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Evaluation of Muscle Activity in Unilateral Posterior Crossbite

NCT04962685 · Status: UNKNOWN · Phase: NA · Type: INTERVENTIONAL · Enrollment: 100

Last updated 2021-10-22

No results posted yet for this study

Summary

Posterior crossbite (PCB) is defined as the presence of one or more teeth of the posterior group (canine to third molar) in an inverted buccolingual relationship, where the vestibular cusp of the upper tooth is in contact with the central fossa of its lower antagonist tooth. 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. It can be bilateral (MCPB) or unilateral (MCPU). In 71-84% of cases, CCM in growing patients appears as a functional CCBM and is therefore associated with a functional mandibular deviation.

The hypothesis of this study is, that unilateral posterior crossbite correction by Rapid Maxillary expansion achieves improved symmetry and muscle activation potential in treated patients.

The objective of this study is to evaluate the muscle activity of masticatory muscles in patients with unilateral posterior crossbite with superficial electromyography before and after treatment with rapid maxillary expansion.

Superficial electromyography will be measured in masseter and temporalis muscle before treatment, when the patients bite is corrected and after the treatment.

Three static and two dynamic tasks will be measured.

Conditions

  • Malocclusion
  • Muscle Activity
  • Maxillary Expansion

Interventions

OTHER

Rapid Maxillary Expansion

Subjects in the experimental group (with unilateral posterior crossbite) will be treated with Maxillary Rapid Expansion using a disjunctor fixed with two bands on the upper first permanent molars and a mesh cemented to the upper first premolars or upper first primary molars (depending on the eruptive stage of the patient). The breaker screw will be activated twice a day until a transverse overcorrection of 2 mm is achieved in the first permanent molars. When the active disjunction phase is completed, the screw will be blocked out with light-curing flowable resin and the patient will wear the cemented disjunctor as a retainer for a minimum of six months.

Sponsors & Collaborators

  • Universitat Internacional de Catalunya

    lead OTHER

Study Design

Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
9 Years
Max Age
15 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2021-11-30
Primary Completion
2022-07-01
Completion
2023-12-30

Countries

  • Spain

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 NCT04962685 on ClinicalTrials.gov