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Evaluation of the Efficacy and Safety of Diode Laser Irradiation for Pain Following Separator Placement in Orthodontic Treatment

Evaluation of the Efficacy and Safety of Diode Laser Irradiation for Pain Following Separator Placement in Orthodontic Treatment: A Randomized, Placebo-Controlled, Single-Blind Exploratory Study Using a Split-Mouth Design

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCTs062250085
Enrollment
50
Registered
2026-01-27
Start date
2026-01-27
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Pain induced as an adverse effect of the elastic separator procedure, which is a preliminary treatme

Interventions

After performing the separation procedure on the maxillary bilateral first molars, diode laser X will be applied using the following parameters: wavelength 808 nm plus minus 20 nm, peak power 7 W, ave

Sponsors

Tanimoto Kotaro
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Patients diagnosed with malocclusion who are scheduled to undergo comprehensive orthodontic treatment. Patients who are 16 years of age or older at the time written informed consent is obtained. Patients in the permanent dentition stage in whom eruption of the maxillary bilateral second premolars, first molars, and second molars has been completed. Patients who do not have any orthodontic appliances attached to the mandibular dentition. Patients who require placement of separators for the trial fitting and adjustment of bands on the maxillary bilateral first molars. Patients from whom written informed consent to participate in this study can be obtained. In the case of minors aged 16 years 0r older, written consent shall be obtained both from the participant and from a legally authorized representative.

Exclusion criteria

Exclusion criteria: Patients presenting with moderate or greater alveolar bone loss and/or periodontal pockets of 4 mm or deeper in the maxillary bilateral first molar region. Patients with dental caries classified as C3 or higher, pulpitis of C3 severity or higher, or previous endodontic treatment in the maxillary first molars, second molars, or second premolars. Patients with tumors, ulcers, mucosal diseases, labial herpes, or moderate or severe gingivitis in the oral or maxillofacial tissues. Patients with metabolic bone disorders, osteoporosis, or those currently receiving medication for diseases related to bone metabolism. Patients with an implanted pacemaker or implantable cardioverter-defibrillator (ICD). Patients who are pregnant. Patients taking anti-inflammatory analgesics or antibiotics within one week prior to laser irradiation, or patients currently taking immunosuppressive drugs such as corticosteroids. Patients with neuropathic pain, chronic pain, or acute pain. Patients who are unable to express their free will. Patients who are deemed unsuitable for participation in this study by the principal investigator or a co-investigator.

Design outcomes

Primary

MeasureTime frame
Resting pain one day after laser irradiation, evaluated using the Visual Analog Scale (VAS).

Secondary

MeasureTime frame
Time-dependent changes in resting pain (VAS): Measurements will be taken 30 minutes, 1 hour, and 6 hours after laser irradiation, and once daily from Day 1 to Day 7. Time-dependent changes in pain during occlusion (VAS): Measurements will be taken 6 hours after laser irradiation, and once daily from Day 1 to Day 7. Detailed time-dependent changes in resting pain (Short-Form McGill Pain Questionnaire-2; SF-MPQ-2): Measurements will be taken 30 minutes, 1 hour, and 6 hours after laser irradiation, and once daily from Day 1 to Day 7. Changes in the surface temperature of the intraoral tissues: Measurements will be taken before irradiation, immediately after irradiation, and at 15 minutes, 30 minutes, and 1 hour after irradiation.

Contacts

Public ContactRyo Kunimatsu

Graduate School of Biochemical and Health Sciences, Hiroshima University

ryoukunimatu@hiroshima-u.ac.jp+81-82-257-5686

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026