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Fixed
cracks in d.sign pfm bridge after glaze
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<blockquote data-quote="user name" data-source="post: 19913" data-attributes="member: 1719"><p>Where are the cracks? Depending...could be too much unsupported porcelain, or bridges with massive metal in the pontics... Dont know what your porcelain is but Id suggest slow cool. Are the cracks evident as soon as it comes out of the oven, or showing up after its been sitting a bit? Where does the CTE of your alloy fall into the recommended range for that porc.? It all matters, but for a 'fix-NOW', Id go with a slowww cool. Use thin metal pegs, not heavy refractory type. Sorry to hear this.</p></blockquote><p></p>
[QUOTE="user name, post: 19913, member: 1719"] Where are the cracks? Depending...could be too much unsupported porcelain, or bridges with massive metal in the pontics... Dont know what your porcelain is but Id suggest slow cool. Are the cracks evident as soon as it comes out of the oven, or showing up after its been sitting a bit? Where does the CTE of your alloy fall into the recommended range for that porc.? It all matters, but for a 'fix-NOW', Id go with a slowww cool. Use thin metal pegs, not heavy refractory type. Sorry to hear this. [/QUOTE]
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cracks in d.sign pfm bridge after glaze
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