A crown is known as a full-coverage restoration. Crowns can be used to hold together cracked teeth, cover root canal treatments, cap teeth that have been damaged by decay, and help those teeth be more resistant to further decay.
Crowns can also be used to correct tooth colour and alignment defects, as well as correct structural damage to individual teeth. Having a crown placed is more invasive than getting a veneer, but it provides more reliability when added bite-strength is required.
Your dentist will take impressions of your teeth, then the restoration is shaped to match the part of the teeth it will replace. The restoration is attached with dental cement.