Dental crowns are one of the best ways to protect badly damaged teeth. In most cases, crowns are needed on back teeth that may have needed a root canal treatment. For front teeth, the most common reason for the need of a crown is due to trauma . This could be from a childhood playground accident or a sports injury for example. Ouch!

If a front tooth crown was placed many years ago, over time there will have been changes in the mouth including the level of the gums and the shape and colour of the teeth. This often why there is a 'black' line around old crowns where the gum has receded and the underlying root becomes visible. Older crowns will have been made with a metal base, called a metal ceramic crown and the metal can also show as the tissues change.