3D printing has become a viable alternative because parts of complex geometry can be generated within everyone’s reach.

This technology makes it possible to reproduce objects in three dimensions from a prototype designed by computer. The two most common types of printing are:

• Layer overlay: Objects are created by superimposing successive layers of a certain material (plastics or resins).

• By injection: a thin layer of powder is placed and then the printer adds a glue in the part that is to be solidified. This step is repeated until the model is finished, and then the remaining material (dust) that has not been set by blowing is removed

Parts of a 3D printer: