Myoelectric Activity and Mandibular Movement for the Diagnosis of Temporomandibular Disorder

Completed

• Conditions: Temporomandibular Disorder
• Interventions: Diagnostic Test: electromyograph and kinesiograph

• Registration Number: NCT06372769
• Lead Sponsor: Stomatological Hospital Affiliated with Fujian Medical University

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.

Study Timeline

• Study Start: 2022-02-01
• Primary Completion: 2022-07-15
• Study Completion: 2023-02-10
• Status Verified: 2024-04
• Study First Submitted: 2024-04-12
• Study First Submitted QC: 2024-04-16
• Last Update Submitted: 2024-04-16
• Study First Posted: 2024-04-18
• Last Update Posted: 2024-04-18

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 120

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.

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Healthy young adults with individual normal occlusion	electromyograph and kinesiograph	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.
Temporomandibular disorder patients with disc displacement	electromyograph and kinesiograph	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.

Primary Outcome Measures

Name	Time	Method
Surface electromyography (μV)	3 days	The sEMG of the anterior temporalis (TA), masseter (MM), sternocleidomastoid (cervical group, CG), and digastric (DA) during mandibular postural position and maximal clench were recorded.

Secondary Outcome Measures

Name	Time	Method
Mandibular kinematics (mm, mm/s)	3 days	Kinesiographic recordings were performed using a kinesiograph, the maximum mouth Maximal opening, maximal and average opening and closing velocities were measured.

Trial Locations

Locations (1)

The Affiliated Stomatological Hospital of Fujian Medical University; 🇨🇳 Fuzhou, Fujian, China