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.
Metal crowns are made of gold. They generally last a long time and won t chip or break. They tend not to wear down your opposing natural teeth. However, the gold colour does not look natural, particularly on front teeth.etal crowns are made of gold. They generally last a long time and won t chip or break. They tend not to wear down your opposing natural teeth. However, the gold colour does not look natural, particularly on front teeth.