Probably you have seen somewhere a photo or a video of a model for domestically and amateur use, where the operating systems are more simple than other elaborated models. In this case the printer looks like a block, similar to the domestic laser printers, but they have transparent panels on the side to control the printing process. Inside the structure there's an insured printer head in movable brackets, that makes the printer head shifts back and forth, in the top and bottom.

The printer head is connected to a plastic cartridge, whose spillage is monitored by the printer head itself depending on the characteristics of the coat that is printing.

The material can be liquid or in powder, and it's not always plastic: some printers utilize metals and other polymers who can simulate the characteristic of the body's textiles. In the last few years there have been remarkable progress for the technologies of the three-dimensional printing, both for the printers and the materials that can be used.

The 3D printers used for industries are used most of all for printing prototypes of future products at very low cost than traditional methods for realize those. In this way is possible to test and experiment the characteristics of the pre-production of models making them similar to the final product.

In the healthcare setting, some years now people have been studying solutions to create prosthesis and textiles that can be implanted in the patients. The idea is using the 3D printing to create personalized models of the things that has to been implanted, so that they can adapt in the better way to the people who had to use them. Some months ago, for example, it has been implanted in the head of the patient a plaque printed in 3D, created just for the person that would have received that and he didn't show any problems of reject and infections.