Zirconia crowns without milling?

[erykd1]

Just saw this pop up in my news feed.
Continental Dental Ceramics, Inc. Receives New Patent for the Process for the Fabrication of Dental Restorations

 

[Affinity]

I was wondering when this was going to happen.. sounds interesting, but how do you get the cad design into the hydrocolloid mold. This could be a 'game changer' or it could be another Wol-ceram.. I wonder who will buy the patent?

 

[rc75]

Interesting.

 

[JayH]

I was wondering when this was going to happen.. sounds interesting, but how do you get the cad design into the hydrocolloid mold. This could be a 'game changer' or it could be another Wol-ceram.. I wonder who will buy the patent?

Who needs a CAD design? Sounds like the process will mirror doctor-made temporaries

 

[zero_zero]

Reading through the patent, it seems to be a very time consuming process , the patent does not mention how the hydrocolloid mould is fabricated

 

[JMN]

Reading through the patent, it seems to be a very time consuming process , the patent does not mention how the hydrocolloid mould is fabricated

I might have missed it, but I didn't see reversible hydrocolloid anywhere, just hydrocolloid. So I'm thinking @JayH is right on the money with chairside temp method and them using alginate.
Fill with whatever's going expired, impress, prep, squirt zirc goo and reseat impression. Remove and sinter zirc goo. The rest is normal. Whatever that is.

 

[Affinity]

Cant wait to see this come to market..

 

[CoolHandLuke]

junk

 

[Brett Hansen CDT]

I assume the zirconia doesnt shrink during sintering with this method?

 

[rkm rdt]

there goes our jobs again...

 

[CoolHandLuke]

I assume the zirconia doesnt shrink during sintering with this method?

https://patents.google.com/patent/U...tal&q=ceramics&oq=continental+dental+ceramics

yes it shrinks.they state 1 hr sinter at 1550, so it undoubtedly is a variation on envisontec's old zirc soup

juuuuuunk

 

[grantoz]

it sounds like inceram from vita to me . It came out in the late eighties early 90s it is a lot of rooting around it did work.you took the die you were working on duplicated it then used a special plaster that expanded to the correct amount then you applied the alumina slurry the plaster absorbed the water this made it dense then you sintered the plaster shrunk more than the alumina .then you shaped up the alumina core in the green stage and then you resinted it and also flowed glass thru it. super not time consuming at all. There was a lot more to this as well but i didnt want to write war and peace.

 

[mmbh]

it sounds like inceram from vita to me . It came out in the late eighties early 90s it is a lot of rooting around it did work.you took the die you were working on duplicated it then used a special plaster that expanded to the correct amount then you applied the alumina slurry the plaster absorbed the water this made it dense then you sintered the plaster shrunk more than the alumina .then you shaped up the alumina core in the green stage and then you resinted it and also flowed glass thru it. super not time consuming at all. There was a lot more to this as well but i didnt want to write war and peace.

I remember those days. Sore fingers from sand blasting the excess glass off.

 

[grantoz]

mmbh i forgot about the sand blasting after a while we used to weigh the amount of glass that helped a bit .do you remember using the spinnel mix it looked ok but it was weak like emax when you dont bond it about 350 mpa.

 

[mmbh]

Wow, spinnel, I almost forgot what all that stuff was even called.