Mouth guards and mouth pieces are widely used in many fields of applica-tions. Mouth guards can prevent or reduce injury to the teeth and gums in contact sports like American football or boxing. Furthermore mouth pieces are used in medical breathing apparatus or diving equipment. They are even utilized in dental procedures like tooth bleaching or as dental night guards. Mouth guards and mouth pieces are either produced in mass production with low costs resulting in a poor wearing comfort or they are manufactured by an expensive customized fabrication process. There is a great demand for custom-fit mouth guards and dental appliances without the need to have it formed by a dentist. Mouth guards and mouthpieces are usually made from soft or hard materials, but it would be desirable to fabricate custom-fit mouth guards which are hard enough to offer protection and soft enough to provide a high wearing comfort.<br><br> <strong>Technology</strong><br> This self-customizable mouth guard is made of a shape memory polymer (e.g. polyesterurethane). The shape memory polymer turns into the custom form, if it is heated and custom-fitted (boil-and-bite principle). But the shape memory polymer can return to its predefined form when heating them above a material-dependent transition temperature and the mouth guard can be custom fitted several times. Due to its customized form the mouth guard enables a high wearing comfort. <br><br>
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More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
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Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
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The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
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Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
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