Has anyone experienced something like this?

[hdlc]

Came to my Furnace this morning to find this
Same material, same furnace, same program used for years.
Has anyone experienced something like this?

 

[WENDY]

 

[GG - J]

dumb ? - calibration test

almost looks like they went on a purge cycle

 

[hdlc]

yes, it does

 

[Deena8484]

what happened

 

[TheLabGuy]

You're oven got super hot, or those aren't zirconia. Never seen it melt it into a puddle like that ever before...that tray looks hosed now too.

 

[tuyere]

that's a new one. didn't even know zirconia could melt like that, goddamn.

e: apparently zirconia dioxide does melt, but at like 2700 celcius, which... your oven isn't hitting. that's, like, electric arc furnace temperatures, and the only way I know of you can practically hit that 'at home' is using an arc welder and carbon gouging rod, like when you make calcium carbide from lime and carbon black- everybody's made their own calcium carbide, right?

Any possibility it isn't zirconia at all?

 

[bigj1972]

Must have been those new "3D Printed, just as good as, permanent digital crowns"

 

[CoolHandLuke]

or a resin / printed ceramic was not quite cured before being mixed in with the regular zir

but i don't think a lab tech would do something so silly as to mix them up.

either way, its definitely a contaminant that got in with the zir, what contaminant is anyones guess.

 

[Foggy_in_RI]

What material was it?

All that was said was "same material"...

 

[Tayebdental]

Are you sure it’s not marshmallows in a chai latte

 

[zero_zero]

Did you put a honeycomb tray or something in there by accident? . I've seen those melt at sintering temperatures...

 

[GG - J]

years ago ran a full days alumina work on Zr glaze

12 white balls stuck to 12 firing pegs

great times lol

 

[rkm rdt]

 

[Car 54]

years ago ran a full days alumina work on Zr glaze

12 white balls stuck to 12 firing pegs

great times lol

Been there, done that. Fortunately, it wasn't a day's worth of work, but running a emax crown glaze at a Vintage Halo glaze temp, gives you the same results.

 

[ztech]

Been there, done that. Fortunately, it wasn't a day's worth of work, but running a emax crown glaze at a Vintage Halo glaze temp, gives you the same results.

Did that to 5-12 Emax singles with patient in the chair. Prettiest opalescent balls that you would ever want not to see.

 

[Car 54]

Did that to 5-12 Emax singles with patient in the chair. Prettiest opalescent balls that you would ever want not to see.

I laugh with you, but at the same time that is heartbreaking as well, especially with the patient in the chair. With Emax, that is a lot of time and labor. Like the time an employee of a friend of mine was admiring his boss's nice glazed 6 uint pfm bridge and dropped it on the linoleum floor, bending the margin and destroying the bridge.

 

[ztech]

I laugh with you, but at the same time that is heartbreaking as well, especially with the patient in the chair.

What made it worse was that I only put them in the oven to add the halo on the incisal edge, they had already been tried in and the patient, a local socialite, loved them. This was also in the days before I had digital.

 

[Car 54]

What made it worse was that I only put them in the oven to add the halo on the incisal edge, they had already been tried in and the patient, a local socialite, loved them. This was also in the days before I had digital.

As one of the member's signature here says, no good deed goes unpunished

 

[rkm rdt]

Back in my pfm days I remember… you know.. thing…anyway…
Cmon man that was a long time ago. I’m an old man and corn pop was a bad dude… great technician though….anyway.. like ice cream.