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New dental crowns tested – but trial halted early

NCT ID NCT05070416

Disease control Sponsor: Ivoclar Vivadent AG 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
The trial has finished. Results may not be published yet.
Stopped early This study
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This status has not been confirmed recently, so it may be out of date.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 tested lithium disilicate crowns made with CAD/CAM technology in 8 adults with cavities or damaged teeth. The crowns were placed using different adhesive methods to check for sensitivity and quality. The trial was terminated early, so the findings are limited.

What this could mean

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

Active substance
Lithium disilicate crowns (dental device)
What this could lead to
If successful, this could provide a durable, aesthetic option for restoring teeth damaged by cavities or trauma.
What could go wrong
The trial was terminated early with only 8 participants, so results are very limited. It is unclear if the crowns perform better than existing options.

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

8 people

The number who actually took part.

Started

Oct 2021

Finished

Mar 2023

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

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

Ages

18 years and older

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: * Patients will be at least 18 years of age, of either gender, and of any ethnic background. * Each patient should have at least one carious lesion or defective restoration to be restored on a maxillary or mandibular premolar or molar tooth. * Each lesion or defective restoration should exhibit sufficient size or loss of tooth structure requiring a full crown restoration. * The tooth should have at least one opposing tooth in occlusion and one adjacent tooth with an intact proximal contact. * All teeth will test vital and be asymptomatic at the beginning of treatment. No more than two restorations will be placed per patient. Exclusion Criteria: * Devital or sensitive teeth * Teeth with prior endodontic treatment of any kind * Teeth with a history of direct or indirect pulp capping procedures * Patients with significant untreated dental disease to include periodontitis and/or rampant caries * Women who self-report that they are possibly pregnant, pregnant, or lactating, as elective dental treatment is not indicated at these times * Patients with a self-reported past history of allergies to the materials to be used in the study including composite resin cements or ceramic restorative materials * Patients unable to return for the recall appointments

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Conditions

The condition(s) this trial relates to.

dental caries injury

As listed by the trial registrant

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

Caries Dental trauma

Contacts and locations

Locations

  • University of Michigan School of Dentistry

    Ann Arbor, Michigan, 48109-1078, United States

More trials for these conditions

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