Dentures are made is cases where all the teeth are missing. They are artificial set of teeth which help the patient to chew food, restore the shape of the face, and improve aesthetics and speech. It takes about 5 sittings to fabricate dentures. Complete dentures can also be retained on dental implants.
Crowns and Bridges are fixed replacement for damaged or missing teeth. Both crowns and most bridges are fixed prosthetic devices. Unlike removable devices such as dentures, which you can take out and clean daily, crowns and bridges are cemented onto existing teeth or implants, and can only be removed by a dentist.