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Dental technology

Dental Electromyography

Jaw-muscle recordings can add detail to a pain assessment, although pain itself can make the signal less reliable.

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The short answer

Dental electromyography records chewing-muscle electrical activity and can contribute to an assessment of pain-related temporomandibular disorders.

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Dental Electromyography dental educational illustration

What is dental electromyography?

What a surface EMG recording can examine
QuestionAnswer
What is measured?Electrical activity associated with chewing-muscle activity.[1]
What condition has been studied?Pain-related temporomandibular disorders involving ongoing pain in jaw muscles, the joint, or nearby structures.[1]

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How might a dentist use it?

The test records masticatory muscle activity. Pain-related temporomandibular disorders can involve persistent pain in the chewing muscles, the jaw joint, or nearby tissues, and altered muscle activation has been reported in this group.

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Questions different digital measurements address
MeasurementPatient question
Surface electromyographyWhat muscle activity is recorded?[1]
Digital occlusal analysisWhat does the reviewed occlusal-analysis literature examine?[1][4]

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What are the limits?

Pain may change electromyographic activity and increase variation in the signal. That variation can reduce the accuracy and reliability of a surface EMG assessment.

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What other assessment tools may be discussed?

Electromyography records masticatory muscle activity. Digital occlusal analysis examines the bite, so the two measurements address different parts of a temporomandibular disorder assessment.

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What does the result mean for a patient?

The result reflects muscle activity during the recording, rather than locating every source of jaw pain. Pain can affect the signal itself, which limits certainty from a variable tracing alone.

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Is dental electromyography safe?

The main safety-relevant issue is interpretation: pain-related TMD can be difficult to diagnose, and pain can change the recorded EMG activity. A variable recording should not be treated as a precise explanation for every symptom.

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Frequently asked questions

Does an EMG result tell me exactly why my jaw hurts?

No. It records chewing-muscle activity, while pain-related temporomandibular disorders may involve the muscles, jaw joint, or nearby structures and can be difficult to diagnose.

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