Porcelain Laminate Veneer Therapy Ultra - thin veneer options using no - prep or partial - prep philosophy

During the past 25 years, there has been a lot of discussion regarding the preparation techniques used for porcelain veneers. Calamia and other early pioneers looked at veneers as a non-invasive, additive process and worked primarily with a nopreparation concept. Early on it was found that a little enamel preparation could help to enhance the esthetic outcome and improve the marginal fit. Later, in the mid to late 1990s, pressed ceramic was introduced as a material option. Its excellent esthetics, strength and easier fabrication process paved the way for an industry shift away from stacked porcelain to the pressed product. However, the physical demands of proper pressed-ceramic fabrication required an increased amount of tooth reduction (0.8 to 1.0 mm compared to 0.5 mm for stacked porcelain) to make room for the required thickness of pressed ceramics. Porcelain veneer therapy with pressed ceramics became a more aggressive treatment.