There are several situations where your dentist may suggest a crown. If your tooth is cracked, fractured, or worn down, a crown provides protection and prevents further damage. Crowns are also used to cover large fillings, restore teeth after root canal therapy, and complete dental implants. Beyond protection, crowns can also improve the appearance of teeth that are discolored, poorly shaped, or misaligned, giving you both functional and cosmetic benefits in one treatment.