Clinical Effectiveness of Bonded Versus Vacuum-formed Retainers
NCT ID: NCT04847323
Last Updated: 2022-07-05
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
50 participants
INTERVENTIONAL
2021-02-01
2022-04-01
Brief Summary
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The null hypotheses considered that there was no differences between the retainers in relation to the aspects evaluated.
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Detailed Description
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A total of 50 patients completing orthodontic treatment were recruited. The patients were prospectively and randomly allocated into two groups. The first group consisted of 25 patients with canine-to-canine V-bend bonded retainers; while the second group comprised 25 patients with vacuum-formed retainers. In both groups, the same retainers were installed in the maxillary and mandibular arches.
Patients were evaluated at deboning (T0), after 3 months (T1), 6 months (T2), and 12 months (T3). In each appointment, digital models were obtained and the other clinical variables were evaluated. The primary and secondary outcomes were compared between retainers in the time-points evaluated.
Conditions
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Study Design
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RANDOMIZED
PARALLEL
Group 1: Bonded V-bend retainers. Group 2: Vacuum-formed retainers. Randomization was performed through sequentially numbered, opaque envelopes prepared by a colleague independent of the study.
TREATMENT
SINGLE
Study Groups
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V-bend Bonded Retainer
The V-bend retainer was bonded in the lingual surface of the anterior teeth. The retainer was constructed using 0.024" stainless steel wires. Differently from the conventional bonded retainers, this retainer presents V-bends in the sagittal direction, parallel to the occlusal plane in each interproximal contact point of the incisors and canines.
The retainers was bonded after adequate etching with phosphoric acid and application of adhesive with a low viscosity resin.
V-bend Bonded Retainer
Traditional stainless steel retainer commonly bonded in the anterior teeth of the mandibular arch to maintain their alignment after orthodontic treatment.
Vacuum-formed Retainer
The removable Vacuum-formed retainers were made of acetate 1mm thickness. They were made at the same appointment of debonding using plaster models. The patients were instructed to use the retainers only during nights.
Vacuum-formed Retainer
Removable retainers made of plastic and derivatives. Currently gaining popularity due to the increased use of esthetic aligners. These clear retainers have the objective to maintain stable the results obtained after orthodontic treatment. They cover all the surfaces of the teeth up to the first or second molars.
Interventions
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V-bend Bonded Retainer
Traditional stainless steel retainer commonly bonded in the anterior teeth of the mandibular arch to maintain their alignment after orthodontic treatment.
Vacuum-formed Retainer
Removable retainers made of plastic and derivatives. Currently gaining popularity due to the increased use of esthetic aligners. These clear retainers have the objective to maintain stable the results obtained after orthodontic treatment. They cover all the surfaces of the teeth up to the first or second molars.
Other Intervention Names
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Eligibility Criteria
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Inclusion Criteria
* Acceptable oral hygiene (assessed through clinical examination).
* Presence of all teeth up to the second molars.
* Clinically acceptable teeth alignment.
Exclusion Criteria
* Patients with facial deformities.
* Initial malocclusion that required extreme corrections, large transverse expansions or orthognathic surgery.
* History of periodontal diseases.
12 Years
ALL
Yes
Sponsors
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University of Sao Paulo
OTHER
Responsible Party
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Silvio Augusto Bellini-Pereira
Principal Investigator
Locations
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Bauru Dental School, University of São Paulo
Bauru, São Paulo, Brazil
Countries
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Other Identifiers
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001
Identifier Type: OTHER_GRANT
Identifier Source: secondary_id
22092919.7.0000.5417
Identifier Type: -
Identifier Source: org_study_id
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