Drizzt
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The problem with any sintered material is a mathematical one and I am told that the trouble starts whenever your design "makes the curve" as is the case with a full arch. Even though Zirconia is a material which contracts equally without regard to mass or position,..the materials we use (especially the new HT stuff) have lots of other stuff in it that will effectively "pump the pooch" when the arch is made. They "solved" this problem by adding a stabilizer bar which, if designed correctly, is supposed to complete the matrix and minimize the arch-math problem( can you say hidden stresses )
Sintron has the same math problem but is actually way more stable probably due to the fact that it is a far less rigid metal, We have actually done an 8 unit that had no rock to it at all but as for a full arch I have 2 magical words for you,...LASER WELDER
I have another MAGICAL phrase for you dude , NO NEED OF A LASER WELDER ! Oh , and in case you haven't noticed , having to laser weld the thing cost money , so add that up to your total cost .
Whatever you say , it is against Amann Girbach's instructions . The stabilizer might work , but if it did why don't they recommend it ?? If you have time and money to spend acting as R&D for Amann , be my guest .
I know that when I mill a full arch , I can bake it 8-9 times , and it will fit the same as it did before I bake it on a solid model . Can you say the same thing about a laser welded sintron full arch ? I don't think so .
Anyway , each lab has its own way of doing things , if it works for you , it is cool . But please , don't try to convince everyone that it is the perfect system . It is a solution , but no way a game changer .