Mar 18, 2016. There are 11 major organ systems in our body. This includes the circulatory, respiratory, digestive, excretory, nervous, and endocrine systems. As well as the immune, skeletal, reproductive, muscle and integumentary systems.
Dental crowns can be made up of all different sorts of materials -- porcelain or a combination of porcelain with metal. The type that's chosen not only depends on where the tooth is situated, but what the condition of the tooth is (how discolored it is and how decayed it is), as well as the condition of the gums.
A RealAge answered. Crowns that appear to be made of silver are probably made of a material called amalgam. Amalgam is a word that in the dental world means that mercury (a metal) is mixed with one or more other metals, including silver, tin, and copper.