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Dental crowns under the microscope: what happens after years of wear?

NCT ID NCT07828509

Knowledge-focused Sponsor: Riga Stradins University Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 18, 2026 · Last updated Sep 18, 2026

Summary

Researchers at Riga Stradins University are studying how metal-ceramic dental crowns hold up over time. They will review dental records to find adults with at least one such crown, then invite them for a clinical exam. The team will check the crowns for chipping, wear, fit, color match, and decay, and assess the health of the gums and supporting tissues. Participants also fill out a questionnaire about their oral habits and satisfaction with the crowns.

What this could mean

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

What this could lead to
If the study identifies which crown problems appear most often over time, dentists could use that information to refine crown design, materials, or follow-up schedules.
What could go wrong
This is a small observational study of 79 people at one university, so its findings may not apply to all dental practices or crown types. It cannot prove what causes complications, only describe patterns.

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

About 79 people

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

Started

May 2026

Expected to finish

Dec 2026

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.

Who is studied

The study population consists of adult patients who received metal-ceramic crowns and were identified through a review of dental records according to predefined eligibility criteria. Eligible patients were invited to participate in a clinical examination and questionnaire assessment.

Ages

20 to 80 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: * adult patients with at least one metal-ceramic single crown meeting the predefined study criteria. * ability and willingness to participate in the clinical examination and complete the questionnaire Exclusion Criteria: * teeth serving as abutments for fixed partial prostheses (FPPs) * teeth as abutments for removable partial dentures (RPDs)

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As listed by the trial registrant

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

Gingival health Metal ceramic restorations

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. 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.

    Open the record ↗

  3. A doctor treating you

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Contacts and locations

Locations

  • Rīga Stradiņš University Institute of Stomatology

    Riga, LV 1007, Latvia

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