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Hip implants under the microscope: 8-Year Follow-Up study launched

NCT ID NCT05199870

Disease control Sponsor: Zimmer Biomet 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 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026

Summary

This study is checking the long-term safety and performance of two hip implant devices (RingLoc Bipolar Acetabular Cup and Endo II Femoral Head) used in hip replacement surgery. Researchers will follow 116 patients who had their surgery at least eight years ago, tracking complications, revisions, and patient-reported outcomes like pain and mobility. The goal is to confirm these implants continue to work well over time.

What this could mean

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

Active substance
RingLoc Bipolar Acetabular Cup and Endo II Femoral Head (hip implant devices)
What this could lead to
If successful, this study will confirm that these hip implants are safe and work well over the long term, providing reassurance to patients and surgeons.
What could go wrong
This is an observational study, not a controlled trial, so it cannot prove cause and effect. Results may not apply to all patients, and some implants may still fail over time.

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 116 people

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

Started

Mar 2026

Expected to finish

Mar 2027

An estimate. End dates often move.

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

A consecutive series of patients implanted with the RingLoc Bipolar acetabular cup or the Endo II Femoral Head.

Ages

18 years and older

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: * Patient must be 18 years of age or older and skeletally mature * Patient must have undergone hip hemiarthroplasty surgery with the RingLoc Bipolar Acetabular Cup or Endo II Femoral Head for a cleared indication, greater than or equal to eight years previous to the date of study consent. Cleared indications for the RingLoc Bipolar and Endo II Heads include the following: * Noninflammatory degenerative joint disease including osteoarthritis and avascular necrosis * Rheumatoid arthritis * Correction of functional deformity * Treatment of non-union, femoral neck fracture, and trochanteric fractures of the proximal femur with head involvement, unmanageable using other techniques. Exclusion Criteria: * Any medical diagnosis present at the time of surgery that, at the Investigator's discretion, could compromise the implant's survivability * Off-label use or not according to the approved instructions for use (IFU) of study devices * Revision procedures where other treatment or devices have failed * Uncooperative patient or patient with neurologic disorders who is incapable of following directions * Patient has a psychiatric illness or

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Conditions

The condition(s) this trial relates to.

avascular necrosis femoral neck fracture hip fracture Hip Injuries osteoarthritis osteoarthritis, hip rheumatoid arthritis

As listed by the trial registrant

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

Hip arthritis Hip disease Hip fractures Hip injuries Hip pain chronic

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

  • Inova Fairfax Hospital

    Falls Church, Virginia, 22042, United States

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