The main esthetic drawback of PFM crowns is the metallic infrastructure which is a barrier to light diffusion. Alumina and zirconia based "all-ceramic" restorations now feature high mechanical properties and are reliable prostheses without sacrifying their obvious esthetic and biological qualities.

CAD-CAM generated densely sintered aluminum and zirconia oxide infrastructures for crowns, anterior bridges and laminates are now fabricated in two production centers, one in the US and one in Sweden.

Lab technicians who finalize the restorations and stratify the veneering ceramic are eventually in charge of the functional and esthetic properties of the letter.

The goal of this presentation is to review the modern requirements of metal-free ceramic restorations.