Collared versus collarless femoral stems for primary total hip replacement

Is this trial a fit for you?

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 prospective, randomized comparison of two femoral stem options—one with a collar and one without—that share the same triple-taper design, used in primary uncemented total hip arthroplasty. Participants are adults with non-inflammatory degenerative hip disease who are randomized to receive either the collared or collarless stem, with serial clinical assessments and radiographs scheduled after surgery. The study will quantify subsidence on serial radiographs and record intraoperative and postoperative periprosthetic fractures and aseptic loosening rates. Results will compare clinical outcomes and radiographic behavior between the two implant groups at prespecified follow-up intervals.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Adults (≥ 18 years old) scheduled for primary, uncemented THA using a cementless femoral stem
* Diagnosis of primary osteoarthritis or other non-inflammatory degenerative joint disease.
* Ability and willingness to comply with study procedures and follow-up schedule.
* Ability to provide written informed consent

Exclusion Criteria:

* Patients not indicated for a cementless THA
* Prior surgery on the ipsilateral hip (e.g., prior THA, internal fixation, osteotomy)
* Use of cemented or hybrid femoral components.
* Revision THA or conversion THA
* Active or prior infection of the hip joint.
* Severe osteoporosis (T-score ≤ -2.5) or known metabolic bone disease.
* Inability to complete follow-up or anticipated relocation out of the area.

Where it's running

• MedStar Georgetown University Hospital
  Washington D.C., District of Columbia, United States Recruiting

Study contacts

• Study coordinator: Miles Hollimon, B.S.
• Email: miles.hollimon@medstar.net
• Phone: (202) 444-8766

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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.