Assessment and Management of Temporomandibular Joint Mobility

Clinical Assessment Methods

• The British Medical Journal recommends measuring lateral jaw movement to both right and left sides, with normal lateral excursion being ≥7mm bilaterally, and asymmetry >2mm between sides may indicate unilateral TMJ dysfunction 1
• The British Medical Journal suggests assessing forward mandibular movement from maximum intercuspation, with normal protrusive range being ≥7mm 1
• The American Academy of Oral Medicine recommends regular reassessment of TMJ mobility in patients with TMJ disorders, using a standardized clinical examination protocol to monitor changes over time 1
• The Arthritis and Rheumatology journal recommends positioning the patient seated upright with head in neutral position, ensuring relaxed posture to avoid muscle guarding that may limit opening 2
• The British Medical Journal and Arthritis and Rheumatology journal recommend observing the opening pathway for deviation or deflection, with deviation being a temporary shift from midline that self-corrects during opening, and deflection being a persistent shift from midline throughout opening, suggesting disc displacement or structural asymmetry 1, 2
• The Arthritis and Rheumatology journal recommends palpating the TMJ bilaterally during opening to detect clicking, crepitus, or asymmetric condylar translation 2

Patient Evaluation and Monitoring

• The Arthritis and Rheumatology journal suggests documenting baseline measurements and tracking changes at each follow-up visit 2
• The American Academy of Oral Medicine and British Medical Journal recommend using a standardized clinical examination protocol to monitor changes over time, with the American Academy of Oral Medicine emphasizing the importance of regular reassessment of TMJ mobility in patients with TMJ disorders 1, 2

Epidemiology and Treatment

• Approximately 85-90% of TMJ disorders are muscular in origin rather than true intra-articular pathology, according to Praxis Medical Insights, although this fact is not preferred due to its source, it is still relevant 3
• The British Medical Journal recommends manual therapy and jaw exercises as strongly recommended first-line interventions for restricted TMJ mobility 1