Principle of Advanced Press

Lithium disilicate ceramics are an increasingly popular material for fabricating restorations in dental laboratories. They are characterized by their high strength and can be processed not only by CAD/CAM but also by a pressing technique similar to the one used with traditional pressable ceramics.
However, the resulting quality of pressing Lthium Disilicate has varied greatly. Due to it's sensitivity to temperature while in contact with phosphate-bonded compounds common among investments.

Temperature differentials between the inside and outside of rings have always existed when processed in traditional pressing ovens. Differences on the order of 30°C–50°C – depending on the size of the ring and the conductivity of the investment compound – pose an obstacle to consistent pressing outcomes. If more energy is briefly supplied to the ring, however, its outside temperature will rise to
beyond the predefined level for ceramic processing, while the object is still exposed to a lower temperature level inside the ring. Once energy has been supplied for a specific (pre-calculated) time, the heating unit of the furnace will shut down. From that point on, the heat from the external aspects of the ring will continue to be transmitted toward its centre.