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Knee implant showdown: which design helps patients forget their new joint?

NCT ID NCT03548792

Disease control Sponsor: Helse-Bergen HF 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 26, 2026

Summary

This study compares two types of knee implants (NexGen CR and Persona CR) in 160 people with knee osteoarthritis. Researchers will measure how well the implants stay in place, how satisfied patients are, and how active they become after surgery. The goal is to find out which implant design leads to better long-term function and quality of life.

What this could mean

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

Active substance
knee implant (NexGen CR or Persona CR)
What this could lead to
If successful, this could help doctors choose the better knee implant design, leading to improved mobility and satisfaction for osteoarthritis patients.
What could go wrong
This is a relatively small, early-stage comparison study, not a large-scale trial. Results may not apply to all patients, and individual outcomes can vary.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

185 people

The number who actually took part.

Started

May 2017

Expected to finish

Jul 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.

Ages

Up to 80 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 under the age of 80 * Both gender * Primary osteoarthritis * BMI ≤ 35 Exclusion Criteria: * Patient over the age of 80 * Other diagnoses than primary osteoarthritis * BMI \>35 * ASA 4 patients (American Society of Anesthesiologists)

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Conditions

The condition(s) this trial relates to.

osteoarthritis susceptibility 6 osteoarthritis, knee

As listed by the trial registrant

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

Osteoarthritis, knee

Contacts and locations

Locations

  • Helse Bergen, Kysthospitalet i Hagavik

    Hagavik, 5217, Norway

More trials for these conditions

Other studies related to the condition(s) this trial covers.