It takes two working dental visits about 2-4 weeks apart. There are some planning visits prior to the working visits to determine what result you want and some follow-up bite adjustment visits. Porcelain veneers do not stain and are as strong as natural teeth.
Many options exist including Bridges, Implants, and Partials. There is no reason to live with missing teeth. Not only does a full set of teeth improve self esteem but it makes all the other teeth last longer by reducing stress placed on the remaining natural teeth.