Hip Implant Components

The different components that come together to make a total hip replacement implant can be considered in three different parts:

(1) The Acetabular Cup

(2) The Femoral Head

(3) The Femoral Stem

Within these three parts, there may be several sub-components that make up that entire part. For example on the schematic image on the right, the femoral stem may be composed of two different components: the stem body and the stem neck. 

The components used can also differ in their material; the most commonly used hip implant materials are Cobalt-Chromium, Titanium, Stainless Steel, Polyethylene and Ceramic.

Material Combinations

The cup-head bearing material combinations used in contemporary total hip replacements are: Metal-on-Metal (MOM), Metal-on-Polyethylene (MOP), Ceramic-on-Polyethylene (COP) and Ceramic-on-Ceramic (COC). The images below show examples of these material combinations.

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