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Dental material showdown: which overlay lasts longer against natural teeth?

NCT ID NCT07689032

Disease control 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 07, 2026 · Last updated Jul 08, 2026 · Updated 1 time

Summary

This trial compares how two types of dental overlays—a CAD/CAM hybrid ceramic and a nano-hybrid composite—wear down over 24 months in root-treated molars. It also measures wear on the opposing natural teeth. Participants are adults aged 22–45 with good oral health and normal bite. The goal is to see which material holds up better and causes less damage to natural teeth.

What this could mean

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

Active substance
CAD/CAM hybrid ceramic overlay (SHOFU Hard blocks) and nano-hybrid composite overlay (BRILLIANT Crios)
What this could lead to
If one material wears less, dentists may choose it for longer-lasting tooth restorations after root canal treatment.
What could go wrong
This is a small, early-stage trial with only 24 participants, so results may not apply to everyone. Wear is measured digitally, but real-world performance could differ.

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 24 people

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

Expected to start

Jul 2026

An estimate. Start dates often move.

Expected to finish

Jul 2028

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

22 to 45 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: * Age between 22 and 45 years. * Low to moderate caries risk. * Normal occlusion. * Absence of signs or symptoms of temporomandibular joint (TMJ) disorders. * Satisfactory oral hygiene. * Medically fit to receive routine restorative dental treatment. * Permanent molars. * Asymptomatic endodontically treated teeth. * Homogeneous root canal fillings extending 1-2 mm from the radiographic apex. * Compound cavities. * Favorable occlusion. * Presence of both an adjacent tooth and a sound opposing tooth in occlusion Exclusion Criteria: * \* Presence of bruxism. * Poor patient cooperation. * Inability or unwillingness to attend follow-up appointments. * Anticipated travel during the study period. * Poor oral hygiene. * Chronic or advanced periodontitis. * Known allergies to any of the materials used in the study. * Patients who are pregnant or breastfeeding. * Teeth with \<1" mm" of residual wall thickness. * Deep subgingival cavity margins. * Severe periodontal problems. * Radiographic signs of apical pathology.

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Conditions

The condition(s) this trial relates to.

Tooth Attrition

As listed by the trial registrant

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

Wear, occlusal

How to take part

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  1. The official record

    The full official record for this study. This one lists no contact details, but it is the first place any would appear.

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