[Metal-on-metal hybrid hip resurfacing. Development and current state].

Area of Science:

• Orthopedic surgery
• Biomaterials science
• Medical device engineering

Context:

• Hip resurfacing arthroplasty is increasingly utilized, especially for young, active patients.
• Metal-on-metal (MoM) hip resurfacing offers a bone-preserving, anatomical alternative to traditional hip replacement.
• The Conserve Plus hybrid MoM prosthesis represents a newer generation of hip resurfacing designs.

Purpose:

• To evaluate the clinical outcomes and survival rates of 1,000 Conserve Plus hybrid MoM hip resurfacing prostheses.
• To compare the advancements of modern MoM designs with earlier polyethylene-bearing implants.
• To assess the long-term durability and functional results of MoM hip resurfacing in a large patient cohort.

Summary:

• A consecutive series of 1,140 patients (1,000 Conserve Plus implants) with a mean follow-up of 5.6 years was analyzed.
• Kaplan-Meier survival estimates showed 95.2% prosthesis survival at 5 years (any conversion to total hip replacement as endpoint).
• The mean postoperative Harris hip score was 93.3, indicating excellent functional recovery.

Impact:

• The study demonstrates favorable survival rates and functional outcomes for the Conserve Plus MoM hip resurfacing system.
• Results suggest that modern MoM hip resurfacing provides significant improvements over older designs, offering a durable solution for hip arthritis.
• Further research is recommended to address areas needing continued investigation in MoM hip resurfacing technology.