A crown (also known as a dental cap) is a laboratory-made restoration that fully covers the entire surface (360°) of a tooth. It is used to restore the tooth’s shape, strength, and appearance, especially when the natural tooth is heavily damaged, decayed, or has undergone root canal treatment.A crown (also known as a dental cap) is a laboratory-made restoration that fully covers the entire surface (360°) of a tooth. It is used to restore the tooth’s shape, strength, and appearance, especially when the natural tooth is heavily damaged, decayed, or has undergone root canal treatment.^ο) ένα φυσικό δόντι. (Αν αφορά σε μεγαλύτερη έκταση, τότε ονομάζεται γέφυρα!) .