Lumineers (and Durathin veneers and Empress Thin veneers) are like traditional porcelain veneers to the extent that they are bonded to the front of the tooth to improve the appearance of the tooth. They can be used to straighten, whiten, lengthen and generally improve the appearance of teeth. Unlike traditional teeth they have the advantage of needing little or no tooth preparation. The are simply bonded onto the existing tooth -after some careful planning. So for an instant long lasting way to improve your smile these have become very popular. Traditional veneers required 0.5mm (hardly any) tooth preparation and that put off many patients. Having your own tooth intact underneath is much more reassuring.
