The indirect technique usually involves two appointments because the veneers are fabricated at a dental laboratory. At the first appointment the teeth are prepared, impressions are taken, and the teeth are given a temporary covering. The veneers are back from the laboratory after two or three weeks. The temporaries are removed, and the veneers are bonded to the teeth.The laboratory-fabricated veneers are usually made using porcelain or pressed ceramic, and are aesthetically pleasing.
The advantage of veneers versus crowns is that much less of the tooth material has to be removed, and the procedure is generally less uncomfortable. Veneers are recommended for patients who have large fillings or little tooth structure.