Zirconium dioxide, or ZrO2, is often called zirconia but is important to distinguish from zircon. The substance is a crystalline oxide of zirconium, which is usually bright white in color, and is often called “ceramic steel.” It’s an extremely strong substance One of the most common forms of zirconium dioxide is dopant stabilized cubic structured zirconia, or better known as cubic zirconia, or simulated diamonds. In dentistry, zirconium dioxide is used widely by dental professionals as a ceramic oxide. The substance can be used in a variety of applications, including dental crowns, bridges, implants, and inserts, and has been shown to have an excellent safety profile and biocompatibility. Zirconium dioxide nanoparticles are also not harmful to other living organisms, including bacteria, making it a great choice for bone implants as well. Other popular ceramic systems among dental professionals include silica, alumina, leucite, and lithium disilicate.