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Analysis of the Dentoskeletal Effects of the Expander With Differential Opening

NCT02810353 · Status: UNKNOWN · Phase: NA · Type: INTERVENTIONAL · Enrollment: 50

Last updated 2016-06-22

No results posted yet for this study

Summary

This study evaluates the dentoskeletal effects of the expander with differential opening in orthodontic patients in the mixed dentition. Half of participants will undergo rapid maxillary expansion (RME) using the expander with differential opening, while the other half will undergo RME using the conventional Hyrax expander.

Conditions

  • Maxillary Constriction
  • Unilateral Posterior Crossbite
  • Bilateral Posterior Crossbite
  • Mandibular Dental Arch Constriction

Interventions

DEVICE

Differential rapid maxillary expansion

Twenty-five patients will be submitted to rapid maxillary expansion using the expander with differential opening. Appliance anchorage will be provided by bands adapted either on the maxillary first permanent molars or on the second deciduous molars and circumferential clamps will be bonded to the maxillary deciduous canines. If the maxillary second deciduous molars will be banded, a lingual extension wire will be placed in the partially erupted maxillary first permanent molars. Both anterior and posterior screws will be activated with a complete turn a day during 6 days. Then, only the anterior screw will be additionally activated for 4 more days. After the active period of RME, the screws will be fixed with acrylic resin and the appliance will be kept as a retainer for 6 months.

DEVICE

Conventional rapid maxillary expansion

Twenty-five patients will undergo rapid maxillary expansion using conventional Hyrax expander. Bands will be adapted either on the maxillary first permanent molars or on second deciduous molars and circumferential clamps will be bonded to the maxillary deciduous canines. Similarly to the experimental group, a lingual extension wire will be placed in the partially erupted maxillary first permanent molars if the maxillary second deciduous molars will be banded. The expander screw will be activated with a complete turn a day during 6 days. After the expansion active phase, the screw will be fixed with acrylic resin and the appliance will be kept in the dental arch as a retainer for 6 months.

Sponsors & Collaborators

  • University of Sao Paulo

    lead OTHER

Principal Investigators

  • Arthur Alves, DDS, MSc · Bauru Dental School, University of São Paulo

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
7 Years
Max Age
11 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2015-05-31
Primary Completion
2016-12-31
Completion
2018-02-28

Countries

  • Brazil

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 NCT02810353 on ClinicalTrials.gov