A veneer is a thin layer of porcelain or pressed ceramic that is placed over the front side of a tooth. They are generally used to improve aesthetics.
The advantage of veneers versus crowns is that much less tooth material is removed, and the procedure is generally less uncomfortable. Veneers are recommended for teeth that have large fillings or little tooth structure.
Because the veneers will be fabricated at a dental laboratory, it will involve two separate appointments. At the first appointment the teeth are prepared, impressions taken, and the teeth are given a temporary covering. In two to three weeks the veneers are back from the laboratory, the temporaries are removed and the veneers are bonded to the teeth.