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The heart is composed of four chambers: two atria and two ventricles. The former are positioned atop the latter. Deoxygenated blood enters the right atrium and ventricle, and is pumped to the lungs in order to receive oxygen. Once it has been replenished with oxygen, blood moves from the lungs to the left atrium and ventricle before it is pumped throughout the body.

Sometimes you have a cavity and it is easily fixed with a filling. When a filling won’t do it, sometimes a crown is needed. A dental crown is actually a false copy of your tooth that is affixed to the irrigated tooth with dental cement. Here we will learn a little bit about how dental crowns work and why they are needed.