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New hip implant shows promise in 10-Year study

NCT ID NCT02648152

Disease control Sponsor: Smith & Nephew, Inc. 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 followed 218 people who received a cementless POLARSTEM hip implant to treat osteoarthritis. Researchers tracked how well the implant worked and how long it lasted over up to 10 years. The goal was to see if this implant is a safe and effective option for hip replacement.

What this could mean

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

Active substance
Cementless POLARSTEM hip implant
What this could lead to
If successful, this could confirm that the POLARSTEM implant is a reliable, long-lasting option for hip replacement in people with osteoarthritis.
What could go wrong
This is an observational study, not a controlled trial, so results may not apply to all patients. Some implants may fail or require revision 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

218 people

The number who actually took part.

Started

Mar 2009

Finished

Nov 2020

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

Patients enrolled in this multicenter clinical observation will have at least one of the indications listed below and meet all of the inclusion criteria. Patients meeting any of the exclusion criteria are not eligible for this study. Indications * Primary or secondary coxarthrosis * Rheumatoid arthritis * Developmental dysplasia of the hip (Crowe type I and II) * Fracture or avascular necrosis of the femoral head

Ages

18 to 75 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: * Patient has no general medical contraindication to surgery * Informed consent to participate in the MCO signed by the patient * Routine radiographic assessment is possible * Patient is likely to comply with study follow-up requirements * Primary total hip replacement (THR) to the affected side, unilateral or bilateral Exclusion Criteria: * Previously failed endoprosthesis and /or THR components in relevant hip * History of infection in the affected joint; systemic infections * Grossly insufficient femoral or acetabular bone stock in the involved hip * Charcot joint disease or other severe neurosensory deficit * Severe spinal disorders * Age of patient at date of surgery \> 75 years * High comorbidity * Cemented acetabular cup

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Conditions

The condition(s) this trial relates to.

osteoarthritis

As listed by the trial registrant

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

Osteoarthritis

Contacts and locations

Locations

  • Kantonsspital Aarau, Orthopedics

    Aarau, 5001, Switzerland

  • St. Elisabeth Hospital, Orthopedics and Rheumatology

    Bochum, 44787, Germany

  • University Marburg, Orthopedics and Rheumatology

    Marburg, Germany

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