Comparing Collared and Collarless Femoral Stems in Primary Total Hip Arthroplasty

Conditions

• Primary Total Hip Arthroplasty

Eligibility Criteria

Sex

ALL

Age

18 Years - 99 Years

Healthy Volunteers

Not accepted

Interventions

• Collarless Femoral Stem — OTHER
  Patients will be randomized to one of two groups receiving either a collarless or collared femoral stem. Patients randomized to this group will receive a collarless femoral stem implant at time of surgery.
• Collared Femoral Stem — OTHER
  Patients will be randomized to one of two groups receiving either a collarless or collared femoral stem. Patients randomized to this group will receive a collared femoral stem at the time of surgery.

Study Details

This is a prospective randomized control trial comparing two collared and collarless femoral implants used in primary total hip arthroplasty. The specific aims of this trial are to: SA1: Prospectively assess clinical outcomes in patients undergoing primary total hip arthroplasty with a collared versus collarless femoral stem of the same design. SA2: Evaluate serial radiographs to quantify differences in subsidence between collared and collarless implant groups. SA3: Report and compare incidence rates of intraoperative and postoperative periprosthetic fractures and aseptic loosening following primary total hip arthroplasty with use of either a collared or collarless stem. Hypothesis: The addition of a collar to the same designed triple-taper primary hip stem will lead to a reduction in subsidence and incidence of perioperative and periprosthetic femur fractures.

Key Dates

Start date

Dec 3, 2025

Status verified

Jan 2026

Primary completion

Dec 31, 2026

Completion

Dec 31, 2027

Study Design

Enrollment

100 participants (estimated)

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Arms

• Active Comparator: Collard stem
• Active Comparator: Collarless stem

Primary Outcome Measure

Measurement of femoral stem subsidence at 6 weeks, 6 months, and 1-year post-operation [ Time Frame: 6 weeks, 6 months, and 1 year post operation ]

Central Contacts

• Miles Hollimon, B.S.
  (202) 444-8766
  [email protected]

Locations (1)

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