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Dental implants still going strong after 25 years? scientists revisit patients from the 1990s

NCT ID NCT06647381

Knowledge-focused Sponsor: University of Bern 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 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Aug 04, 2026 · Updated 2 times

Summary

This study follows up with patients who got dental implants along with a sinus lift procedure between 1997 and 2001. Researchers will check bone loss around the implants, take X-rays and photos, and ask patients about their satisfaction. The goal is to see how well these implants hold up over 25 years.

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 successful, this study could provide long-term data on how well dental implants with sinus lifts hold up over 25 years, helping guide future dental treatments.
What could go wrong
This is an observational follow-up with only 50 participants from a single center, so results may not apply to everyone. The long gap may also make it hard to find enough original patients.

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 50 people

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

Started

Jun 2026

Expected to finish

Jul 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 population of interest will be recruited out of a cohort of patients who were initially treated at the Department of Oral Surgery and Stomatology between 1997 and 2001.

Ages

18 to 100 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: * Patients who were initially treated at the Department of Oral Surgery and Stomatology between 1997 and 2001 * Implant placement in the presence of a sinus floor augmentation procedure received during this period * Patients involved in a previous cohort study Exclusion criteria will be patients: * Not able to come to the re-examination * Concomitant diseases that compromise the health of this subject during the comprehensive examination (i.e., active severe infectious diseases, liver or kidney dysfunction/failure, currently under treatment) * Pregnant women, or unwilling to sign the consent form.

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As listed by the trial registrant

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

Dental implants

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

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • School of Dental Medicine

    Bern, 3012, Switzerland

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