An anatomical crown is the visible part of a natural tooth, made
up by dentin covered with enamel. A dental crown is a prosthetic
crown crafted by a dental technician.
A dental crown can be made as a full porcelain crown, but in
most cases it is made by covering a metal cap with porcelain. The
metal cap is used to give the tooth extra structural strength
(especially in case of molar crowns) and can be made from metal
alloy, gold alloy, or zirconium oxide (a mineral).