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Which filling technique lasts longest? new study compares four methods

NCT ID NCT07415317

Knowledge-focused 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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 24, 2026 · Last updated Jun 27, 2026 · Updated 2 times

Summary

This study looked at four different techniques for placing tooth-colored composite fillings in back teeth with cavities. Fifty patients received 200 fillings and were followed for 2 years to see how well the fillings held up, especially around the edges. The goal is to find the best method for long-lasting dental restorations.

What this could mean

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

Active substance
nanohybrid composite resin
What this could lead to
If successful, this study could help dentists choose the best filling technique for longer-lasting tooth repairs.
What could go wrong
This is a small, short-term study (50 people, 2 years) comparing techniques, not testing a new drug or cure. Results may not apply to all patients or last beyond the study period.

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

50 people

The number who actually took part.

Started

Jan 2024

Finished

Jan 2026

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

20 to 35 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: * Good general and oral health * Vital posterior teeth with primary occlusal caries * Class I cavities with depth ranging from 3 to 4 mm Exclusion Criteria: * Non-vital or restored teeth * Parafunctional habits (e.g., bruxism)

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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.

Composite resins Posterior teeth

Contacts and locations

Locations

  • Faculty of Dentistry

    Tanta, Egypt

  • Restorative Department, Faculty of Dentistry, Tanta University

    Tanta, Tanta, 31527, Egypt

  • Restorative Department, Faculty of Dentistry, Tanta University

    Tanta, Tanta, Egypt

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