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15-Year checkup: do these dental crowns stand the test of time?

NCT ID NCT06898411

Knowledge-focused 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 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looked at how long single-tooth restorations made with IPS e.max (a type of glass-ceramic) last after being worn for more than 15 years. Researchers examined 56 people who had received these restorations between 2006 and 2010, checking their survival rate and quality. The goal is to understand the long-term durability of these dental materials.

What this could mean

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

Active substance
IPS e.max (lithium disilicate glass-ceramic) dental restoration
What this could lead to
If successful, this study could confirm that IPS e.max restorations remain durable and functional for over 15 years, supporting their continued use in dentistry.
What could go wrong
This is a small, retrospective study with only 56 participants, all from one clinic. Results may not apply to everyone, and the study does not test new treatments.

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.

Participants

56 people

The number who actually took part.

Started

May 2025

Finished

Jan 2026

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.

Who is studied

Adults recieving indirect single tooth restorations (inlay, onlay, veneer or crown) within the internal clinic of Ivoclar Vivadent AG between 2006 and 2010.

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: * Age: \> 18 years * Informed consent signed and understood by the subject * Received indirect single tooth restoration (inlay, onlay, veneer or crown) within the internal clinic of Ivoclar Vivadent AG between 2006 and 2010 * Single tooth restoration was done with IPS e.max CAD or IPS e.max Press * Able to visit the internal clinic of Ivoclar Vivadent AG in Schaan, FL. Exclusion Criteria: * Health status (physical and mental) does not allow participation

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As listed by the trial registrant

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

Longevity Single tooth restoration

Contacts and locations

Locations

  • Ivoclar Vivadent AG

    Schaan, 9494, Liechtenstein

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