Baumgartner Sonja, Gmeiner Robert, Schönherr Julia Anna, Stampfl Jürgen
Institute of Materials Science and Technology, Christian Doppler Laboratory 'Photopolymers in Digital and Restorative Dentistry', TU Wien, Getreidemarkt 9, 1060 Vienna, Austria.
Mater Sci Eng C Mater Biol Appl. 2020 Nov;116:111180. doi: 10.1016/j.msec.2020.111180. Epub 2020 Jun 18.
With additive manufacturing (AM) on the rise in industrial production, different industries are looking for a way to benefit from the advantages over conventional manufacturing methods like milling or casting. The layer by layer approach allows the parallel construction of different complex structures with simultaneous customization of the parts, while waste material is significantly reduced. This is especially interesting for the processing of advanced ceramic materials, where often customized and single parts are required. Regarding ceramics, Lithographic Ceramic Manufacturing (LCM) provides the highest surface quality and achievable precision compared to any other AM technologies, which is necessary to meet the high demands from dental industry regarding accuracy and reproducibility. At TU Wien, we achieved expertise in printing different kinds of ceramics and glasses by using specially developed stereolithography printers based on digital light processing (DLP) followed by a thermal debinding and sintering processes. In dental industry, glass ceramic materials are widely used for customized and aesthetic restorations. This work deals with the processing of lithium disilicate via an AM technology, offering highly dense (>99%), full ceramic parts which meet the requirements for the use as dental restorations. With outstanding mechanical properties of over 400 MPa flexural strength, excellent translucency and accuracy, veneers, crowns and even bridges, especially for the anterior tooth area can be reproducibly printed, debinded and sintered.
随着增材制造（AM）在工业生产中的兴起，不同行业都在寻求从其相较于铣削或铸造等传统制造方法的优势中获益。逐层制造方法允许并行构建不同的复杂结构，同时对零件进行定制，而且废料显著减少。这对于先进陶瓷材料的加工尤其具有吸引力，因为通常需要定制的单个零件。就陶瓷而言，与任何其他增材制造技术相比，光刻陶瓷制造（LCM）提供了最高的表面质量和可达到的精度，这对于满足牙科行业对精度和再现性的高要求是必要的。在维也纳工业大学，我们通过使用基于数字光处理（DLP）的专门开发的立体光刻打印机，随后进行热脱脂和烧结工艺，在打印不同种类的陶瓷和玻璃方面积累了专业知识。在牙科行业，玻璃陶瓷材料广泛用于定制和美观的修复体。这项工作涉及通过增材制造技术加工二硅酸锂，提供高密度（>99%）的全陶瓷零件，这些零件满足用作牙科修复体的要求。凭借超过400MPa的弯曲强度、出色的半透明度和精度等优异机械性能，可以可重复地打印、脱脂和烧结贴面、牙冠甚至牙桥，特别是用于前牙区域。
