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IPS e.max

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Lithium Disilicate Update

IPS e.max Lithium Disilicate ®

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Ivoclar Vivadent patented glass ceramic formulation Two methods of fabrication 4 Translucencies – MO, HO, LT, HT

IPS e.max Lithium Disilicate ®

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Monolithic strength when fabricated to full contour 360MPa flexural strength for CAD 400MPa flexural strength for Press Conventional or adhesive cementation options Minimally invasive dentistry • Can be pressed to 0.3mm for minimal prep or “no prep” veneers • New HT exhibits chameleon effect ideal for inlays and onlays

Material Properties

IPS e.max Press Thin Veneer

IPS e.max Press can be used for the fabrication of very thin veneers (minimal Prep). If sufficient space is available, e.g. retrusion of a tooth, no preparation is required. The press technique provides a more intimate fit than other veneer fabrication techniques.

The following minimum thicknesses for fabricating thin veneers have to be observed:

labial

incisal

0.3 mm

0.4 mm

Veneer Test Fit SEM Feldspathic Veneer (Foil Technique)

Veneer Test Fit SEM Feldspathic Veneer (Refractory Technique)

Veneer Test Fit SEM e.max Press Veneer

Other Advantages 

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Higher edge strength vs. traditional glass ceramic materials (can be finished thinner without chipping) Low viscosity of heated ingot enables pressing to very thin dimension (minimal prep or no-prep veneers) Chameleon effect due to higher translucency

Flexural Strength 1200 1100 1000 900 800 700 600 500 400 300 200 100 0 Feldspathic

Pressed Leucite

Lithium Disilicate

Aluminum

Zirconia

Monolithic Lithium Disilicate vs. Zirconia 

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Monolithic crowns are a single ceramic and strength throughout Monolithic lithium disilicate exhibits similar or better load to failure ratings compared to zirconia restorations.

Zirconia restorations have a very strong substructure covered by a significantly weaker ceramic High rates of “zirconia failures” are the result of the layering ceramic being compromised

IPS e.max Load to Failure 3500

Failure Load (N)

3000 2500 2000 1500 1000 500 0

IPS e.maxCAD Conventional Cem.

IPS e.maxCAD Adhesive Cem.

Zirconia Conventional Cem.

Zirconia Adhesive Cem.

PFM Conventional Cem

Material/Layering and Cementation Type

Monolithic vs. Zirconia

Monolithic Lithium Disilicate Crown

Zirconia Crown

90 MPa

1000 MPa 360 – 400 MPa