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Scientists compare three knee implant designs to see which moves most naturally

NCT ID NCT05107414

Knowledge-focused Sponsor: The University of Tennessee, Knoxville 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looks at how three types of Journey II knee replacements (BCS, CR, and XR) move inside the body during activities like bending. Researchers will use video and sound recordings to measure joint motion in people who had knee replacement surgery at least six months ago. The goal is to understand which design allows for the most natural movement, which could help guide future implant choices.

What this could mean

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

Active substance
Smith & Nephew Journey II total knee arthroplasty (BCS, CR, or XR model)
What this could lead to
If successful, this study could help surgeons choose which knee replacement design offers the best motion and function for patients.
What could go wrong
This is an observational study with no treatment being tested, so it cannot prove that one knee design is better than another. Results may not apply to all 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

201 people

The number who actually took part.

Started

May 2021

Finished

Dec 2024

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

All participants will be selected by their respective surgeons. Participants will be screened by eligible surgeon staff and will have the required implant for each site.

Ages

18 to 85 years

Sex

Anyone

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: 1. Patients in the age range of 18 years to 85 years (both inclusive) 2. Patients who have a BMI less than 35 3. Patients who do not have previous surgery on the implanted knee that might restrict their movement 4. Patient who are at least 6 months post-operative 5. Patients who do not experience any pain or other post-operative complications 6. Patients who have a stable TKA and can perform a deep knee bend activity 7. Patients who are willing to participate in this study and are willing to sign appropriate HIPAA and informed consent forms 8. Subjects will have a Journey II knee system Exclusion Criteria: 1. Pregnant, potentially pregnant, or lactating females. To satisfy radiation protocol, each female subject will be asked if she is pregnant, or possibly could be pregnant. A pregnant person will not be allowed to participate in the study. 2. Patients who have currently enrolled in a fluoroscopic study within the past year. 3. Patients currently involved in any personal injury litigation, medical/legal or workman's compensation claims. 4. Patients with known drug or alcohol abuse histories or psychological disorders that could affect ability to complete all aspects of the study. 5. Patients with neurological or musculoskeletal disorders that might adversely affect weight-bearing motion ability 6. Subjects who are unable to perform a deep knee bend. 7. Subjects who are unwilling to sign Informed Consent/ HIPAA documents. 8. Subjects without the required type of knee implant.

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As listed by the trial registrant

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

Total knee arthroplasty

Contacts and locations

Locations

  • University of Tennessee

    Knoxville, Tennessee, 37996, United States

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