zirconia horseshoe fell and broke

[privityli]

What is the problem?
zircon Upcera ST
bake Zirkonofen 600 program-1

 

[zero_zero]

What is the problem?
.........

The problem: pic is not showing....

 

[privityli]

zirconia horseshoe fell and broke

 

[Axis Dental Milling]

Did you have a sintering connector on this?

 

[privityli]

Did you have a sintering connector on this?

Yes

 

[privityli]

milling

 

[privityli]

after the fall of the compound removed to save part of the horseshoe

 

[JKraver]

Fell from the milling puck or it was dropped either way that's a shame.

 

[privityli]

Fell from the milling puck or it was dropped either way that's a shame.

fell after baking

 

[JKraver]

I don't think I understand your problem question. Are you just showing us bad luck? Are you wanting to know why it fell out of the sintering oven? Porcelain oven?

 

[privityli]

the problem is the strength? He did not have to break

 

[privityli]

мне кажется он должен быть прочнее

 

[privityli]

I think he should be stronger

 

[JKraver]

Oh, from the picture it looks as if the #26,28? abutments it looks as if there is very little support/material there. Pretty thin. The connector can be built up more to lingual and make sure it is rounded not sharp into the interproximal it will propagate a crack.

 

[Car 54]

I agree, that looked like it shattered at the thinnest areas, looking to thin.

 

[JKraver]

Make linguals full contour, bulk up the connectors even with that very strange half facial over the abutment it should work fine.

 

[Affinity]

I cant believe nobody has mentioned your zirconia.. what brand is it? Looks generic...?


Orr.. just dont drop it.. haha It only passes the hammer test, not the drop test

 

[JohnWilson]

The joints are very undersized as well, even with out taking a 2d cross section I can assure you its not in spec.

I have hit many singles with a hammer AKA glidewell and thrown small bridges and watched them bounce. I just tried dropping full arch hybrid from 4 feet onto concrete that had HUGE joints and well it fractured all to hell!! hahhaahahhaahah. Go figure, I just wished I filmed it as my staff thought it was a real case in production and that I went nuts. Boy I laughed my ass off

Sorry your bridge broke beef those joints up

 

[Labwa]

If you have not re-milled yet you could potentially dodge a bullet. I don't think this would survive 5 years in the mouth in 1 piece. Redesign with full contour on the lingual maybe? JMO

 

[Car 54]

That's a good point. It's better to have it failed the "drop test" now, to show you how weak it was (and future design considerations) than to have put the rest of your time and labor into it, and it fail for you, the Dr and the patient, and the headache that would've been for all.