VM9!!! Nightmare

[PinAn]

Hi guys I have a question

How do I avoid this ?

 

[PDC]

Could be multiple things. First thought is not enough condensing. Could also be too high entry temp.
I would try firing a thin layer of base dentin before doing your final build.
Hope this helps.

 

[doug]

Are you sure you used the correct build-up liquid?

 

[ps2thtec]

Could be multiple things. First thought is not enough condensing. Could also be too high entry temp.
I would try firing a thin layer of base dentin before doing your final build.
Hope this helps.

And with a Thin blade, cut through to the frame separating the units to avoid tears.

 

[2thm8kr]

And with a Thin blade, cut through to the frame separating the units to avoid tears.

And tears

 

[PinAn]

Yes I have used vita build up liquid
My step is
1. Liner with 970
2. Akzent stain and interno with 900
3. Dentine and enamel with 910
Then bang!!

Why need condensing ? As I know don't let ceramic dry when you build up, right?

 

[adl]

Yes I have used vita build up liquid
My step is
1. Liner with 970
2. Akzent stain and interno with 900
3. Dentine and enamel with 910
Then bang!!

Why need condensing ? As I know don't let ceramic dry when you build up, right?

You need to condense when you are done building up before placing it in the oven. Don't let anyone fool you.

 

[adl]

You need to condense when you are done building up before placing it in the oven. Don't let anyone fool you.

You might want to check for air pockets between the centrals before you do another bake.

 

[PinAn]

Wasn't condense will let color mix together?

 

[adl]

Wasn't condense will let color mix together?

No

 

[rkm rdt]

porcelain is like your junk
The bigger it gets,the more it will shrink

 

[PinAn]

So I when I finish I need condense to let it smaller?

 

[PinAn]

Or I need condense when I finish body and enamel part? Or just when I finish it

 

[adl]

You'll also notice the porcelain will be more vital with less pits

 

[adl]

Or I need condense when I finish body and enamel part? Or just when I finish it

You should condense as you go,just don't dry it completely since you can't add wet porcelain to dry porcelain.when you are all done then condense really well. Make sure your program and oven are up to par. They are so many factors that can influence this,make sure the porcelain has the right consistency .

 

[PinAn]

Ok thanks guys I will try

 

[PinAn]

I feel vita VM system so hard , is there have a book for VM system?

 

[rkm rdt]

Less porcelain with more bakes
Do an interproximal bake only
Don't slice it.
Then do another bake to full contour,not bigger.
Then do a 3rd bake to finalize the shape you want.
No grinding until the end,not in between bakes.

 

[rkm rdt]

I prefer condensed milk in my coffee.
I let the furnace condense my porcelain,duh!

 

[cadfan]

https://www.vita-zahnfabrik.com/en/Chapter-28410,,122286.html

step by step.