The metal helps strengthen the ceramic but the outer porcelain base can still break. These crowns also have to be prepared in a lab. Average Cost: $1,093 per crown (without insurance) Crowns For Baby Teeth: Stainless steel crowns or caps are used to protect
The element was first discovered from the spectrum of the sun so it was named after the Sun Helios. Helium is name is derived from the Greek name Helios-personification of t â¦ he Sun in mythology.
The English name for the element potassium comes from the word  potash , and refers to the method by which potassium was obtained â placing in a pot the ash of burnt wood or tree leaves, adding water, heating, and evaporating the solution.