Clinical trial Recruiting at 1 site Observational Ages 60 and up

Fixing the hip socket with plates and screws versus adding a hip replacement for older adults with a broken acetabulum

Official title: GATOR: Geriatric Acetabular fracTures: Open Reduction Internal Fixation Versus Replacement - A Large Cohort of Acute Open Reduction Internal Fixation (ORIF) Versus Total Hip Arthroplasty for Geriatric Acetabular Fractures

Run by Unity Health Toronto · NCT03713853 · Data updated 2026-11-12

This study will try two surgical approaches—ORIF alone versus ORIF plus a primary total hip replacement—in people 60 and older with an acute displaced acetabular (hip socket) fracture to see which gives better pain, function, and quality of life.

Quick facts

Study typeObservational
Ages60 Years and up
SexAll
Enrollment104 (estimated)
SponsorUnity Health Toronto
Academic / other
Locations1 site (Toronto, Ontario)
StatusRecruiting
StartedDecember 2026
Main results expectedDecember 2029
Study endsDecember 2030
Registry record updatedJune 12, 2026
Trial IDNCT03713853 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are ambulatory adults aged 60 or older with an isolated, displaced acetabular fracture within three weeks of injury who require surgical treatment, can provide informed consent, and can read English.

Probably not a fit

Patients with open fractures, active local infection, bilateral or pathological (non-osteoporotic) or periprosthetic fractures, dementia, or contraindications to surgery are unlikely to benefit from participation or be eligible.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a multicentre observational cohort of patients aged 60 and older with acute displaced acetabular fractures treated either with open reduction internal fixation (ORIF) alone or with ORIF plus a primary total hip arthroplasty (THA) at surgeon discretion. Enrolled participants are followed to 24 months with standard-of-care clinic visits at 6 weeks, 3, 6, 12, and 24 months. Outcomes include patient-reported measures (Oxford Hip Score, EQ-5D) and objective mobility testing (Timed Up & Go). The study aims to compare functional recovery, quality of life, and need for subsequent hip procedures between the two surgical strategies.

Why it matters

Potential benefit: If successful, the results could help surgeons choose the operation that leads to better pain relief, mobility, and fewer reoperations for older adults with acetabular fractures.

How similar studies have gone: Previous observational series and registry data have reported high rates of later hip replacement after ORIF alone, but direct comparative randomized evidence between ORIF and ORIF+THA in this population is limited.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* 60 years of age or older
* Isolated and Displaced (more or equal to 2mm on any radiographic view) fracture of the acetabulum
* Patient requires surgical treatment, either THA+ORIF or ORIF surgeries
* Fracture is acute (within 3 weeks of injury)
* Patient was ambulatory (with or without walking aids) prior to their acetabular fracture injury
* Patient is able to provide informed consent to participation in the study
* Patient is able to read and understand English

Exclusion Criteria:

* Presence of an active or chronic infection around the fracture (soft tissue or bone)
* Open/compound fracture
* Bilateral acetabular fractures
* Pathological fracture excluding osteoporosis
* Periprosthetic fracture (previous arthroplasty or hardware or ORIF in-situ). Hardware (screws or plates or nails or hemi-arthroplasty) on the femoral side are not excluded.
* Medical or surgical contraindication to surgery
* Dementia

Where it's running

  • Unity Health Toronto - St Michael's Hospital
    Toronto, Ontario, Canada
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.