A dental crown is also known as a dental cap. It is a hollow, artificial tooth-shaped cover that is used for teeth that are damaged or decayed. The crown or cap is made to match the shape, size and colour of surrounding teeth for a natural look. The crown or cap also strengthens the tooth.
After the crown is permanently cemented into place on top of the tooth, it completely covers the entire top portion of the tooth that is above the gum line.