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.
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
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