Improved results using extensively coated THA stems at minimum 5-year followup

Area of Science:

• Orthopedic surgery
• Biomaterials science
• Medical device engineering

Background:

• Total hip arthroplasty (THA) aims to restore function and reduce pain.
• Femoral component design influences bone ingrowth and long-term implant stability.
• First-generation proximally coated stems have shown variable clinical outcomes.

Purpose of the Study:

• To compare the clinical and radiographic outcomes of an extensively coated femoral component (Prodigy) versus a proximally coated first-generation component.
• To evaluate the efficacy of extensive coating in promoting bone ingrowth and reducing complications.

Main Methods:

• Retrospective comparison of 100 hips with extensively coated Prodigy femoral components against a cohort with proximally coated stems.
• Minimum 5-year follow-up including clinical assessment for thigh pain and radiographic evaluation for bone ingrowth and lysis.
• Single-surgeon series ensuring consistent surgical technique.

Main Results:

• No aseptic loosening revisions in the extensively coated group versus an unstated rate in the proximally coated group.
• Significantly lower incidence of thigh pain (3% vs. 15%) in the extensively coated group.
• 100% bone ingrowth in the extensively coated group compared to 94% in the proximally coated group, with fewer radiolucencies and less distal femoral lysis.

Conclusions:

• Extensive femoral component coating demonstrates superior clinical and radiographic performance in THA.
• The Prodigy femoral component design promotes robust bone ingrowth and reduces periprosthetic complications.
• Extensive coating may be a key factor in improving long-term total hip arthroplasty outcomes.