ManualTherapyintheTreatmentofMyofascialPainRelatedtoTemporomandibularDisorders:ASystematicReview

Myofascial pain in the masticatory (jaw) muscles is the most common form of temporomandibular disorder (TMD), affecting more than half of patients seen in specialized clinics worldwide. This condition causes significant pain and functional limitations, making it challenging for clinicians to treat due to its complex causes and the many different treatment approaches available. Manual therapy has emerged as a promising conservative treatment option, involving techniques like jaw mobilization, muscle massage, stretching exercises, and movement training. However, the scientific evidence for manual therapy's effectiveness has been limited by inconsistent study designs, varied treatment combinations, and lack of standardized diagnosis criteria.

The researchers conducted a systematic review following strict scientific guidelines (PRISMA) to evaluate the effectiveness of manual therapy for TMD-related myofascial pain. They searched multiple medical databases for randomized controlled trials published through 2019, using specific search terms related to TMD, myofascial pain, and manual therapy. Only studies that used the Research Diagnostic Criteria for TMD (RDC/TMD) for diagnosis were included to ensure consistency. The researchers independently reviewed all studies and assessed their quality using the Cochrane Risk of Bias tool.

They analyzed 143 initial records, which were narrowed down to just 5 high-quality studies that met their strict criteria.

The 5 included studies examined 279 patients total, with 156 receiving manual therapy either alone or combined with counseling. The studies showed that manual therapy was effective for pain relief in all cases evaluated. However, the results were mixed when compared to other treatments. In one study, manual therapy was better than no treatment at all.

In another study, manual therapy was more effective than counseling alone (P < 0.001). However, when manual therapy was combined with counseling, it was not statistically better than counseling alone (success rate of 77% vs 57%, P = 0.157). Manual therapy also showed no significant advantage over botulinum toxin injections for pain relief. One study found that professional manual therapy combined with home exercises was significantly more effective than home therapy alone for reducing both resting and stress-related pain (P < 0.001).

The benefits of manual therapy were maintained at follow-up periods ranging from 4 weeks to 1 year.

This review provides important evidence that manual therapy is an effective, low-cost, and non-invasive treatment option for TMD-related myofascial pain. While it may not be superior to all other treatments, manual therapy offers several advantages including safety, reversibility, and cost-effectiveness compared to more expensive options like botulinum toxin injections. The research suggests that combining manual therapy with patient education and counseling may provide the best outcomes. However, the quality of available evidence is limited, with all studies showing some risk of bias and significant differences in treatment approaches.

Clinicians can confidently offer manual therapy as a first-line treatment for TMD-related jaw pain, particularly when combined with patient education. More high-quality research is needed to establish clearer guidelines for optimal treatment protocols and to compare long-term effectiveness against other treatment options.