versus continuous-wave laser photobiomodulation for orthodontic pain: a split-mouth RCT RCT, n = 96 Human: Randomized trial, sham-controlled, split-mouth; 96 participants
2026 Effectiveness of photobiomodulation in the treatment of xerostomia in type II diabetic patients RCT, n = 52 Human: Randomized trial; 52 participants
2026 Photobiomodulation for primary wound healing and patient-reported outcomes after esthetic crown lengthening surgery: A pilot randomized clinical trial RCT, n = 27 Human: Randomized trial, split-mouth, triple-blind; 27 participants
2026 Effect of photobiomodulation therapy on wound healing and post-extraction pain management of primary molars: a randomized controlled clinical trial RCT, n = 18 Human (pediatric): Randomized trial, double-blind, split-mouth; 18 participants (36 teeth)
2026 Comparing low-level laser therapy and ultrasound therapy for pain reduction in temporomandibular disorders: A quasi-experimental study Human study, n = 46 Human: Comparison study; 46 participants
2026 Effect of 810-nm diode laser photobiomodulation on the reversal of maxillary and mandibular soft tissue local anaesthesia in children: a randomized split-mouth clinical trial RCT, n = 40 Human (pediatric): Randomized trial, split-mouth; 40 participants
2026 Non-Invasive Management of Osteoradionecrosis With Intra- and Extraoral Fistulas Using Combined Photodynamic and Photobiomodulation Therapy: A Case Report Case report Human: Case report
2026 Salivary Methotrexate as a Predictor of Oral Mucositis in Hematological Cancer Patients: A Phase II Randomized, Double-Blind Clinical Trial. Human study Human
2026 Effect of low-level laser therapy on postoperative swelling after surgical management of zygomaticomaxillary complex fracture RCT, n = 46 Human: Randomized trial; 46 participants

Light parameters used in the trials

Wavelengths reported in our database for the 878 human randomized trials in this category (274 wavelength entries; many database records lack a wavelength, and some trials report more than one). This describes the research; it is not a dosing recommendation.

Wavelength bandTimes used in trials
Red (600-699 nm)136
Near-infrared (800-899 nm)81
Near-infrared (900-1200 nm)36
Blue/green (400-599 nm)13
Deep red/near-infrared (700-799 nm)8

Most common wavelengths: 660-669 nm, 810-819 nm, 800-809 nm, 630-639 nm, 650-659 nm.

What the evidence does not show

  • Routine use in orthodontics: an overview of 40 reviews concluded the evidence does not support it (Reis 2026, PMID 41723260).
  • Restored saliva flow after radiotherapy: pooled results favored light but were not significant (De La Hoz 2026, PMID 42782929).
  • High-certainty benefit in burning mouth syndrome: evidence quality was low to very low (Okuhara 2025, PMID 39871648).

Frequently asked questions

Does light therapy prevent oral mucositis during cancer treatment?

A 2026 meta-analysis of 7 trials found it reduced oral mucositis by about half (RR 0.50) (Rojas 2026).

Does it reduce pain after dental surgery?

After wisdom tooth removal, light reduced pain during the first 72 hours (Mauriello 2026). After root canal treatment, it reduced pain the next day (Bonacina 2026).

Does it speed up braces?

Low-bias studies show about 1 mm faster tooth movement over 3 months, but an overview of 40 reviews concluded the evidence does not support routine use (Reis 2026).

Related Resources

Research Hubs

Guides

Browse All Oral Health Studies

All 2411 studies in this category from our study database, built on the PBM Research Database by Vladimir Heiskanen.

Search every study across all categories: Open the Full Evidence Explorer →

Methodology & important context

The published research indexed and referenced on this page studies photobiomodulation (PBM) as a therapeutic modality and the specific wavelengths used in those studies — not Mito Red Light devices specifically. The wavelengths used across our panels were chosen because the peer-reviewed PBM literature supports them: this is where published evidence is deepest, where dosing parameters have been characterized in human studies, and where clinical guidelines (such as WALT for inflammation and pain) exist. Mito Red Light has not funded or conducted registered clinical trials on our specific devices, and the study counts referenced here reflect the broader PBM research base — not studies of our products.

Where review authors graded certainty (for example with GRADE), we report their grade; other ratings are Mito’s summary. Study counts reflect peer-reviewed photobiomodulation research drawn from major scientific literature databases, peer-reviewed journals, and other published research repositories. PBM response varies meaningfully by person, tissue, condition, dose, wavelength, and session timing; outcomes reported in the published literature may not be replicable for every user. Mito Red Light devices are not intended to diagnose, treat, cure, or prevent any disease. If you have a medical condition or are under a physician’s care, please consult your healthcare provider before beginning any photobiomodulation regimen.