Zirconia appeared in the dental market as a strong yet ugly ceramics. They were Fit only as frameworks that to be veneered later by more esthetic feldspathic ceramics. It was indicated only in bilayered restorations as a substitute to metal alloys. Later, high translucency zirconia was introduced with more esthetic and translucency qualities. It took some of the market share and indications of e.max in monolith restorations and short FDP. More recently super , ultra, and top translucency zirconia emerged in the market having more strength and esthetic qualities than e.max. The e.max is still hanging by a single thread of hope that is its superior bonding to resin cement than zirconia. But who knows what the ceramic scientists and researchers are hiding in their sleeves for us.
Despite the improved aesthetics of Zirconia, Lithium Disilicate still has superior aesthetics and translucency. The main advantage of zirconia is still its compressive and tensile strength, however its biggest issue is that it is not possible to bond it due to the inability to etch the surface, due to its crystalline structure. Bonding of Lithium Disilicate is a significant advantage of this material.
Despite the improved aesthetics of Zirconia, Lithium Disilicate still has superior aesthetics and translucency. The main advantage of zirconia is still its compressive and tensile strength, however its biggest issue is that it is not possible to bond it due to the inability to etch the surface, due to its crystalline structure. Bonding of Lithium Disilicate is a significant advantage of this material.
In addition to the outstanding strength that e.max provides, it offers several other key features that make e.max restorations uniquely beneficial for multiple restorative applications.
1- Esthetics .
2- Precision marginal accuracy in both pressed and CAD/CAM milled restorations.
3- e.max delivers wear rates that are almost identical to enamel.
4- Ability to be layered.
5- Superior bond strength.
E max has superior aesthetic properties while Shade match with zirconia ceramic will remain awkward!!
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