CompletedNot Applicable

Comparison of Modified Vacuum-formed Retainers Versus Hawley Retainer

Malaysia35 participantsStarted 2019-08-01

Plain-language summary

This study will focus on the relapse of arch width in two types of retention regimes, which are modified vacuum-formed retainers and Hawley type retainers in patients after fixed appliance treatment in transverse arch expansion cases. This will subsequently be of valuable information for clinicians in choosing the appropriate type of retainers after removal of their fixed appliances. This is because the modified vacuum-formed retainers will be significantly cheaper, quicker and easier to fabricate.

Who can participate

Age range

13 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 who are at least 13 years old at time of debond.
. Treatment plan of extraction or non-extraction followed by straight wire appliances in the upper arch only or both arches
. Undergone more than 3mm of maxillary dentoalveolar expansion. Initially, the amount of arch width expansion was measured intraorally at debond and compared to their respective pre-treatment dental casts. To ensure accuracy, the measurements were repeated on debond and pre-treatment dental casts. The following linear arch width measurements were made: intercanine width (ICW - the distance between the canine cusp tips), interpremolar width (IPMW - the distance between the premolar cusp tips), interfirst molar width 1 (IFMW1 - the distance between the mesiobuccal cusp), and interfirst molar width 2 (IFMW2 - the distance between the distobuccal cusp). At least two or more points were expanded (\> 3mm) to be included in the trial.
. No chronic medical conditions

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

Arch Width

Timeframe: 24-month post-debond

Trial details

NCT IDNCT04237298

SponsorNational University of Malaysia

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2021-08-31

Results submitted2022-03-21

View on ClinicalTrials.gov More Orthodontic Retainers trials