Zirconia restoration, Ousng

Extensive research in the field of zirconia
ceramics and CAD/CAM technology has led
to the development of zirconia restorations.
Zirconia exhibits very high strength and high
fracture toughness. Enlarged zirconia copings
are machined from pre-sintered zirconia blocks
to compensate for the sintering shrinkage.
The restorations are later sintered at a high
temperature for several hours. Matching
veneering ceramics are available to achieve an
esthetic restoration for an anterior tooth.
For posterior teeth, monolithic restorations in
which the color is imparted with an intrinsic dye
are used.