CompletedNot Applicable

Clinical Effectiveness of Bonded Versus Vacuum-formed Retainers

Brazil50 participantsStarted 2021-02-01

Plain-language summary

The purpose of the study was to compare the clinical effectiveness of bonded versus vacuum-formed retainers regarding their retention capacity; periodontal health; survival rates; and patients' perception after 12 months of removal of fixed appliances. The null hypotheses considered that there was no differences between the retainers in relation to the aspects evaluated.

Who can participate

Age range

12 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * Patients with the proper completion of orthodontic treatment and correction of the initial malocclusion. * Acceptable oral hygiene (assessed through clinical examination). * Presence of all teeth up to the second molars. * Clinically acceptable teeth alignment. Exclusion Criteria: * Patients with any systemic condition that may have an influence on periodontal health. * Patients with facial deformities. * Initial malocclusion that required extreme corrections, large transverse expansions or orthognathic surgery. * History of periodontal diseases.

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Changes in Little Irregularity Index (LII)

Timeframe: Changes were compared at T0 (Debonding); T1 (3 Months Follow-up); T2 (6 Months Follow-up); and T3 (12 Months Follow-up).

Trial details

NCT IDNCT04847323

SponsorUniversity of Sao Paulo

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2022-04-01

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