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Which knee implant holds up better? study pits fixed vs. mobile designs

NCT ID NCT07677722

Disease control Sponsor: Jan Yperman Hospital Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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 Results may not be published yet.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
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This status has not been confirmed recently, so it may be out of date.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 Jul 01, 2026 · Last updated Jul 02, 2026 · Updated 1 time

Summary

This study compares two types of partial knee replacements for people with arthritis on the inner side of the knee. One implant has a fixed bearing (the plastic piece stays still), while the other has a mobile bearing (the plastic piece can move slightly). Researchers will track pain, function, surgery time, and complications in 200 adults aged 50 to 80 to see if one design leads to better outcomes.

What this could mean

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

Active substance
unicompartmental knee prosthesis (fixed bearing vs mobile bearing)
What this could lead to
If one design proves clearly better, it could guide surgeons toward the implant that offers better pain relief, function, and fewer complications for people with medial knee arthritis.
What could go wrong
This is a single-center study with 200 participants, so results may not apply to all patients. Differences between the two designs might be small, and long-term outcomes are not yet known.

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 200 people

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

Started

Dec 2025

Expected to finish

Dec 2029

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

Patients eligible for a unicompartmental medial knee prosthesis based on the eligibility criteria.

Ages

50 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: * Age between 50 and 80 years * Indication for medial UKP * Intact anterior cruciate ligament * Good bone quality based on imaging * ASA score ≤ 3 Exclusion Criteria: * Inflammatory joint diseases * Collateral ligament instability * Simultaneous bilateral procedure * BMI \> 35 * History of fracture or osteotomy in the knee joint * Neuromuscular diseases * Oncological indications

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Conditions

The condition(s) this trial relates to.

osteoarthritis, knee

As listed by the trial registrant

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

Medial gonarthrosis

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

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    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

  • Orthopedic department

    RECRUITING

    Ieper, Oost-Vlaanderen, 8900, Belgium

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