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Dentoskeletal Effects of the Expander With Differential Opening and the Fan-type Expander

NCT03705871 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 48

Last updated 2019-04-18

No results posted yet for this study

Summary

This study will assess the dentoskeletal effects of two types of maxillary expanders in orthodontic patients in the mixed dentition, from 7 to 11 years old. Half of participants will be treated using the expander with differential opening, while the other half will undergo rapid maxillary expansion using the fan-type expander. The null hypothesis is that there is no difference between dentoskeletal effects of the two protocols.

Conditions

  • Malocclusion
  • Crossbite (Posterior)

Interventions

DEVICE

Differential Expansion

Twenty-four patients will be treated with a rapid maxillary expansion using the expander with differential opening. Appliance anchorage will be performed by bands adapted in the second maxillary deciduous molars and circumferential clamps will be bonded to the maxillary deciduous canines. The activation protocols will totalize an opening of 8mm in the anterior screw of the expander. 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

Fan-Fype Expander

Twenty-four patients will be treated with a rapid maxillary expansion using the fan-type expander. Appliance anchorage will be performed by bands adapted in the second maxillary deciduous molars and circumferential clamps will be bonded to the maxillary deciduous canines. The activation protocols will totalize an opening of 8mm screw of the expander. 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.

Sponsors & Collaborators

  • Fundação de Amparo à Pesquisa do Estado de São Paulo

    collaborator OTHER_GOV

  • Coordenação de Aperfeiçoamento de Pessoal de Nível Superior.

    collaborator OTHER_GOV

  • University of Sao Paulo

    lead OTHER

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
2017-11-08
Primary Completion
2018-12-15
Completion
2019-02-01

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 NCT03705871 on ClinicalTrials.gov