Crowns, bridges, and veneers are restorations that are made in a laboratory and then cemented or bonded onto teeth. This is done to replace large amounts of missing tooth structure, missing teeth, or for appearance.
A root canal is needed when the nerve inside the tooth is damaged beyond repair. This damage can be from tooth decay or trauma. The nerve is removed, the inside of the tooth disinfected, and a permanent restoration placed.
Dental implants are a predictable way to replace missing teeth. A crown can be placed on the implant to replace a single tooth, or implants may be used in bridges or dentures to replace multiple teeth.