Crowns are also known as “Caps”. It is a tooth shaped cap that fits over your teeth. Crowns are placed on teeth that have been structurally weakened by decay or after root canal treatment, or teeth that have cracks or large fillings on them. Crowns can also be used to cosmetically improve the appearance of your teeth. A Bridge is an artificial tooth supported by the teeth on either side of the space. Unlike dentures, this is a fixed option for filling in spaces where tooth or teeth use to be.