Tips for Blending Zirconia Restorations

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[@zonachristian9746]

..about the person with his shade inaccuracy to me it looks like Contamination ..check heating elements and do the Purge of your sinter furnace ..to be absolutely sure that it is contamination during Purge process put inside WHITE Zirconia (it must be white so you can see if it is contaminated or not )..and your final temperature must be higher then your working temperature by atleast 50C ..eg if you sinter at 1500C purge is done at 1550c my Tip ..there is a thing called "Refractive Index" in Natural teeth is 6.0 in Feldspathic Porcelain is 5.1 in Zirconia is 2.1 ..the closser the RI is to the 6(the natural tooth the less visible is) ..Iron Fe is with 0 ,.....now that being said ..mistake comes form using Feldspatic Shade guides its in 90% VITA Classical ..Chroma\Hue\Value and is thick 4mm .. and now what is Zirconia ?!?! PPL please make your life easier and dont mix apples with oranges ..just create your own Shade Guide with Zirconia crowns eg A1 A2 etc and give it to your doctor ..its not hard and you always getting predictable result .. VITA ClAssic Shade guide or 3D one is like PFM for example " metal with Opaquer A1 ..above opaquer is used NECK 1(which is 73% reflective)then Dentin A1(which is 33% reflective)and is covered with ENAML EN1 which is actually mixture of Enamel EN1 and Dentine A1 (3/1) and its total thicknes is 4mm Doctor James Klim said" in cases where he needs A1 he uses disk A3| ..well yes thats easyer because Chroma for A1 is A3 ..but Chroma for A2 is B3 and for A3 is B4 and for A3.5 is 4M3 ..but thats just chroma and works perfectly in layered ceramics it does not work with Zirconia ..bcz to get a correct tooth shade you need Chroma HUE and Value ....you cant control it with zirconia ..so again just make your own Shade guides from exact material you use (id does not need to be done all in one go ..if you today have to mill A1 and B2 use that opportunity to mill A1 and B2 for your custom lab specific shade guide

[@KlimDDS]

I appreciate your thorough response. The nature of my video was for those who have an in-office lab and in-office systems to process the materials using three primary furnaces with specific Zirconia brands. These are the offices that follow this channel. I am aware of the perspectives you bring up and have presented the refractory index blending factor with ceramics lectures, including at the AACD. Anyway, all the best. Thanks for your input.

[@user-yt6gs9rg1j]

dou you make texture on the glaze? How do you polish the glaze if you wear it down?

[@KlimDDS]

I only place glaze on surfaces that show for aesthetic purposes. No glaze on occlusal surfaces subgingival. The labial surfaces on zirconia are textured before sintering. It is possible to put texture on a zirconia surface using the Structure material with Miyo after sintering. I prefer pretexting and using the brush on ceramic from the MiYO system.

[@kevinharland6844]

How do you like using ivocolor on zirconia? That is what we currently have, is it worth it to get MiYo850?

[@KlimDDS]

Ivocolor works well on zironia as well as ceramics. If you go to the Ivoclar website, you will find recommended firing temperatures for Ivolar; program your furnace accordingly, and you will do great. MiYO 850 is better for e.max. There is the regular MiYO made for zirconia. I use both Ivocolor and MiYO regular on zirconia.

[@kvgolfa]

Why do you like zirconia for patients with caries issues?

[@KlimDDS]

Polished zirconia collects fewer biofilms than a natural tooth. In addition, it is easier to finish margins subgingivally and has a proficient cementation protocol with RGI. All the best.

[@thestigisme2349]

​@@KlimDDS Agreed! Definitely like the cariostatic effect of RMGI's