3D-Printed retainers take on traditional wires in new study
NCT ID NCT07538869
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study compared custom 3D-printed metal fixed retainers to conventional wire retainers in 64 people who had finished orthodontic treatment. The main goal was to see how often the retainers came loose (bond failure) and how long they took to place. The 3D-printed retainers are designed from digital scans for a precise fit, but long-term evidence is still limited.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- 3D-printed metal fixed retainer (device)
- What this could lead to
- If successful, 3D-printed retainers could offer a more precise fit and potentially fewer bond failures than traditional wire retainers.
- What could go wrong
- This is a small, completed trial with only 64 participants, so results may not apply to everyone. Long-term data is still limited.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
-
Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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64 people
The number who actually took part.
- Started
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Apr 2025
- Finished
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Oct 2025
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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13 to 35 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Age ≥ 13 years * Complete permanent dentition up to second molars * Completed Class I orthodontic treatment and requiring a mandibular fixed -bonded retainer * No sex predilection. Exclusion Criteria: * Enamel defects that may compromise bonding (e.g., hypoplasia, fluorosis) * Poor oral hygiene * Active dental or periodontal pathology at the site of intervention * Lingual restorations on mandibular anterior teeth * Poor compliance or inability to attend follow-up visits * Psychological or medical conditions that may interfere with study participation
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Amany Eltantawy
Giza, Cairo University, Egypt
More trials for these conditions
Other studies related to the condition(s) this trial covers.