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Fixed
the metal frame work change ?
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<blockquote data-quote="charles007" data-source="post: 8786" data-attributes="member: 9"><p>Welcome to all, my first post .........</p><p></p><p>Taha,</p><p>You probably can't answer this, the better question is, "Why did your friend send the case out with open margins!!!!!!!</p><p></p><p>Generally speaking, you don't see margin creeping with NP alloys......</p><p>Having not seen this bridge, I would bet that the margins were thinned out way to much, then the margins were sandblasted off....... Or maybe it is marginal creep....Point being, the lab had to see it, why even finish the case.</p><p>Soo much wasted time and money............</p><p></p><p>Marginal creep is more of a bad fitting crown at the margin, margins change after firing porcelain. More of a tight fit, open margins, (bad fitting crown at the margins) </p><p>I no longer use np, but when I used Rex 3 and Tallidums, you don't get marginal creep unlike other precious metals...</p><p></p><p>John Wilson,</p><p>Check with Norbert at Argen on your use of Agelite71, Norbert told me last year that the Zinc in 70+ is a no no. Some labs have problems with Vita and Zinc........ I use vm13 now with argelite 61 with paste opaques with Avante build-up liquid. Wouldn't recommend this to anyone else but I haven't had any problems at all....May change to 75+6 to lower the silver content and for press to metal.......</p><p></p><p>Charles007</p></blockquote><p></p>
[QUOTE="charles007, post: 8786, member: 9"] Welcome to all, my first post ......... Taha, You probably can't answer this, the better question is, "Why did your friend send the case out with open margins!!!!!!! Generally speaking, you don't see margin creeping with NP alloys...... Having not seen this bridge, I would bet that the margins were thinned out way to much, then the margins were sandblasted off....... Or maybe it is marginal creep....Point being, the lab had to see it, why even finish the case. Soo much wasted time and money............ Marginal creep is more of a bad fitting crown at the margin, margins change after firing porcelain. More of a tight fit, open margins, (bad fitting crown at the margins) I no longer use np, but when I used Rex 3 and Tallidums, you don't get marginal creep unlike other precious metals... John Wilson, Check with Norbert at Argen on your use of Agelite71, Norbert told me last year that the Zinc in 70+ is a no no. Some labs have problems with Vita and Zinc........ I use vm13 now with argelite 61 with paste opaques with Avante build-up liquid. Wouldn't recommend this to anyone else but I haven't had any problems at all....May change to 75+6 to lower the silver content and for press to metal....... Charles007 [/QUOTE]
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