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25-year dental implant study reveals secrets to long-term success

NCT ID NCT06599320

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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 160 patients who had dental implants for at least 25 years to see what factors help them last. Researchers checked bone levels, gum health, and any problems like infections or breakage. The goal is to find out what leads to long-term success and what raises the risk of failure.

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

160 people

The number who actually took part.

Started

Sep 2024

Finished

Dec 2025

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

Out of the pool of patients from the Departments of Oral Surgery and Periodontology and Fixed Prosthodontics at the University of Bern, Switzerland, all patients having received at least one dental implant will be recruited for a comprehensive evaluation 25 years after implant installation and delivery of the reconstruction. The patients had been treated according to a comprehensive treatment strategy prior to the installation of implants and incorporation of reconstructions. All patients were offered maintenance care that was provided either in the School of Dental Medicine, University of Bern, Switzerland, or in the dental practices of the referring dentists at intervals between 3 and 6 months. All the implants installed were solid screws (SS) with a diameter of 3.3, 4.1 or 4.8 mm, a length between 6-14 mm and a sandblasted and acid-etched surface (SLA) (Straumann® Dental Implant System, Institute Straumann AG, Basel, Switzerland).

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

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: All patients rehabilitated with oral dental implants supporting fixed partial dental prostheses and followed up for at least 20-years. Exclusion Criteria: None

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As listed by the trial registrant

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

Dental implant failure

Contacts and locations

Locations

  • University of Bern

    Bern, Switzerland

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