IPS e.max LITHIUM DISILICATE

IPS e.max LithiumDisilicate is a high strength ceramic material with360-400 MPa of flexural strength.

When fabricated to full-contour in a monolithic state, lithium disilicate is anextremely durable material.

Failures in zirconia veneered restorations are the result of a layering material with a strength of 80-120 MPA, having chewing forces exerted upon it. The 1,000 MPa zirconia substructure remains intact but the failure of the layering porcelain is ultimately a failure of the restoration.

With monolithic lithium disilicate, the work of mastication is beingdone on a 360-400 MPa material. This strength is homogenous through out the entire restoration.

Several internal Ivoclar Vivadent tests have demonstrated that the monolithic lithium disilicate crowns are incredibly durable and that the zirconia veneered crowns fail with less load and fewer chewing cycles.

In order to validate these findings, Ivoclar Vivadent called upon the expertise of New York University (NYU). The researchers at NYU are authorities on dental materials and have conducted numerous studies investigating the longevity and performance of a wide array of dental materials.

*Mouth Motion Fatigue and Durability Study

Petra C Guess, Ricardo Zavanelli, Nelson Silva and Van P Thompson, New York University, March2009

1 90% failure by 100,000 cycles

2 No failures at 1 million cycles