Cercon Smart Ceramic is one type of porcelain by Dentsply Sirona. The ceramic crowns are made from high-performance zicronium oxide that has been in use for along time – in diverse applications such as the space shuttle and artificial hip joints. Cercon crowns are strong, fracture resistant and pleasing to the eye. They are about five times stronger than conventional porcelain. Most importantly, zirconium is biocompatible, therefore it is a good choice as a dental material for restorations because it is chemically unreactive.