A veneer consists of a thin restorative material which is applied over the tooth to strengthen it or improve its appearance. Veneers have a few advantages over crowns. Specifically, applying veneers does not require large portions of the tooth to be removed; they are also more suitable for teeth with fillings or a weak structure. Veneers can be placed using a direct or indirect procedure. In the first, the veneer is bonded to the tooth via a resin agent. The indirect method generally requires two appointments. In the first appointment, impressions of the teeth are made and a lab custom makes the veneers from porcelain or ceramic. The color matches surrounding teeth to contribute to a beautiful smile. Temporary veneers are applied to the teeth until the next appointment, typically two to three weeks later, when the lab-made veneers are attached to the teeth.