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Lab talk, the good, the bad, and the ugly
Porcelain
Porcelain repair
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<blockquote data-quote="2thm8kr" data-source="post: 155723" data-attributes="member: 1367"><p>Talking with a doc friend of mine about this today. He said he hasn't had much long term success repairing porcelain with composite. His technique is to etch and silanate, then build directly. His theory is the moisture in the porcelain affects the bond.</p><p></p><p>My thoughts, before you start drying the restoration use some lab putty to make an impression of the damaged area and make a indirect composite.</p><p>Then silanate the dried restoration and bond it in place.</p><p></p><p>When I have to dry an old porcelain restoration. I usually set my muffle idle temp to 100c and let it dry and preheat for an hour or so. I then close the muffle and leave it overnight.</p><p></p><p>I know you have to do it same day, but I think you'll see it again soon if you don't get it thouroghly dry. My $.02</p></blockquote><p></p>
[QUOTE="2thm8kr, post: 155723, member: 1367"] Talking with a doc friend of mine about this today. He said he hasn't had much long term success repairing porcelain with composite. His technique is to etch and silanate, then build directly. His theory is the moisture in the porcelain affects the bond. My thoughts, before you start drying the restoration use some lab putty to make an impression of the damaged area and make a indirect composite. Then silanate the dried restoration and bond it in place. When I have to dry an old porcelain restoration. I usually set my muffle idle temp to 100c and let it dry and preheat for an hour or so. I then close the muffle and leave it overnight. I know you have to do it same day, but I think you'll see it again soon if you don't get it thouroghly dry. My $.02 [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Porcelain
Porcelain repair
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