Teeth

I'm waiting for a new crown to cure.  I'm trying to remember what it's made of, I want to say lithium disilicate.  So close to dilithium crystals.... It is monolynthic, meaning it comes in a homogenus brick that gets milled down and then fired in a kiln to stabilize the crystal structure.  The process feels fairly new: my dentist stuck a camera into my mouth, got a 3D map of the old crown and the teeth it grinds against, and was able to 3D mill new crown during my visit.