Materials Used in Knee Replacements

The materials used in knee replacements combine strength, flexibility and comfort. People undergoing knee procedures need to be able to function in their daily lives in comfort and little or no pain. Most components of knee replacements combine two or more of the basic materials used in their construction.

Metal

• Metal is one of the materials used in knee replacements as part of the femoral component, according to the American Academy of Orthopaedic Surgeons. This device curves at the end of the thighbone and helps the kneecap bend and straighten.

Plastic

• Plastic is the material used to construct the tibial component, which keeps the thighbone from sliding on the shinbone. The plastic parts sit on a metal tray with polyurethane cushioning.

Polyurethane

• The patellar component mimics the shape of the kneecap and is constructed out of polyurethane materials.

Titanium

• Some knee replacement materials used to make components include titanium because of its strength and durability.

Cobalt

• The Hip and Knee Institute says that cobalt is one of the durable materials used in knee replacements because it is strong and able to withstand the pressure of walking.