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Lab talk, the good, the bad, and the ugly
Metal
C&B Investment problems
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<blockquote data-quote="RDA" data-source="post: 215254" data-attributes="member: 6261"><p>I use a Lang Invest Press, and run it up to 80psi for all of my castings. <a href="http://www.langdental.com/dental-products/small-equipment/investprestm.html" target="_blank">http://www.langdental.com/dental-products/small-equipment/investprestm.html</a></p><p></p><p>For spruing of the cast to abutments, I sprue them towards the top of the abutment at an angle and the run a 20 gauge vent from the base area to the bottom of the ring. The Fujivest II can be very soft to extract from the rings, especially under the twenty minute mark. I also lube up my rings and bases with PAM cooking spray before investing. This has helped with removal from the ring former. These problems have only happened to me on the 60 gram rings. If you are experiencing it on larger rings, you may have a bad batch of Fujivest II , or bad liquid.</p></blockquote><p></p>
[QUOTE="RDA, post: 215254, member: 6261"] I use a Lang Invest Press, and run it up to 80psi for all of my castings. [URL]http://www.langdental.com/dental-products/small-equipment/investprestm.html[/URL] For spruing of the cast to abutments, I sprue them towards the top of the abutment at an angle and the run a 20 gauge vent from the base area to the bottom of the ring. The Fujivest II can be very soft to extract from the rings, especially under the twenty minute mark. I also lube up my rings and bases with PAM cooking spray before investing. This has helped with removal from the ring former. These problems have only happened to me on the 60 gram rings. If you are experiencing it on larger rings, you may have a bad batch of Fujivest II , or bad liquid. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Metal
C&B Investment problems
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