Photobiomodulation for the Management of Temporomandibular Disorder Pain

Inclusion Criteria: * Provides a signed and dated informed consent form * Is at least 18 years of age (male or female and any race or ethnicity) * Meets diagnostic criteria for TMD, ( Masticatory Muscle Disorders, 1A: Myalgia) * Has experienced facial pain for at least 3 months * At Screening and Baseline Visit (Visit 0), reports an average pain intensity rating over the past week of ≥ 30 on a numerical rating scale (0-100) Exclusion Criteria: * Starting a new daily prescription medication for the management of pain within 30 days prior to treatment session; * Use of any injection therapy (e.g., tender or trigger point injections, steroid injections) for the management of pain within 2 weeks prior to the CATI; * Starting occlusal appliance therapy within 30 days prior to CATI; d) history of facial trauma or orofacial surgery within 6 weeks prior to CATI; * Active orthodontic treatment; * Psychiatric hospitalization within one year prior to screening. * Has known hypersensitivity to laser therapy. * Currently being treated with chemotherapy or radiation therapy * Has been treated with another investigational drug or treatment within 30 days prior to the Screening and Baseline Visit * Is pregnant or nursing * Anything that, in the opinion of the investigator, would place the participant at increased risk or preclude the participant's full compliance with or completion of the study