Myoelectric Activity and Mandibular Movement for the Diagnosis of Temporomandibular Disorder

NCT ID: NCT06372769

Last Updated: 2024-04-18

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 120 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2022-02-01
• Study Completion Date: 2023-02-10

Brief 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

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: CROSS_SECTIONAL

Study Groups

Healthy young adults with individual normal occlusion

Healthy subjects who fulfilled the following criteria: centred midline and no marked restriction and deviation of mouth opening and closing; overjet and overbite of 1-3 mm, bilateral molar support with molar and cusp relation of Angle's class I, and presence of complete permanent dentition, except third molars.

electromyograph and kinesiograph

Intervention Type: DIAGNOSTIC_TEST

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.

Temporomandibular disorder patients with disc displacement

Patients with unilateral or bilateral temporomandibular joint (TMJ) disc displacement symptoms, such as TMJ clicking, TMJ locking, and limitation in opening mouth were included in the study. The study did not cover the patients with muscle disorders (myofascial pain), with arthralgia, osteoarthritis, and osteoarthrosis, with TMJ fracture, with dentofacial deformity, with systemic disease affecting TMJ, and undergone TMD treatments.

electromyograph and kinesiograph

Intervention Type: DIAGNOSTIC_TEST

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.

Interventions

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.

Intervention Type: DIAGNOSTIC_TEST

Eligibility Criteria

Inclusion Criteria

• Centred midline and no marked restriction and deviation of mouth opening and closing; ·Overjet and overbite of 1-3 mm, bilateral molar support with molar and cusp relation of Angle's class I;
• Presence of complete permanent dentition, except third molars.

Exclusion Criteria

• History of local or general trauma;
• Presence of systemic diseases, neurological or psychiatric disorders, muscular diseases, cervical pain, or TMD based on the Research Diagnostic Criteria (RDC);
• Pregnancy;
• Consumption of anti-inflammatory, analgesic, antidepressant, or myorelaxant drugs;
• Presence of parafunctional facets and anamnesis of parafunctional tooth clenching, bruxism, or unilateral chewing;
• Presence of obvious dentition crowding or spacing, malposed, supernumerary or fractured tooth, visible caries, tooth abrasion/hypersensitivity, toothache, periodontal disease, or occlusal discomfort;
• Fixed or removable restorations, tooth filling, or occlusal adjustment that affected the occlusal surfaces;
• Previous or concurrent orthodontic, orthognathic, or TMJ treatment.

• Minimum Eligible Age: 20 Years
• Maximum Eligible Age: 35 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Stomatological Hospital Affiliated with Fujian Medical University

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

The Affiliated Stomatological Hospital of Fujian Medical University

Fuzhou, Fujian, China

Countries

China

References

Xiaojie X, Yiling C, Honglei L, Jiamei P, Xiaoyong W, Hao Y, Hui C. Comparative analysis of myoelectric activity and mandibular movement in healthy and nonpainful articular temporomandibular disorder subjects. Clin Oral Investig. 2024 Oct 21;28(11):605. doi: 10.1007/s00784-024-05957-z.

Reference Type: DERIVED

PMID: 39428401 (View on PubMed)

Other Identifiers

20240304

Identifier Type: -

Identifier Source: org_study_id