3D printing process with 3D printing resins made by DETAX A case study by Ralf Schieweg and Hans Peter Seidel of Dentaltechnik Knebelsberger GmbH e have recently integrated the Asiga 3D printer PRO75 UV together with 3D printing resins made by DETAX into our everyday laboratory routine. The issue upfront was: "Is this progress that provides relief, or is it more of a burden?" Since the first 3D printers of several renowned manufacturers appeared at the IDS just 2 years ago, we were faced with the question when to enter into additive manufacturing technology or whether the time is not ready yet. A re the material properties satisfactory in daily routine? D o the printed cast templates warp? Is the splint material stable, yet elastic enough and still easy to polish? A re the trays torsion-resistant, do the tray handles hold? Questions over questions for a dental technician when it comes to balancing investment versus success. Fig. 1 Filling the resin into the material bath But now let us go to the individual work areas and the corresponding materials: Splints, templates Splints were our first project. Following a brief introduction by the product management and application technician of Detax and the 3DXS company (Asiga Sales Germany), we started with the first splints. These are positioned vertically and printed after approx. 3 hours. Due to the size of the building platform and the material bath (Fig. 1) of the printer, this layout allows printing approx. 12 splints in a single process. The "building job" is

3D MEDICAL PRINT cleaned after draining the non-polymerized resin. The residues of the 3D resin adhering to the surface are removed in an ultrasonic isopropanol bath for 2 x 3 minutes. Final polymerization is performed with the Otoflash G171 curing unit by NK Optik (Fig. 2) under protective gas (nitrogen). 2 x 2000 flashes take only approx. 6 minutes to complete postcuring. Quick removal of the Fig. 2 Otoflash G171 – post-curing supports, and 2000 flashes the first splints were finished. A convincing result with little effort. The biocompatible Freeprint® Ortho UV (MedProd 2a) material by Detax...

Fig. 5 model casting on plaster model Models Model production would have been of interest to us. Unfortunately we had no clinicians working with intraoral scanners with an STL output format. Thus we were regrettably unable to test the corresponding freeprint® model UV material (Fig. 6). However, we are convinced that practices will be providing us with such data in the near future. Then in-house fabrication of the model in the laboratory will be able to utilize fast fabrication on the market. Polymerization unit Otoflash, post-curing with 2 x 2000 xenon flashes under nitrogen for 6 minutes. Produced...

STAY FREE – PRINT FREE MEDICAL DEVICE CLASS IIA DETAX.DE MEDIGUIDE FREEPRINT® High-end materials for OPEN 3D PRINTERS FREEPRINT® 3D Application clip Freeprint® ortho Freeprint® model Freeprint® cast Orthodontic basic parts, Splints & Templates Dental master and work models Casting objects for precision casting clear-transparent autoclavable, for wet disinfection Medical device Class IIa Max. surface hardness Excellent building precision Grey, ivory, sand Residue free burning Low viscosity Precise reproduction Freeprint® temp Freeprint® tray Temporary crowns & bridges Dental models for thermoforming...