Katana YML line

[Koperly]

Anybody has this issue with YML seeing the transition line?
Local rep isn’t helpful. He said to increase 10 C and try. I tried and even went 20C more and still. I sinter on 90 min. Have two different sintering oven ( one is one month old) and both gave same results. Local rep isn’t answering texts.

 

[Koperly]

I don’t find a way to upload a photo

 

[Car 54]

I don’t find a way to upload a photo

You need 2 more posts to be able to do that.

 

[tehnik]

I have the same problem and reseller was talking bs about I am not firing it correctly. It has the exact same program as STML and that does not have the visible line. Later reseller told me (probably after other complaints) that it is not that hard to cover it by staining

So this is material issue and I will talk about it with noritake at IDS and hear what I am doing wrong. I have burned the material in four different ovens (one brand new) and separately from other katana materials. Always the same result.

 

[Toothman19]

Have you calibrated your oven?

 

[tehnik]

Have you calibrated your oven?

Have you used the material?

 

[Toothman19]

Every day. Ovens can be off by 50 degrees or more

 

[MrNeverFixit]

Anybody has this issue with YML seeing the transition line?
Local rep isn’t helpful. He said to increase 10 C and try. I tried and even went 20C more and still. I sinter on 90 min. Have two different sintering oven ( one is one month old) and both gave same results. Local rep isn’t answering texts.

Do you have another disc of the same shade you are using? Try it and make sure its a different LOT number or not the same batch. If its not there it means factory production issue. Call your rep to replace the disc and they will recall all the disc.

May be they ignore it because they gona lose alot of money to recall and replace all the disc.

I had a few cases like that with other brands. I used a different disc but making sure not the same batch just to make sure it not the oven issue. I call my rep sent it back and got a replacemnt.

 

[ztech]

For the YML, it looks much better if you nest with the incisal edge tipped back about 20-25 degrees. The allows for the different layers the have an overlap that helps in the visual transition.

 

[Brett Hansen CDT]

Ivoclar's Prime has a gradient transition between it's layers to fix this issue. It's been out for awhile so I assume Katana would have something similar if you didn't want to switch zirconia brands.

 

[rookiee]

I have witnessed serious crap from Katana and gone thru hell and back with them, denying things...Certain LOT numbers were affected but they were pointing at me, my furnace etc...New series and from then on it's perfect again. But my provblem was not regarding lines, haven't ran into it in past 4,5 years using Katana.

What pisses me off that company as Kuraray would goooo alll the way and blaming user when they had evidence on a table, and I still keep all samples and photos. Why not just call customer and say hey, I heard you got issues, send us all material, we will test it and replace it. Is it so hard for a company that makes millions if not billions? And had issues in past with other manufacturers as well, years later reps coming to lab almost crying, how can we make business again. Well, you know where the door handle was sec ago right?

 

[tehnik]

I visited Kurary box in IDS and talked them about the line. They said the line is there and it is because of the different strength of materials in the same disk. They also said it is not visible in the mouth.