Upper cervical spine mobility plays a crucial role in temporomandibular joint (TMJ) function. This observational study investigates the relationship between upper cervical spine mobility and TMJ range of motion in patients diagnosed with temporomandibular disorders (TMD). Cervical hypomobility may restrict mandibular movement and contribute to TMJ dysfunction through shared biomechanical and neuromuscular mechanisms.
Medically stable individuals who consent to participate in the study.
Age between 18 and 50 years.
Both male and female participants.
Patients diagnosed with temporomandibular joint (TMJ) dysfunction for at least three months.
Presence of systemic diseases.
Body mass index (BMI) greater than 30 kg/m².
Pregnancy.
Recent physical therapy for cervical spine disorders, headaches, or temporomandibular dysfunction.
Participants will be adult patients (both male and female) aged 18 to 50 years who have been clinically diagnosed with temporomandibular joint (TMJ) dysfunction for more than three months. All participants will be recruited from the outpatient clinic of the Faculty of Physical Therapy, Deraya University, Minya, Egypt. Eligible participants will be medically stable and free from systemic or neurological disorders that could affect cervical or temporomandibular mobility.
Other
Cross-sectional
Not listed
Upper Cervical Spine Mobility
Upper cervical spine mobility (flexion, extension, and left and right rotation) will be measured in degrees using a CROM device. Participants will be seated in an upright position, and each movement will be measured twice following standardized procedures. The mean value of both readings will be used for analysis.
Temporomandibular Joint Range of Motion (TMJ ROM)
TMJ range of motion will be measured in millimetres using a standard ruler or digital calliper. Measurements include maximum mouth opening, lateral excursion (left and right), and protrusion. Each measurement will be taken twice, and the average will be recorded in millimetres to ensure reliability.
Correlation Between Upper Cervical Mobility and TMJ Range of Motion
The relationship between upper cervical spine mobility (measured in degrees using the CROM device) and TMJ range of motion (measured in millimetres using a ruler or calliper) will be analysed statistically. Pearson or Spearman correlation coefficients will be applied, depending on data normality, to determine the strength and direction of association.
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