NCT07337642

Comparing Collared and Collarless Femoral Stems in Primary Total Hip Arthroplasty

Comparing Collared and Collarless Femoral Stems in Total Hip Arthroplasty

• Status: Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 100 (estimated)
• Sponsor: Medstar Health Research Institute · Academic / Other
• Sex: All
• Age: 18 Years – 99 Years
• Healthy volunteers: Not accepted

Summary

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.

Conditions

• Primary Total Hip Arthroplasty

Interventions

Type	Name	Description
OTHER	Collarless Femoral Stem	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.
OTHER	Collared Femoral Stem	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.

Timeline

• Start date: 2025-12-03
• Primary completion: 2026-12-31
• Completion: 2027-12-31
• First posted: 2026-01-13
• Last updated: 2026-01-13

Locations

1 site across 1 country: United States

Regulatory

• FDA-regulated device study