A crown is a type of dental restoration that completely caps, or encircles, a tooth or dental implant.
Tooth-colored filling material was used to mask the color of the teeth.
Porcelain veneers are wafer-thin, custom-made shells of tooth-colored material that can be placed over your tooth surface to conceal cracks and chips, overlay gaps, and to create a whiter or straighter appearance.
Dentures, of course, are custom made for each individual and can be made to work with any remaining teeth. These are partial dentures.