Ivoclar Vivadent IPS e.max CAD Labside - Manual (Page 4)

4
e.max
®
CAD
Product Information
IP
S
Material
IPS e.max CAD is a lithium disilicate glass-ceramic block for the
CAD/CAM technique. It is fabricated using an innovative process
which provides an impressive homogeneity of the material. The
block can be processed very easily in a CAD/CAM unit in this
crystalline intermediate stage. The typical and striking colour of
IPS e.max CAD ranges from whitish to blue and bluish-grey. This
shade is a result of the composition and the microstructure of the
glass-ceramic. The strength of the material in this processable inter-
mediate phase is 130 - 150 MPa. After the IPS e.max CAD blocks are
milled, the restoration is crystallized in an Ivoclar Vivadent ceramic
furnace (e.g. Programat ® P300, P500, P700). Unlike with some
other CAD/CAM ceramics, the approximately 20-31-minute, easy-
to-conduct crystallization process neither causes any major
shrinkage, nor are any complicated infiltration processes required.
The crystallization process at 840- 850°C (1544 - 1562°F) results in a
transformation of the microstructure, during which lithium disilicate
crystals grow in a controlled manner. The densification of 0.2% is
accounted for in the CAD software and taken into account upon
milling.
The final physical properties, such as the strength of 360 MPa and
the corresponding optical properties, are achieved through the
transformation of the microstructure.
CTE (100-400°C) [10 -6 /K] 10.2
CTE (100-500°C) [10 -6 /K] 10.5
Flexural strength (biaxial) [MPa]* 360
Fracture toughness [MPa m 0.5 ] 2.25
Modulus of elasticity [GPa] 95
Vickers hardness [MPa] 5800
Chem. solubility [µg/cm 2 ]* 40
Crystallization temperature [°C/°F] 840–850/1544-1562
*according to ISO 6872