About this trial
This planned randomized, single-blind clinical trial will investigate the effects of adding the Post-Isometric Relaxation (PIR) technique to a standard postural exercise program in individuals with moderate to severe temporomandibular joint dysfunction (TMD). Forty volunteers aged 18-25 years will be recruited and randomly assigned to either an experimental group (postural exercises + PIR) or a control group (postural exercises only). The intervention will be delivered three times per week for six weeks. Primary outcomes will include cervical range of motion, mandibular mobility, head anterior tilt, and thoracic kyphosis index, measured before and after the intervention. The study aims to determine whether PIR provides additional benefits to standard postural exercises in improving jaw and neck function and postural alignment in young adults with TMD.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Age between 18 and 25 years
Diagnosis of moderate or severe temporomandibular joint dysfunction (TMD) according to the Fonseca Anamnestic Questionnaire
Presence of TMD symptoms for at least 6 months
No TMD treatment received within the last 6 months
Disqualifiers
History of jaw or facial trauma within the past year
History of temporomandibular joint surgery
Presence of systemic rheumatologic, neurological, or musculoskeletal disorders affecting the jaw, neck, or spine
Pregnancy
Trial design
Parallel
Treatments tested in this trial
Postural Exercises + Post-Isometric Relaxation (PIR) Technique
BehavioralParticipants will perform a standardized postural exercise program (strengthening, stretching, and mobility exercises for the cervical and thoracic regions) three times per week for six weeks. In addition, the Post-Isometric Relaxation (PIR) technique will be applied to jaw muscles during each session to reduce muscle tension and improve mandibular mobility.
Postural Exercises
BehavioralParticipants will perform a standardized postural exercise program designed to improve cervical and thoracic mobility and postural alignment. The program will include strengthening, stretching, and mobility exercises targeting the cervical spine, thoracic spine, and related musculature. Each session will last approximately 30-40 minutes and will be conducted three times per week for six weeks under the supervision of a trained therapist.
Treatment groups
Trial outcomes
Primary outcomes
Change in mandibular depression (mouth opening)
The distance between the upper and lower central incisors during maximal mouth opening will be measured in millimeters using a caliper.
Change in cervical range of motion
Cervical range of motion will be measured in degrees using a goniometer. Movements assessed will include flexion, extension, right and left lateral flexion, and right and left rotation.
Change in mandibular lateral deviation (right and left)
The horizontal movement of the lower jaw to the right and left will be measured in millimeters using a caliper.
Change in mandibular protrusion
The anterior translation of the mandible will be measured in millimeters using a caliper. Outcome Measure: Change in head anterior tilt - chin-sternum distance
Locations
Sponsors and contacts
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Sanem ŞENER
Lead sponsor
Bulent Ecevit University
Sponsor institution
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