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Lab talk, the good, the bad, and the ugly
All Porcelain-Press
Lithium Disilicate
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<blockquote data-quote="sixonice" data-source="post: 4635" data-attributes="member: 2"><p>I believe you are 100% correct and I agree with you. Here is my slice: True, Zirconia substrates are super strong (900-1000mpa depending on what you read). On a layered zirconia, you are correct the weak point is the interface between the zirconia and the build up of glass (90 mpa-like you said). Failures would come in the form of delamination of the ceramic off the zirconia. Now take a Lithium Disilicate, full press at 400mpa, no interface. Both are conventionally cemented. For single units its a no-brainer-the Lithium Disilicate would be better (and MUCH more profitable for the lab!!) Its like comparing 2 bricks that have mortar in between them versus a SOLID brick with no mortar. Zirconia shines on long span anterior bridges and posterior bridges. The substructure design is aso vital in zirconia, where proper support must be adhered to to give the layering ceramic proper support.</p></blockquote><p></p>
[QUOTE="sixonice, post: 4635, member: 2"] I believe you are 100% correct and I agree with you. Here is my slice: True, Zirconia substrates are super strong (900-1000mpa depending on what you read). On a layered zirconia, you are correct the weak point is the interface between the zirconia and the build up of glass (90 mpa-like you said). Failures would come in the form of delamination of the ceramic off the zirconia. Now take a Lithium Disilicate, full press at 400mpa, no interface. Both are conventionally cemented. For single units its a no-brainer-the Lithium Disilicate would be better (and MUCH more profitable for the lab!!) Its like comparing 2 bricks that have mortar in between them versus a SOLID brick with no mortar. Zirconia shines on long span anterior bridges and posterior bridges. The substructure design is aso vital in zirconia, where proper support must be adhered to to give the layering ceramic proper support. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
All Porcelain-Press
Lithium Disilicate
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