Assessment of Correlation Between Changes of Shear Wave Elastography and Surface Electromyogram of the Masseter

Assessment of Correlation Between Changes of Shear Wave Elastography and Surface Electromyogram of the Masseter, in Rest and Maximal Voluntary Contraction

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT02425839

Acronym

EVEREST

Enrollment

Registered

2015-04-24

Start date

2015-05-31

Completion date

2015-05-31

Last updated

2015-11-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Masseter Muscle Spasm

Keywords

shear wave elastography, surface electromyogram, masseter

Brief summary

Diagnoses and follow up of muscles diseases lack imaging. Severity assessment of masticatory dysfunction and follow up of treatment effectiveness is currently based only on clinical features. Supersonic ShearWave Imaging® is a new, non-invasive, non-irradiating and dynamic imaging technique that uses ultrasound and allows shear wave elastic modulus in a muscle in order to study its viscoelastic properties. In this study, the investigators study the correlation between changes of shear wave elastography modulus and surface electromyogram features of the masseters between rest and maximal voluntary contraction.

Interventions

DEVICEUltrasound exam by Supersonic Shear Imaging® technique

Each of the two observers performs twice ultrasound examination and measures of the masseter thickness and its elastic modulus, at rest and maximal voluntary contraction.

DEVICEEMG examination by electromyograph Keypoint system

Experimented neurologist performs EMG examination.

Study design

Allocation

Intervention model

SINGLE_GROUP

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

20 Years to 40 Years

Healthy volunteers

Inclusion criteria

* People with social security. * People aged 20 to 40 years, of both sexes. * People that gave and signed consent to participate in the study.

Exclusion criteria

* Any concomitant muscle disease (myopathy, myositis…) * Botulinum toxin injections in the masseter in the last 3 months preceding the study. * Any treatment that induces muscular effect (baclofen, benzodiazepine) * Bruxism or any masticatory apparatus disease * Any surgery of the masticatory apparatus

Design outcomes

Primary

Measure	Time frame
Elastic modulus using Supersonic Shear Imaging® technique on superficial and deep masseter parts at rest and maximal voluntary contraction.	Day 1 (inclusion day)

Secondary

Measure	Time frame
Thickness of the whole masseter mesured by Supersonic Shear Imaging® technique	Day 1 (inclusion day)
Thickness of the masseter superficial part mesured by Supersonic Shear Imaging® technique	Day 1 (inclusion day)
Thickness of the masseter deep part mesured by Supersonic Shear Imaging® technique	Day 1 (inclusion day)

Countries

France

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026