**8. Conclusions**

In this chapter, we reviewed the modern tendency to fabricate the 3D printing of functionally graded structures from the polymer-covered nanocomposites: inkjet 3D printing of optical nanostructures; 3D-printing of polymer nanocomposites with specific viscosity, osteoconduc‐ tivity and biodegradability; FG nanostructures with different connectivity types, obtained by a hybrid SLS technology; opportunities of the SLS/M formation of magnetic local zones of the specified configuration; and 3D printing of magnet polymer nanocomposites/objects for medical applications.

Numerous problems have been identified and some solutions have been proposed and assessed. Still, a lot of further researches are required to implement a true industrial process, providing the rapid fabrication of high quality net-shaped MEMS/NEMS devices—implants, catalytic filters and membranes, lab-on-chips and drug delivery systems, magnetic hyperther‐ mia systems and 3D crystalline structures for hydrogen storage, and/or optical devices.
