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Kids' bite force under the microscope: new study on crowns

NCT ID NCT07276841

Knowledge-focused Sponsor: Cairo 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This observational study looks at how children's bite force and tooth contact change after getting zirconia crowns on treated baby molars. Eleven children aged 6 to 9 will have their bite measured before and after crown placement using a digital system. The goal is to understand how the crowns fit into the child's bite pattern, not to test a new treatment.

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 11 people

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

Expected to start

Jan 2026

An estimate. Start dates often move.

Expected to finish

Mar 2026

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

6 to 9 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 6 to 9 years. * Both boys and girls can participate. * A pulp-treated primary molar (pulpotomy) that is healthy and shows no pain, no swelling, no mobility, and no radiographic problems (such as internal resorption or infection). * The lower first permanent molar must be erupted. * The child is cooperative during dental treatment (positive behavior on the Frankl scale). * The child has no missing teeth. * The child has a normal bite (normal overjet and overbite). * The child is generally healthy with no systemic diseases, to ensure they can attend follow-ups. Exclusion Criteria: * Children with medical conditions or who are uncooperative during dental care. * Children with parafunctional habits, such as teeth grinding (bruxism), thumb-sucking, or other habits that may affect bite-force measurements. * Teeth that are close to falling out, have severe root resorption, or need extraction. * Teeth with deep cavities below the gum line that prevent proper crown placement. * Teeth that are mobile (Miller's Grade 2 or higher). * Teeth that have had previous pulp therapy other than the included pulpotomy. * Children who are unable to attend follow-up visits or whose parents do not agree to participate.

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Conditions

The condition(s) this trial relates to.

Bites and Stings

As listed by the trial registrant

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

Dental occlusion Primary teeth Pulp-treated 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, Cairo University

    Cairo, Giza Governorate, 12613, Egypt

More trials for these conditions

Other studies related to the condition(s) this trial covers.