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Lab talk, the good, the bad, and the ugly
Zirconium
Long Span Implant Retained Bridges - Problem With Breaking
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<blockquote data-quote="Contraluz" data-source="post: 256855" data-attributes="member: 3357"><p>I don't have too much knowledge in respect to the milling and sintering. Others have chimed in not that. However, there are so many things that can go 'wrong' with bridges this size. You have to adhere to a very tight protocol. From start to finish!</p><p></p><p>Just a few points, I think are important:</p><p></p><p>After sintering, make sure you don't grind into the connectors and, make sure your connectors are as 'big' as possible. If using high speed, always use a hand piece with water cooling. In general, be very gentle when grinding on a frame like that! Have you tried those green 'diamond stones' from Jota?</p><p>Use a very slow heating and cooling program, when firing porcelain, or glazing. You mention something of an old furnace that is used to glaze. If you can not dial in precisely the firing parameters, I would refrain from using it. Also, I always do a 'regeneration' firing, after refinishing the frame.</p><p></p><p>One other factor, on lower arches, the flex of it can cause problems, too.</p><p></p><p>Hope this helps</p></blockquote><p></p>
[QUOTE="Contraluz, post: 256855, member: 3357"] I don't have too much knowledge in respect to the milling and sintering. Others have chimed in not that. However, there are so many things that can go 'wrong' with bridges this size. You have to adhere to a very tight protocol. From start to finish! Just a few points, I think are important: After sintering, make sure you don't grind into the connectors and, make sure your connectors are as 'big' as possible. If using high speed, always use a hand piece with water cooling. In general, be very gentle when grinding on a frame like that! Have you tried those green 'diamond stones' from Jota? Use a very slow heating and cooling program, when firing porcelain, or glazing. You mention something of an old furnace that is used to glaze. If you can not dial in precisely the firing parameters, I would refrain from using it. Also, I always do a 'regeneration' firing, after refinishing the frame. One other factor, on lower arches, the flex of it can cause problems, too. Hope this helps [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Zirconium
Long Span Implant Retained Bridges - Problem With Breaking
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