Zirconia crowns are the strongest dental crowns. they're made from zirconium, which may be a silicate invented by a German chemist called M. H. Klaproth in 1789. Since the 1960s, zirconia has various medical uses. it's extremely durable and 100% biocompatible, zirconia is employed for various prosthesis in surgeries of hip, finger and ear. Types of zirconia There are two sorts of zirconia: solid and high translucent. Both of them are often made using the CAD CAM technology. CAD stands for Computer Aided Designing and CAM stands for Computer Aided Manufacturing. These technologies offer you a particular fit and unmatchable look.