Dental crowns are prosthetic outer teeth that protect roots or damaged teeth and function mostly like natural teeth. They are often used as the final step in a root canal procedure, but they may also be used for cosmetic purposes or to shore up teeth that have been cracked or otherwise damaged. They can also be used as the prosthetics that complete dental implants or bridgework.
Crowns, sometimes also called caps, can be made out of a number of materials, including gold, porcelain and porcelain-fused-to-metal. The ivory appearance of porcelain obviously makes it a highly desirable choice for people who want a look that matches their other teeth, but the actual choice of the material will be a matter for discussion between the doctor and patient.