Procera crowns also known as Zirconia crowns, are entirely metal free and a preferred choice for front teeth. They are durable and robust, stays for a longer time and don’t break easily. Available in different size and color they are translucent enough to look like original teeth. They also fit a better way than the original teeth itself. Zirconia crowns are biocompatible too and thus they can be kept inside your mouth for a longer time without any issues.