what usage do you use 3D printing? 2012: • Functional models (144 times), • Artistic items (140 times), • Spare parts to devices (133 times), • For research/educational purposes (128 times) and • Direct part production (113 times) 2013: • Artistic items (165 times), • Functional models (136 times), • Spare parts to devices (131 times), • Direct part production (108 times) and • For research/educational purposes (100 times)