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Which crown lets kids bite stronger? trial tests two dental materials

NCT ID NCT07825103

Symptom relief Sponsor: Tanta University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Sep 17, 2026 · Last updated Sep 18, 2026 · Updated 1 time

Summary

Researchers compare two types of preformed crowns for repairing back baby teeth in children aged 4 to 7 who need full dental treatment under general anesthesia. Each child receives either Bioflx or zirconia crowns on their primary molars. The team measures bite force before treatment and at follow-up visits using a digital occlusal analysis system, and also checks how the teeth contact each other. The goal is to see which crown material better restores normal chewing function.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
preformed pediatric dental crowns made of Bioflx or zirconia
What this could lead to
If one crown type restores bite force better, dentists could choose it to help children chew normally after treatment.
What could go wrong
This is a small study of 30 children at one center, so the results may not apply to all kids or all dental practices. Bite force can also vary with age, cooperation, and healing.

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

About 30 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Oct 2026

An estimate. Start dates often move.

Expected to finish

Jan 2027

An estimate. End dates often move.

Lead sponsor

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

4 to 7 years

Sex

Anyone

Healthy volunteers

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

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Children aged 4-7 years. * Children requiring comprehensive dental treatment under general anesthesia. * Children requiring full-coverage restoration of one or more primary molars with a preformed pediatric crown. * Primary molars with sufficient remaining tooth structure to support full-crown restoration. * Children with a generally healthy medical status and suitable for treatment under general anesthesia. * Parents or legal guardians willing to provide written informed consent for participation in the study. Exclusion Criteria: * Children with systemic diseases or medical conditions that may affect oral health, occlusal function, or the ability to undergo general anesthesia. * Children with craniofacial anomalies or developmental conditions that may significantly affect occlusion or bite force. * Primary molars with inadequate remaining tooth structure for full-crown restoration. * Teeth with advanced pathological root resorption or other conditions contraindicating crown restoration. * Children with significant parafunctional habits, such as severe bruxism, that may affect bite-force measurements.

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Bite force Masseter muscle Primary molars Zirconia crowns

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. 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

  • faculty of dentistry, Tanta university

    Tanta, Egypt

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