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10 years after ACL surgery: researchers use MRI to peek inside knees for early arthritis clues

NCT ID NCT04660955

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Updated 2 times

Summary

This study looks at 219 people who had ACL reconstruction surgery about 10 years ago. Researchers will use MRI scans to check the health of the knee cartilage and compare it to the uninjured knee. The goal is to learn more about how osteoarthritis develops after a knee injury.

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 help doctors understand how osteoarthritis develops after ACL injuries, potentially leading to better prevention or early treatment strategies.
What could go wrong
This is an observational study, not a treatment trial. It will not test any new drug or therapy, so it cannot directly improve patient outcomes.

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 219 people

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

Started

Jan 2020

Expected to finish

Jan 2030

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

This patient cohort include patients who had ACL reconstruction 10 years ago and were recruited in the previous MOON onsite study based on the inclusion criteria listed above.

Ages

22 to 45 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: * Enrolled in MOON Onsite Study * 12-33 years old at baseline (22-45 years for this study); * ACL tear during a sport; no previous knee injury; * No graft rupture during follow-up; * No history of surgery on the contralateral knee; * No MRI contraindications Exclusion Criteria: * History of surgery on contralateral knee * Afraid of enclosed spaces

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

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

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

  • Cleveland Clinic

    Cleveland, Ohio, 44125, United States

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