About this trial
The ADAPT study is a single-site, Phase 2b, randomized, quadruple-masked, placebo-controlled trial evaluating an omega-3 dietary supplement enriched with specialized pro-resolving mediator (SPM) precursors in adults with chronic temporomandibular disorder (TMD) pain. The trial will enroll 100 adults aged 18 years or older with examiner-confirmed TMD myalgia or arthralgia will be enrolled at the University of North Carolina at Chapel Hill, Adams School of Dentistry.
Participants are randomized 1:1 to receive either the SPM precursor supplement or a matched placebo daily for 8 weeks. Randomization is stratified by sex, and study agents are identical in appearance to maintain masking.
The study aims to evaluate whether the SPM precursor supplement:
Reduces facial pain intensity compared with placebo.
Changes pressure pain sensitivity at the jaw and other standard body sites.
Affects other aspects of chronic pain, including duration, interference with daily activities, headache burden, anxiety, depression, jaw-related quality of life, and overall patient-reported change.
Participants will record their daily facial pain intensity in paper diaries, complete short questionnaires at baseline, Week 4, and Week 8, and undergo experimental pain testing with a handheld algometer at baseline, Week 4, and Week 8. Safety is monitored through the documentation of all adverse events throughout the study period.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Age ≥18 years.
Pain in jaws, temples, ears, or in front of ears at least 5 days in the past 30 days, occurring monthly over the last 3 months.
Pain not due to toothache or ear infection.
Pain intensity ≥30 on a 0-100 numeric rating scale (NRS) during the week before pre-screening.
Disqualifiers
None
Trial design
Parallel
Treatments tested in this trial
SPM Precursor-Enriched Marine Lipid Supplement
Dietary supplementParticipants receive omega-3 SPM precursor-enriched marine lipid softgels administered daily for 8 weeks at the dose specified in the protocol.
Medium-Chain Triglyceride Supplement
Dietary supplementParticipants receive matched placebo softgels daily for 8 weeks.
Treatment groups
Trial outcomes
Primary outcomes
Change in average weekly facial pain intensity
Net change from baseline to Week 8 in average weekly facial pain intensity, calculated as the mean of daily entries recorded in the Daily Symptom Diary (DSD). Higher scores indicate worse pain.
Rate of treatment-emergent adverse events
Rate of participants experiencing any adverse event (AE) that first appears or worsens after starting the study intervention and up to 7 days after the last dose. Investigators record onset, duration, severity, and relatedness to the study intervention. This measure evaluates the safety of the SPM precursor marine lipid supplement compared with placebo.
Secondary outcomes
Change in TMD pain duration
Change from baseline to Week 8 (Visit 3) in the percentage of waking time with facial pain, expressed in percentage points, based on daily diary entries (0-100 scale).
Change in TMD pain intensity and pain interference
Change from baseline to Week 8 (Visit 3) in TMD pain intensity (current, worst, and average) and interference with daily activities. Assessed using the Graded Chronic Pain Scale (0-10 scale), with higher scores indicating worse pain and greater interference.
Change in headache impact
Change from baseline to Week 8 (Visit 3) in headache impact measured with the Headache Impact Test-6 (HIT-6). Scores range 36-78, with higher scores indicating greater headache-related impact.
Change in number of painful body sites
Change from baseline to Week 8 (Visit 3) in the number of anatomical locations marked as painful on anterior and posterior body manikins (range 0-42), with higher scores indicating more widespread pain.
Sponsors and contacts
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University of North Carolina, Chapel Hill
Lead sponsor
National Institute of Dental and Craniofacial Research (NIDCR)
Collaborator
Metagenics LLC
Collaborator
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