The modern artificial joint owes much to the 1962 work of Sir John Charnley at Wrightington Hospital. His work in the field of tribology resulted in a design that almost completely replaced the other designs by the 1970s. Charnley's design consisted of three parts:

MM

A stainless steel one-piece femoral stem and head.

Apolyethylene (originally Teflon), concave component.

Both of which were fixed to the bone using Acrylic bone cement.

Source: Wikipedia

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