Lumineers are a kind of dental veneers which are made from Cerinate. Cerinate is a special type of porcelain. Lumineers are manufactured by a company called Den-Mat Corporation.
Lumineers are used to correct chipped teeth. These can also be used to rectify gaps in the teeth. In cases where teeth discoloration cannot be treated by using conventional teeth whitening techniques, Lumineers can also be used.

Lumineers are becoming more and more popular these days because they are much more advantageous when compared to conventional veneers.
Lumineers are very thin and so the teeth do not have to be ground up before installing them. On the other hand, a layer of enamel has to be removed before installing conventional veneers. Because the same reason, Lumineers are also more easy to place.
Lumineers are not only advantageous but also cheaper when compared to conventional veneers. In fact, they cost as much as 25% less than dental veneers. Lumineers can cost anywhere from $1000-$2000 for a single tooth.
The main disadvantage with Lumineers is that if the procedure is not performed properly, they may visible externally and affect the appearance of the face. Since the teeth are not ground-up before placing Lumineers, they may appear somewhat bigger and out of proportion.
A small bump may also form at the junction between the Lumineers and teeth. Over the years, this can result in other problems such as infections and discolorations.
If you are given the choice between Lumineers and conventional dental veneers, you should always go for Lumineers. This is because they are highly advantageous and the same time cheaper. If the procedure is performed properly, they are very effective.