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Hip stem movement measured in new study

NCT ID NCT04879732

Knowledge-focused Sponsor: Canadian Radiostereometric Analysis Network 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study measured how much the ACTIS hip stem moves (subsides) over two years after hip replacement surgery in 64 people with hip osteoarthritis. Researchers used a special X-ray technique called RSA to compare the implant's movement to published data for similar hip stems. The goal was to see if the ACTIS stem stays in place as well as other designs.

What this could mean

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

Active substance
ACTIS hip stem (a medical device used in hip replacement surgery)
What this could lead to
If successful, this study could confirm that the ACTIS hip stem stays in place well, which may lead to better long-term outcomes for hip replacement patients.
What could go wrong
This is a small, completed study focused on measuring implant movement, not on curing disease. Results may not apply to all patients or guarantee better 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.

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

64 people

The number who actually took part.

Started

Oct 2021

Finished

May 2025

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

21 years and older

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: * Symptomatic osteoarthritis of the hip indicating primary total hip arthroplasty * Aged 21 years or older * Patients willing and able to comply with follow-up requirements and self-evaluations * Ability to give informed consent * Body mass index ≤45 kg/m2 Exclusion Criteria * Active or prior infection * Medical condition precluding major surgery * Medical condition with less than 2 years life expectancy * Overhanging pannus (for anterior approach cohort only) * Prior surgery of the hip involving implantation of hardware (i.e., hemiarthroplasty, internal fixation, pelvic reconstruction near the acetabulum requiring removal) * Skin condition on the area of incision * Multi-level lumbar spine fusion * Ankylosing spondylolithesis * Shortening osteotomy through the femur

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Conditions

The condition(s) this trial relates to.

osteoarthritis, hip

As listed by the trial registrant

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

Hip osteoarthritis

Contacts and locations

Locations

  • London Health Sciences Centre

    London, Ontario, N6A 5W9, Canada

  • Nova Scotia Health - Orthopedic

    Halifax, Nova Scotia, B3H 2E1, Canada

  • Orthopaedic Innovation Centre

    Winnipeg, Manitoba, R2K 2M9, Canada

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