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Lab talk, the good, the bad, and the ugly
Zirconium
FCZ coloring, liquid? or paste?
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<blockquote data-quote="CoolHandLuke" data-source="post: 189693" data-attributes="member: 4850"><p>you are about to experience a gigantic pain in your butt.</p><p></p><p>so much stuff can go wrong.</p><p></p><p>it is incredibly difficult to troubleshoot the process as an outsider, because everything (EVERYTHING!) matters. from the manufacturer of the oven, to the specific sintering variables, to the amount of liquid applied, to the thickness of the zirconia, to the modifiers applied.</p><p></p><p>if your zirconia provider gives no SPECIFIC instruction as to shading, you need to switch zirconia providers. do not stop and try to solve this on your own.</p><p></p><p>let me give you an example why troubleshooting this is a bad idea.</p><p></p><p>waaaaay long time ago i was head of cadcam at another lab and the owner directed us to use such a brand of zirconia and some shading liquid called Vita YZ.</p><p></p><p>anyway, the first one we made was very much the same result you experienced. quite yellow. not good colour, no translucency... big problem. so we made modifications - added water, raised temperature, less time spent with dipping, added modifiers with another shading liquid, drying under heat lamp, and many other things. </p><p></p><p>there was nothing we could do to make this work, so we stopped using this liquid and made big complaints to vita. we switched to the new zirkonzahn system, it was very new at this time and few people were using it. but it had something the vita never had - a very detailed explanation of how to paint the colour on the units, how to treat it before sintering, and how to modify it to our taste.</p><p></p><p>it was a gift from heaven. the very first crowns were perfect.</p><p></p><p>of course, afterward having modified it heavily, that was the end of my time as head of cadcam at that company - and that boss still texts me with chitchat monthly.</p><p></p><p>so no, don't waste a pile of zirconia and time and money trying to sort this out.</p><p></p><p>seek a system with a great degree of precision details about how to make it work. this will give you insight into the intricate delicate handling procedures that make great FCZ.</p></blockquote><p></p>
[QUOTE="CoolHandLuke, post: 189693, member: 4850"] you are about to experience a gigantic pain in your butt. so much stuff can go wrong. it is incredibly difficult to troubleshoot the process as an outsider, because everything (EVERYTHING!) matters. from the manufacturer of the oven, to the specific sintering variables, to the amount of liquid applied, to the thickness of the zirconia, to the modifiers applied. if your zirconia provider gives no SPECIFIC instruction as to shading, you need to switch zirconia providers. do not stop and try to solve this on your own. let me give you an example why troubleshooting this is a bad idea. waaaaay long time ago i was head of cadcam at another lab and the owner directed us to use such a brand of zirconia and some shading liquid called Vita YZ. anyway, the first one we made was very much the same result you experienced. quite yellow. not good colour, no translucency... big problem. so we made modifications - added water, raised temperature, less time spent with dipping, added modifiers with another shading liquid, drying under heat lamp, and many other things. there was nothing we could do to make this work, so we stopped using this liquid and made big complaints to vita. we switched to the new zirkonzahn system, it was very new at this time and few people were using it. but it had something the vita never had - a very detailed explanation of how to paint the colour on the units, how to treat it before sintering, and how to modify it to our taste. it was a gift from heaven. the very first crowns were perfect. of course, afterward having modified it heavily, that was the end of my time as head of cadcam at that company - and that boss still texts me with chitchat monthly. so no, don't waste a pile of zirconia and time and money trying to sort this out. seek a system with a great degree of precision details about how to make it work. this will give you insight into the intricate delicate handling procedures that make great FCZ. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Zirconium
FCZ coloring, liquid? or paste?
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