Which crown keeps kids' teeth cleaner? new trial pits steel against bioflex.
NCT ID NCT06767670
First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study looks at how two types of dental crowns—stainless steel and bioflex—affect oral hygiene and bacteria levels in children aged 4 to 8. Each child will get one crown of each type on opposite sides of the mouth. Researchers will measure plaque bacteria and gum health to see which crown leads to a cleaner mouth.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- What this could lead to
- If successful, this could help dentists choose the best crown type for children's teeth to maintain better oral hygiene and gum health.
- What could go wrong
- This is a small, early-stage study with only 40 children. It measures bacteria and gum health, not long-term tooth survival, so results may not change practice directly.
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.
- Participants
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About 40 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Oct 2026
An estimate. Start dates often move.
- Expected to finish
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Oct 2027
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.
Who is studied
A total of 10 patients 4-8 years old will be selected according to the established inclusion and exclusion criteria. The study will be conducted on patients attending the outpatient clinic of the pediatric dentistry department, Faculty of Dental Medicine Al-Azhar.
- Ages
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4 to 8 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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: * Participants aged between 4 and 8 years. * Pulp therapy treated primary molars on the contralateral side, requiring a full coverage restoration (split-mouth technique). * No history of any antibiotic consumption 2 weeks before the procedure. * No history of fluoride application 2 weeks before the procedure. Exclusion Criteria: * Special children with physical disabilities or emotional disturbances. * Children are diagnosed with systemic diseases. * Grossly destructed teeth with non-restorable crown structure. * Primary teeth with shedding or pathological tooth mobility.
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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
2 sites. 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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Al-Azhar University
RECRUITINGCairo, Nasr City, Egypt
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Faculty of Dental Medicine at Al-Azhar University.
NOT_YET_RECRUITINGCairo, Nasr City, Egypt
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