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Publications in Scientific Journals:

M. Hartmann, M. Pfaffinger, J. Stampfl:
"The role of solvents in Lithography-based Ceramic Manufacturing of lithium disilicate";
Materials, 14 (2021), 4; 1045 - 1063.



English abstract:
Digital dentistry is increasingly replacing conventional methods of manually producing dental restaurations. With regards to computer aided manufacturing (CAM), milling is state of the art. Additive Manufacturing (AM), as a complementary approach, has also found its way into dental practices and laboratories. Lithography-based Ceramic Manufacturing (LCM) is gaining increasing attention, because it enables the production of full ceramic restaurations by AM. One of the two predominantly used ceramic materials for these applications is lithium disilicate, Li2Si2O5.
This glass ceramic exhibits a substantial fracture toughness, although possessing much lower bending strength, than the other predominantly used ceramic material, zirconia. Additionally, it shows a much more natural optical appearance, due to its inherent translucency and therefore, is considered for anterior tooth restaurations.
In this work, at first the theoretical considerations regarding the optimal formulation of a photoreactive lithium disilicate suspension for LCM are outlined. Then, these considerations are put into practice by using a variety of solvents to adjust the main properties of the suspension. It is shown, that this solvent approach is a useful tool, to effectively optimize a suspension with regards to refractive index, rheology and debinding behavior. Additionally, by examining the effect of the absorber, the exposure time could be reduced by a factor of ten.

Keywords:
Additive Manufacturing/Ceramics/Dental


"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.3390/ma14041045


Created from the Publication Database of the Vienna University of Technology.