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Lab talk, the good, the bad, and the ugly
Zirconium
Death by Zr
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<blockquote data-quote="charles007" data-source="post: 41575" data-attributes="member: 9"><p>Distured, your to young to know this, when Vita porcelain came to the US, many labs couldn't use it because of checking... duh CTE issues, thick under supported porcelain....Hmmm ...sounds familar doesn't it <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p>Same issues among other problems when NP was being used years ago. </p><p>Still think Vita is the best porcelain on the market.</p><p>For me and many others, it didn't take a book or lecture to know that porcelain must be supported no matter what substructure is used, metal or zirconia ! Now its been several years since labs learned that zirconia must be cooled very slowly with properly supported substructures, and higher fired wash bakes... Now we have proper techniques so that zirconia crowns are equal to pfms with better fits and no black lines </p><p></p><p>OK, had a bad week....shoot me down if you have more knowledge than me<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" />.....</p></blockquote><p></p>
[QUOTE="charles007, post: 41575, member: 9"] Distured, your to young to know this, when Vita porcelain came to the US, many labs couldn't use it because of checking... duh CTE issues, thick under supported porcelain....Hmmm ...sounds familar doesn't it :) Same issues among other problems when NP was being used years ago. Still think Vita is the best porcelain on the market. For me and many others, it didn't take a book or lecture to know that porcelain must be supported no matter what substructure is used, metal or zirconia ! Now its been several years since labs learned that zirconia must be cooled very slowly with properly supported substructures, and higher fired wash bakes... Now we have proper techniques so that zirconia crowns are equal to pfms with better fits and no black lines OK, had a bad week....shoot me down if you have more knowledge than me:D..... [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Zirconium
Death by Zr
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