Can removing a baby tooth or widening the jaw save kids from surgery?
NCT ID NCT06267989
First seen Sep 09, 2026 · Last updated Sep 10, 2026 · Updated 1 time
Summary
About 2 to 3 in 100 children have an upper adult canine tooth that gets stuck in the roof of the mouth instead of coming down. Dentists often remove the baby canine to try to guide the adult tooth into place, but the evidence for this is weak. This trial compares removing the baby tooth with widening the upper jaw using a rapid maxillary expander, and it also looks at whether either approach saves money. Researchers will follow 324 children for 18 months to see how many still need surgery to uncover the tooth.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Extraction of the primary canine teeth or expansion of the maxilla with a rapid maxillary expander
- What this could lead to
- If either approach works, children with a displaced canine tooth could avoid surgery under general anaesthetic and extensive brace treatment to straighten the tooth.
- What could go wrong
- The evidence for these approaches is weak, and the trial may show that neither reliably helps the tooth erupt. Children may still need surgery and braces.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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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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About 324 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Oct 2024
- Expected to finish
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Dec 2032
An estimate. End dates often move.
- 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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10 to 12 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: * One or both upper permanent canine teeth are not palpable or there is a pronounced difference in the eruption between the left and right side. Dental radiographs will be taken to confirm that the permanent tooth is displaced. Canines in sector 5 are going to be excluded from this trial. Exclusion Criteria: * Buccal displacement of the canine(s), missing permanent lateral incisors; severe upper arch dental crowding (\>2mm in each affected quadrant) or associated pathology.
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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.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
3 sites in 3 countries. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Gothenbrug University
RECRUITINGGothenburg, Sweden
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Private practice
NOT_YET_RECRUITINGTraben-Trarbach, Germany
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University of Sheffield
NOT_YET_RECRUITINGSheffield, United Kingdom
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