Screw retained full zirconia

[brutal85]

This was our first try at something like this.

model

ready for milling

ready for sintering

out of the sintering oven

and done


Sorry for bad quality in some of those,it was all taken with my phone :/
I'll post some more pics later.. like.. next year

Happy new year!!!

 

[Al.]

Cool case what did you use to make your model. Is that from a wax up? A denture?

 

[brutal85]

Hi Al. Yes it's denture duplicate out of this "Self setting polyurethane composite (50:50)" , its 2 liquid components you mix together and its used to make those round frames the model is glued onto. It's great material to pour,but if you touch it up with burs like we did on mamelons a bit it gets rough underneath.

 

[brutal85]

Here's a couple more

 

[Mark Jackson]

Look great. How do they clean under it?

 

[paulg100]

great technical work.

I hope im wrong, but the aesthetics of this in the mouth are gonna look horrid?, same as using FC zirconia on anterior teeth.

 

[brutal85]

Water pick? I don't really know.
And for the aesthetics..I hope we get some pics back from the dentist.

 

[Gdentallab]

Look great. How do they clean under it?

exactly !
I've done few similar bridges, hybrid not full zirconia, the patients still complains about cleaning. Although they use super floss, waterpic , . . . But whenever they come to regular check up, horrible stuff with really bad fermented odor will come when the bridge is removed.
Or maybe there's a new invention i haven't heard of.
Happy new year everyone.

 

[JohnWilson]

First off I want to start this post off by saying its very clean technical work and I for one appreciate you taking the time to share it. As a member here that shares his failures for the betterment of learning I want to share the following thoughts with you in a non judgmental way.

Since no one pointed out the AP spread I will

Its so linear, the cantilever is way outside of acceptable. Even if the patient is opposing a full denture that appliance is destined to die. As for cleaning, if the ling was opened up a bit more and the base was a bit more convex it would be perfect. In the maxilla on these big hybrids/fixed bridges its phonetics that can really be problematic. I guarantee when you ask any patient if they would rather lisp OR catch food they will choose catch food every time.

On these big zircon cases getting everything and I mean everything nailed down perfect in the mock up is critical. Can we fix up by adding? Sure but who the heck wants to do that?

Again thanks for sharing.

 

[brutal85]

Just fire away guys, that's why i posted it.
The cantilever is a huge problem on this case.. and yes my boss told to the dentist it's a huge risk, and took the case even tho we all know who will be blamed when something goes wrong.

 

[rkm rdt]

Did you fabricate a temp bridge or did you use the denture?

 

[pingvin]

Brutal85, please update us on this one when patient comes for a check up! It is really great work. Did you glaze it only once or several times? Would you tell us which colors you used and where, please?

 

[brutal85]

My boss did the incisal and tissue bake ,glazing also. He uses shofu ceramics and used the zirkonzahn's glaze 2 times on this case and he said he wasn't happy with it and should have used the shofu ones.
The zirkon coloring was done by me with prettau liquids A3 (brush strokes on each tooth:cervical 7x,middle 3-5x - bit too much for what we needed); A1 (incisal 1-2x) ;incisal gray (incisal and occlusal 1x);tissue B (1x,this is where i should have used way more). We were going for A2.

@rkm rdt a denture wax setup was used.

Also,I couldn't really get nice pictures of glazed restoration with my phone, the brightness just kills it or something, i could really use your feedback on anteriors.
I have a bunch of pictures and they are all blured/not in focus. :/

 

[pingvin]

So I assume your boss baked Enamel/Translucent on top of buccal side, but probably a very thin layer? I saw a few restorations on the internet where tech cut back buccal side quite significantly and bake ceramic on it...

 

[paulg100]

didnt realize it had layered ceramic, just on labial?,

thought it was just FC zirconia. maybe will look ok after all then.

As for cleaning, i thought the idea with these was to leave something like V shaped notches in the peripheral edge to allow superfloss/water jet access.

 

[paulg100]

Heres a great example of my reservations with this technique.

Great technical work and the end result looks great on the model, but in the mouth

andreas-pohl - Zirkonzahn GmbH

I think this is without layered ceramic, but it looks exactly how i would expect when using monolithic fc zirconia for the anterior region.

 

[brutal85]

The case you linked is indeed horrid.. to us.
Aside the poor shade pick,tanned patient,and a head on flash .It still looks like some layered PFM cases in that shade.. so..
This case could have been way better with minimal layering and another shade..
And when I say way better, I mean acceptable(for us again).. I think the patient was happy.
Karin Engelhart - Zirkonzahn GmbH
Don't get me wrong, I'm not defending this technique like a blind man.