Masticatory Muscle Activity in Patients With Pain-related Temporomandibular Disorders

The aim of this study was to evaluate masticatory muscle electrical activity in patients with pain-related and pain-free temporomandibular disorders (TMD) as well as in subjects with no TMD. Ninety children with mixed dentition were recruited to the study. Of this total, 30 subjects were diagnosed with pain-related TMD, 30 with pain-free TMD, and 30 without TMD. We used Axis I of the Research Diagnostic Criteria for TMD (RDC/TMD) to assess the presence of TMD in the examined children. The electromyographical (EMG) potentials of the temporalis and masseter muscles were measured with a DAB-Bluetooth Instrument (Zebris Medical GmbH, Germany) at rest and during maximum voluntary clenching (MVC).

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Key information

Conditions

TMD

Age range

7 year–12 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Pomeranian Medical University, Department of Orthodontics

Szczecin, Poland

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

mixed dentition (the subjects should be aged between 7 and 12 years)
consent to participate voluntarily in the study

Exclusion criteria

subjects who had undergone orthodontic or masticatory motor system dysfunction treatment, had systemic or rheumatologic diseases, a history of mouth breathing, surgery, traumas or malformations in the head and neck region

Treatment and study plan

Electromyography

Diagnostic Test

Surface electromyography (sEMG) was used as an additional non-invasive tool for assessing patients with TMD.The electromyographical (EMG) potentials of the temporalis and masseter muscles were measured with a DAB-Bluetooth Instrument (Zebris Medical GmbH, Germany) at rest and during maximum voluntary clenching (MVC).

Primary outcomes

Electromyographic analysis of the masticatory muscles in patients with pain-related temporomandibular disorders

Time frame: For a single subject the whole EMG examination was taken 40 minutes.

A DAB-Bluetooth Instrument (Zebris Medical GmbH, Germany) was used to take electromyographical (EMG) recordings of the temporalis and masseter muscles at rest and during maximum voluntary contraction (MVC).Disposable, self-adhesive Ag/AgCl bipolar surface electrodes were placed at a fixed inter-electrode distance of 20 mm on the anterior temporal muscles and on the superficial masseter muscles parallel to the muscular fibres. The EMG signals were amplified, digitized and digitally filtered. The EMG results were analysed using the Student t-test, analysis of variance (ANOVA) and a Student-Newman-Keuls post-hoc test.

Sponsors and collaborators

Lead sponsor

Pomeranian Medical University Szczecin

Other

Registry information

Official study title

The Use of Electromyography in the Assessment of Masticatory Muscle Activity in Patients With Pain-related Temporomandibular Disorders

Important dates

Study start: 2019
Primary completion: 2020
Study completion: 2020
First posted: Jun 1, 2020
Registry last updated: Jun 1, 2020

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

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This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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Completed