NCT06372769

Myoelectric Activity and Mandibular Movement for the Diagnosis of Temporomandibular Disorder

Comparative Analysis of Myoelectric Activity and Mandibular Movement in Healthy and Temporomandibular Disorder Subjects

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 120 (actual)
• Sponsor: Stomatological Hospital Affiliated with Fujian Medical University · Academic / Other
• Sex: All
• Age: 20 Years – 35 Years
• Healthy volunteers: Accepted

Summary

This study aimed to provide normal reference values of surface electromyography (sEMG) and mandibular kinematics in Chinese young adults, compare the sex differences and assess the diagnosis value of these indices.

Detailed description

Temporomandibular disorders (TMD) are one of the leading causes of craniofacial pain, and a high incidence of TMD in young adults has been reported. Previous studies have used sEMG and mandibular kinematic analysis to diagnose TMD. This was an observational study that healthy young adults with individual normal occlusion were strictly selected by diagnosis standard, and TMD patients with disc displacement were recruited. The sEMG signals of the anterior temporalis (TA), masseter (MM), and sternocleidomastoid and digastric were recorded in the mandibular postural positions (MPP) and during maximal voluntary clenching (MVC) with K7 electromyograph. Mandibular kinematics, including maximum opening and opening/closing velocities, were assessed by K7 kinesiograph.

Conditions

• Temporomandibular Disorder

Interventions

Type	Name	Description
DIAGNOSTIC_TEST	electromyograph and kinesiograph	The sEMG of the anterior temporalis (TA), masseter (MM), sternocleidomastoid (cervical group, CG), and digastric (DA) were recorded simultaneously with an sEMG device (K7/EMG, USA) using disposable silver/silver chloride bipolar surface electrodes. First, sEMG was conducted on four pairs of muscles (TA, MM, CG, and DA) in the MPP, and subjects were guided to maintain the face and jaw as relaxed as possible. To determine the relative efficiency of muscle function, the second test was performed to measure the sEMG of TA and MM during the maximal biting force against natural dentition. In the third test, subjects were guided to clench three times to monitor early motor unit recruitment as they closed from rest through freeway space to initial tooth contact. Kinesiographic recordings were performed using a kinesiograph (K7/Computerized Mandibular Scanning (CMS), USA) that measured the maximum mouth opening (MMO) and opening and closing velocities.

Timeline

• Start date: 2022-02-01
• Primary completion: 2022-07-15
• Completion: 2023-02-10
• First posted: 2024-04-18
• Last updated: 2024-04-18

Locations

1 site across 1 country: China