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Dental crown showdown: which method saves kids' teeth better?

NCT ID NCT06350578

Disease control Sponsor: Primary Health Care Corporation, Qatar 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
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 study compared two techniques for placing stainless steel crowns on children's baby molars with cavities: the Hall technique (no drilling, crown cemented directly) and the conventional method (drilling and shaping the tooth first). Eighty children aged 3-9 participated, and researchers tracked crown and tooth survival over 12 months. The goal was to see which approach leads to fewer failures and better long-term outcomes.

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

80 people

The number who actually took part.

Started

Dec 2023

Finished

Aug 2025

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

3 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: * Participant inclusion criteria: PHCC paediatric dental patients: 1. Whose parents or legal guardians accept and sign the consent form 2. Who assent to participation. 3. Who aged 3-9 years old. 4. Who exhibit generally cooperative behavior. 5. Who exhibit good general health conditions. 6. Who are presenting at least one occluso-proximal lesion in a primary molar. Tooth/ carious lesion inclusion criteria: 1\. From clinical and radiographic examination, caries limited to the occluso-proximal surfaces and extending to enamel or dentine, cavitated or non cavitated. Exclusion Criteria: 1. Uncooperative children who do not understand the procedure or tolerate biting the crown into its position without local anesthesia. 2. Children with special health care needs (SHCN) will be excluded. 3. Children with nickel allergies and sensitivity. Tooth/ caries lesion exclusion criteria: 1. Tooth with signs or symptoms of dental infection or irreversible pulpitis such as: A history of spontaneous unprovoked pain, a sinus tract, soft tissue inflammation not resulting from gingivitis or periodontitis, excessive mobility not associated with trauma or exfoliation, furcation/ apical radiolucency, or radiographic evidence of internal/ external resorption (Camp JH 2011). 2. Crowns severely destructed with caries, which considered non-restorable (Innes, N.P 2009). 3. Teeth with single surface (occlusal) caries.

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Conditions

The condition(s) this trial relates to.

dental caries

As listed by the trial registrant

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

Approximal dental caries (icdas 3-5) in primary molars of children

Contacts and locations

Locations

  • Primary Healthcare Corporation

    Doha, Qatar