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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 and aluminum 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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