Veneers
Veneers are thin shells that cover existing teeth. They are typically made of porcelain rather than composite resin because porcelain does not stain or change color.
Dentists have the tooth in need of a veneer and then take a mold of the tooth. The mold is then used to shape a veneer for the tooth, and each veneer is placed on each tooth one by one, then cemented using composite resin.