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The interest of dental research in metal-free restorations has been increasing in the past 20 years following the introduction of innovative all-ceramic materials into daily practice. In particular, high-strength ceramics have widely increased the clinical indications of metal-free prostheses, showing more favorable mechanical characteristics compared to the early ceramic materials ( Zarone et al., 2011 ). During the past decade, new dental ceramic materials, such as glass ceramics, polycrystalline alumina, and zirconia-based ceramics, have been successfully introduced into the clinic, along with new processing technology, i.e., computer-assisted fabrication systems (dental computer-assisted design/computer-assisted manufacturing (CAD/CAM)) ( Miyazaki et al., 2013 ). Zirconia is one of the most promising restorative materials, because it yields very favorable mechanical properties and a reasonable esthetic ( Zarone et al., 2011 ). This chapter reviews various dental composite materials and all-ceramic dental composites, in particular. New trends in toughening of ceramic dental materials are briefly described. |
