so what you are saying is we should never touch Zi with anything oh my god how have i survived these last 18 years using the stuff. oh no all my full arches are going to fail the sky is falling oh wait thats right nothings happened. moove on peeps nothing to see. if Zi was such touchy stuff how can anyone in good conscience even sell it.? .
Agreed, there are basic rules about zirconia, and yes lots of labs had issues at the beginning because they were used to how “easy” fusing glass to gold was (conductivity and sintering behaviors made it easy if frames were designed properly and cte matched.)
All I see is ivoclar trying (again) to justify emax in a world that has moved on, with studies that measure things that have no real bearing on the “real world” challenges limitations and results.
Does porcelain chip or deliminate on zirconia? Sure thing, just like it did on pfms and just like it does on layered emax.
Good design, proper firing parameters and calibrated ovens, not abusing materials and understanding occlusion means the case succeeds.
It’s a little ironic that the company that made empress 2 and Targis vectris, two of the twitchiest, most technique sensitive and least successful materials ever, wants to throw stones about technique sensitivity at the most commonly requested material out there.
Now that I think about it, wasn’t it too narrow of a thermal coefficient match on empress two that caused the entire product line to be recalled and reformulated?
