what the selection of materials and manufacturing processes

what the selection of materials and manufacturing processes that we use for a prosthesis ?

Solution

Raw Material

A prosthetic device should most of all be lightweight; hence, much of it is made from plastic. The socket is usually made from polypropylene. Lightweight metals such as titanium and aluminum have replaced much of the steel in the pylon

Fabrication

There are many ways to manufacture the parts of a prosthetic limb. Plastic pieces—including soft-foam pieces used as liners or padding—are made in the usual plastic forming methods. These include vacuum-forming (see no. 3 above), injecting molding—forcing molten plastic into a mold and letting it cool—and extruding, in which the plastic is pulled through a shaped die. Pylons that are made of titanium or aluminum can be die-cast; in this process, liquid metal is forced into a steel die of the proper shape.