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Thinking investing in a fex denture machine
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<blockquote data-quote="JTG" data-source="post: 214909" data-attributes="member: 13923"><p>Grind out the area where you are going to add, basically roughen up a few mm around the are you want to have a bond to. Lets say you're doing a tooth add on, #5, and putting a clasp on #6 because there was one on #5. So, roughen up the area where you're going to set the tooth, and go a few mm past where you want the bond. This is the same concept as roughening up an area where you would add repair acrylic. Now wax as normal, and make sure there is wax a few mm down on the existing material. Now invest as you would a notmal flexible partial, making sure you cover up everything in stone except for where you are adding material. Sprue that area as normal and finish the investment. Boilout as normal. When you are ready to inject the repair, start heating the canister as normal, and then put thw bottom half of the flask in boiling water (side with the existing partial). When you have 5 mins left before injecting (i usually do around 3, but have to work fast) pull the flask out of the boiling water. I usually hold it upside down so the water will drip out. I then wipe the existing exposed material with a paper towel to get any wax residue off of it that might be left from my boil out. I then paint some fusing liquid on it (tcs or valplast brand),close the flask and inject. Have done a lot and never had a bonding issue. I've used the same method with the same fusing liquid on duraflex and flexite with no problems as well. Hope this helps, good luck!</p></blockquote><p></p>
[QUOTE="JTG, post: 214909, member: 13923"] Grind out the area where you are going to add, basically roughen up a few mm around the are you want to have a bond to. Lets say you're doing a tooth add on, #5, and putting a clasp on #6 because there was one on #5. So, roughen up the area where you're going to set the tooth, and go a few mm past where you want the bond. This is the same concept as roughening up an area where you would add repair acrylic. Now wax as normal, and make sure there is wax a few mm down on the existing material. Now invest as you would a notmal flexible partial, making sure you cover up everything in stone except for where you are adding material. Sprue that area as normal and finish the investment. Boilout as normal. When you are ready to inject the repair, start heating the canister as normal, and then put thw bottom half of the flask in boiling water (side with the existing partial). When you have 5 mins left before injecting (i usually do around 3, but have to work fast) pull the flask out of the boiling water. I usually hold it upside down so the water will drip out. I then wipe the existing exposed material with a paper towel to get any wax residue off of it that might be left from my boil out. I then paint some fusing liquid on it (tcs or valplast brand),close the flask and inject. Have done a lot and never had a bonding issue. I've used the same method with the same fusing liquid on duraflex and flexite with no problems as well. Hope this helps, good luck! [/QUOTE]
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