Indian Journal of Public Health Research & Development

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Comparison of Electrical Activity of Masticatory Muscles in Clinically Diagnosed Temporomandibular Joint Dysfunction


Affiliations
1 Department of Prosthodontics, C.D.C.R.I. Rajnandgaon, Chhattisgarh, India
2 Siksha ‘O’ Anusandhan (Deemed to be University), Bhubaneswar, Odisha, India
3 Center for Advanced Dento-Facial and Gnathological Science (CADSS). Mangalore, Karnataka, India
4 Department of Oral Medicine and Radiology, S.C.B. Dental College & Hospital, Cuttack, Odisha, India
5 Department of Oral Pathology & Microbiology, Institute of Dental Sciences, Siksha ‘O’ Anusandhan (Deemed to be University), Bhubaneswar, Odisha, India
     

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Background: Surface electromyography (EMG) has been found to be an effective tool to evaluate Masticatory muscle activity in order to diagnose dysfunction of masticatory apparatus.

Aim: The current study aims to indicate the practical difference between temporomandibular joint (TMJ) disorder and muscles of the jaw on symptomatic and asymptomatic subjects by comprehensive electromyography analysis.

Method: To evaluate the significance of EMG parameters, jaw-muscles EMGs were recorded in 10 normal (Group N) subjects and 10 TMD symptomatic (group S).

Result: In TMD symptomatic (Group S), at rest position (RP) the integrated (IEMG) was larger within anterior temporalis (Ta) whereas maximal voluntary clenching (MVC) was smaller and the masseter (Ma) and temporalis (Ta) was protruded (P).

Interpretation and Conclusion The functional efficiency is weak and may have hypertonic activities of the jaw elevators in TMD. Following a muscle twitch, the jaw muscles in TMD become less relaxed and get easily fatigued during functional effort. TMD symptoms result in alteration of functional adaptation of jaw muscle activities and occlusion.


Keywords

Electromyography, Temporomandibular Disorders, Muscle Engram, Muscle Fatigue.
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  • Comparison of Electrical Activity of Masticatory Muscles in Clinically Diagnosed Temporomandibular Joint Dysfunction

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Authors

Anurag Dani
Department of Prosthodontics, C.D.C.R.I. Rajnandgaon, Chhattisgarh, India
Priyanka Debta
Siksha ‘O’ Anusandhan (Deemed to be University), Bhubaneswar, Odisha, India
N. Shetty Sridhar
Center for Advanced Dento-Facial and Gnathological Science (CADSS). Mangalore, Karnataka, India
Fakir Mohan Debta
Department of Oral Medicine and Radiology, S.C.B. Dental College & Hospital, Cuttack, Odisha, India
Manoranjan Dash
Siksha ‘O’ Anusandhan (Deemed to be University), Bhubaneswar, Odisha, India
Somalee Mahapatra
Department of Oral Pathology & Microbiology, Institute of Dental Sciences, Siksha ‘O’ Anusandhan (Deemed to be University), Bhubaneswar, Odisha, India

Abstract


Background: Surface electromyography (EMG) has been found to be an effective tool to evaluate Masticatory muscle activity in order to diagnose dysfunction of masticatory apparatus.

Aim: The current study aims to indicate the practical difference between temporomandibular joint (TMJ) disorder and muscles of the jaw on symptomatic and asymptomatic subjects by comprehensive electromyography analysis.

Method: To evaluate the significance of EMG parameters, jaw-muscles EMGs were recorded in 10 normal (Group N) subjects and 10 TMD symptomatic (group S).

Result: In TMD symptomatic (Group S), at rest position (RP) the integrated (IEMG) was larger within anterior temporalis (Ta) whereas maximal voluntary clenching (MVC) was smaller and the masseter (Ma) and temporalis (Ta) was protruded (P).

Interpretation and Conclusion The functional efficiency is weak and may have hypertonic activities of the jaw elevators in TMD. Following a muscle twitch, the jaw muscles in TMD become less relaxed and get easily fatigued during functional effort. TMD symptoms result in alteration of functional adaptation of jaw muscle activities and occlusion.


Keywords


Electromyography, Temporomandibular Disorders, Muscle Engram, Muscle Fatigue.