Myogenic Temporomandibular Joint Disorders

This study aims to evaluate whether intramuscular injections of platelet-rich plasma (PRP) are more effective than isotonic saline in reducing pain and improving jaw function in individuals diagnosed with myogenous temporomandibular disorders (TMD). Myogenous TMD is a common source of orofacial muscle pain and functional limitation, and although conservative treatments help many patients, a significant proportion continue to experience persistent symptoms that affect daily life and quality of function. PRP is an autologous, minimally invasive biologic concentrate enriched with platelets and bioactive molecules that may promote tissue repair and modulate inflammation, making it a promising option for managing muscle-related pain conditions. However, evidence from well-controlled randomized clinical trials in myogenous TMD remains limited. In this double-blind, randomized controlled clinical trial, participants will receive two intramuscular injections-either PRP or saline-administered one month apart. Follow-up assessments will occur at 1, 3, and 6 months using standardized and validated measures of pain intensity, pain sensitivity, mandibular function, and psychosocial factors. The results of this study may help determine the clinical value of PRP for myogenous TMD and contribute to future standardization of regenerative treatment protocols in orofacial pain management.

Rocabado's 6x6 exercises are designed to improve muscular co-ordination, relax tense muscles, increase temporomandibular joint (TMJ) ROM, alter the jaw closure pattern and muscle strength. These exercises have been found to be beneficial in reducing pain and increasing masticatory muscle function, as well as restoring restricted joint mobility, muscle length limitation, and postural and functional limitations. In addition, low level laser therapy (LLLT) has been reported to reduce inflammation and pain in patients with TMJ dysfunction. Although that to the best of the authors' knowledge the combined effect of Rocabado's approach with LLLT has not been studied. So, the current study is the first double-blind placebo-controlled clinical trial that investigating the effect of adding LLLT to Rocabado's approach for TMJ myogenic disorders.