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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.
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