A crown is a restoration that covers or "covers" the teeth, restores the normal shape and size of the teeth, and enhances and improves the appearance of the teeth. Tooth crowns are necessary when the teeth are broken down and the fillings do not solve the problem. If the tooth is broken, the crown will hold the teeth together to seal the crack, so the damage will not get worse. Crown crowns are also used to restore teeth, bridge bridges, protect weak teeth from fracturing, recover broken teeth, or cover badly shaped or discolored teeth when there are not enough teeth to support large packings.