Dental crowns are for patients who have:
Root canal therapy: following root canal therapy the tooth is more fragile than a normal healthy tooth and a crown is usually placed over the tooth to protect the root canal from bacterial invasion and the tooth from fracturing.
Large dental fillings: large fillings can cause the tooth to be susceptible to fracture. A dental crown can help to protect the remaining underlying tooth structure from breaking.
Severe tooth decay: Cosmetics: dental crowns can be used to change the shape and also shade and aesthetics of teeth to enhance the appearance and change your smile.