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Evaluation of Masticatory Muscle Activity in Pediatric Patients Undergoing Rapid Maxillary Expansion

NCT05820438 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 34

Last updated 2025-09-25

No results posted yet for this study

Summary

Transverse maxillary constriction is a malocclusion that subsists when the distance between the upper first molars palatal cuspids is lower than the distance between the lower first molars vestibular center fossae. Consequently it can be clinically expressed with a narrow and high palatal vault, a unilateral or bilateral crossbite, dental crowding, and/or reduced volume of the nasal cavities.

It is one of the most common malocclusions in children, with a prevalence of 8 to 22% among orthodontic patients in primary and mixed dentition and 5 to 15% among the general population. The hypothesis of this study is that transverse maxillary constriction correction by Rapid Maxillary Expansor achieves improved muscles activation potential in treated patients and improved symmetry in patient with unilateral crossbite. The aim of this study is to evaluate electromyographic activity of the masseter, anterior temporalis and suprahyoid muscles in clentching, chewing and swallowing in patients undergoing expansion therapy of the maxillary with rapid palatal expander. The electromyographic evaluation is carried out before the treatment (T0), at the end of the expansion (T1) and after 6 months from T1 (T2).

Conditions

  • Maxillar Hypoplasia

Interventions

DEVICE

Electromyography

Disposable bipolar surface electrodes will be used. The patient's skin will be clean with cotton gauze soaked in alcohol before electrodes placement to reduce skin impedance. The operator will palpate the muscle belly while the patient clenches his teeth and will position surface electrodes in parallel to the muscular fibres.Doing so the position of the electrodes results as follows: Masseters electrodes will be fixed parallel to the exocanthion-gonion line and with the upper pole of the electrode under the tragus-labial commissural line. Temporalis electrodes will be positioned along the anterior margin of the muscle (corresponding to the frontoparietal suture). Suprahyoid muscles electrodes will be placed in the submental area nearly 1 cm posterior to the mental symphysis, paramedian to the midline and lightly diverging. A reference electrode will be applied to the forehead of the patient.

Sponsors & Collaborators

  • University of Pavia

    lead OTHER

Principal Investigators

  • Andrea Scribante, DDS, PhD, Mac · University of Pavia

Study Design

Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
6 Years
Max Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2023-03-16
Primary Completion
2025-03-20
Completion
2025-03-30

Countries

  • Italy

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05820438 on ClinicalTrials.gov