Book excerpt: Resin materials are broadly used in dentistry for almost all indications, and they will gain even more importance in the future. Especially, the increasing performance and efficiency of the CAD/CAM technology and 3D-printing open possibilities to use resins not used up to now in dentistry. Besides dentists, dental students or dental technicians, there are many other specialists such as researchers, material scientists, industrial developers or experts of adjoining professional disciplines who are technically engaged in dental resins. The idea of this e-Book series is to present a three-level textbook consisting of "Basic Level", "Advanced Level" and "Expert Level" versions dealing with material science and technology of dental resins. Every level significantly expands the information and knowledge given by the respective preceding version. This book presents the "Advanced Level" version. The "Advanced Level" broadens the information given in the "Basic Level" significantly and mainly addresses teachers of dental universities/schools, postgraduate students, PhD candidates, researchers, material scientists, industrial developers or experts of adjoining professional disciplines. The "Advanced Level" gives a very profound insight into chemistry, physics, testing methods and toxicology of dental resins and their technical application.