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Three Photobiomodulation Wavelengths (635, 940, and 1064 nm) on Chronic Myogenic Temporomandibular Disorder
Sponsor: Alexandria University
Summary
Temporomandibular disorders (TMDs) are among the most common musculoskeletal conditions associated with chronic orofacial pain and functional disability. Chronic Myogenic TMD (MTMD) is the most prevalent subtype and is characterized by persistent masticatory muscle pain driven by peripheral and central sensitization mechanisms. Photobiomodulation (PBM) represents a conservative, non-invasive therapeutic modality within the medical management of TMD; however, the wavelength-dependent clinical and muscular effects remain inadequately defined. Aim: To compare the efficacy of three PBM wavelengths (635, 940, 1,064 nm) on pain intensity, mandibular function, surface electromyographic activity (sEMG), and pressure pain threshold (PPT) in patients with chronic myogenic TMD.
Official title: Efficacy of Three Photobiomodulation Wavelengths (635, 940, and 1064 nm) on Chronic Myogenic Temporomandibular Disorder A Randomized Clinical Trial
Key Details
Gender
All
Age Range
20 Years - 50 Years
Study Type
INTERVENTIONAL
Enrollment
45
Start Date
2026-06-01
Completion Date
2026-12-30
Last Updated
2026-06-04
Healthy Volunteers
No
Conditions
Interventions
635 nm red diode laser
Participants will receive PBM therapy using a 635 nm red diode laser (Lasotronix), standardized at a fluence of 8 J/cm² for energy density and Irradiance of 0.50 W/cm² power density in continuous wave using PBM applicator (8mm tip) for 16 seconds, near-contact working distance.
940 nm NIR diode laser (Biolase)
Participants will receive PBM therapy using a 940 nm NIR diode laser (Biolase), standardized at a fluence of 8 J/cm² and Irradiance of 0.63 W/cm² power density in continuous wave using deep tissue handpiece (10mm tip) for 12.8 seconds.
1064 nm Nd:YAG laser (Fotona)
Participants will receive PBM therapy using a 1064 nm Nd:YAG laser (Fotona), standardized at a fluence of 8 J/cm² energy density and Irradiance 0.53 W/cm² power density, using a genova handpiece (11mm tip) stamping technique for 15.2 sec.
Locations (1)
Outpatient Clinic of Oral medicine Department, Faculty of Dentistry, Alexandria University, Egypt
Alexandria, Egypt