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 range13 Years

SexALL

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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

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

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