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Open AccessEditor’s ChoiceArticle

The Role of Solvents in Lithography-Based Ceramic Manufacturing of Lithium Disilicate

Institute of Materials Science and Technology, Faculty of Mechanical and Industrial Engineering, Technische Universität Wien, Getreidemarkt 9, 1060 Vienna, Austria
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Academic Editor: Ji-Man Park
Materials 2021, 14(4), 1045; https://doi.org/10.3390/ma14041045
Received: 19 January 2021 / Revised: 15 February 2021 / Accepted: 19 February 2021 / Published: 23 February 2021
(This article belongs to the Special Issue 3D-Printed Dental Materials)
Digital dentistry is increasingly replacing conventional methods of manually producing dental restorations. 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. Vat photo-polymerization is gaining increasing attention, because it enables the production of full ceramic restorations with high precision. One of the two predominantly used ceramic materials for these applications is lithium disilicate, Li2Si2O5. This glass ceramic exhibits a substantial fracture toughness, although possesses 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 restorations. In this work, an optimized formulation for photo-reactive lithium disilicate suspensions, to be processed by vat photo-polymerization, is presented. Following the fundamental theoretical considerations regarding this processing technique, a variety of solvents was used 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. View Full-Text
Keywords: refractive index; debinding; glass ceramics; digital dentistry; additive manufacturing; vat photo-polymerization refractive index; debinding; glass ceramics; digital dentistry; additive manufacturing; vat photo-polymerization
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MDPI and ACS Style

Hartmann, M.; Pfaffinger, M.; Stampfl, J. The Role of Solvents in Lithography-Based Ceramic Manufacturing of Lithium Disilicate. Materials 2021, 14, 1045. https://doi.org/10.3390/ma14041045

AMA Style

Hartmann M, Pfaffinger M, Stampfl J. The Role of Solvents in Lithography-Based Ceramic Manufacturing of Lithium Disilicate. Materials. 2021; 14(4):1045. https://doi.org/10.3390/ma14041045

Chicago/Turabian Style

Hartmann, Malte; Pfaffinger, Markus; Stampfl, Jürgen. 2021. "The Role of Solvents in Lithography-Based Ceramic Manufacturing of Lithium Disilicate" Materials 14, no. 4: 1045. https://doi.org/10.3390/ma14041045

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