Patient Resources
Prosthetic materials for lasting results.
High-quality prosthetic materials designed to support function, comfort, and long-term surgical success.
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Modern joint replacements use carefully engineered materials chosen for their durability, biocompatibility, and performance. This guide covers the most common materials used in hip and knee prostheses. Your consultant will explain which materials are recommended for your specific procedure.
Step by Step
What you need to know.
Metal Alloys
Metal alloys provide the strength, durability, and biocompatibility required for long-term performance in joint replacement components.
Cobalt-Chromium Alloys
Known for their high strength and excellent wear resistance, cobalt-chromium alloys are predominantly used in the femoral components of hip replacements and both femoral and tibial components in knee replacements. They are particularly suited to active patients. There is a minimal risk of metal ion release, which your consultant will discuss with you.
Titanium and Titanium Alloys
Lightweight with excellent corrosion resistance, titanium alloys are used in hip stems and tibial components. Their reduced weight is a significant benefit, though they come at a higher cost and have slightly lower wear resistance compared to cobalt-chromium alternatives.
Ultra-High Molecular Weight Polyethylene
This advanced medical-grade plastic reduces friction between metal components and is used in acetabular and tibial liners. Modern cross-linked versions offer significantly improved wear characteristics compared to earlier generations, contributing to longer-lasting joint replacements.
Ceramics — Alumina and Zirconia
Ceramic materials are extremely hard, smooth, and wear-resistant. They are primarily used in hip replacements and virtually eliminate the risk of metal ion release. The trade-off is a very small risk of fracture under severe impact, which your consultant will assess based on your activity level.
Carbon Fibre-Reinforced Polyethylene
This composite material combines the wear resistance of carbon fibre with the durability of polyethylene. It is used in both hip and knee replacement components to enhance longevity, particularly in younger or more active patients.
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