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Lab talk, the good, the bad, and the ugly
Zirconium
Burs for Zirconia
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<blockquote data-quote="sidesh0wb0b" data-source="post: 291899" data-attributes="member: 7594"><p>as much as [USER=1719]@user name[/USER] had an odd approach, he is correct. you shouldnt be grinding that much on sintered zirconia. if you are, you should address it in the pre-sinter state. and thats where the real question is, why? if youre doing that much grinding on sintered zirconia, you are causing microfractures that could lead to significant fractures down the road.</p><p>with that said, we all have to spot something here and there....low speeds, and under water are key. [USER=1022]@sirmorty[/USER] and [USER=5780]@PRO ARTS DL[/USER] are spot on with the wagner setup. me, well i just use a small stone, slowly, under water. smooth with a silicone wheel. and this is of course when i have to touch these things. i really try to avoid it if at all possible. all my grinding is usually spotting contacts until fully seated on a solid cast. 1-3min per crown TOPS for finishing. i do all my work in the design phase and minimize everything afterward. less headaches with remakes and adjustments this way....working smarter not harder. its like when you paint a room in your house....take your time, do the trim painting first. if done right, the rest is a breeze. time consuming up front (sort of, computers make it easier lol) but makes the rest of the process super easy.</p></blockquote><p></p>
[QUOTE="sidesh0wb0b, post: 291899, member: 7594"] as much as [USER=1719]@user name[/USER] had an odd approach, he is correct. you shouldnt be grinding that much on sintered zirconia. if you are, you should address it in the pre-sinter state. and thats where the real question is, why? if youre doing that much grinding on sintered zirconia, you are causing microfractures that could lead to significant fractures down the road. with that said, we all have to spot something here and there....low speeds, and under water are key. [USER=1022]@sirmorty[/USER] and [USER=5780]@PRO ARTS DL[/USER] are spot on with the wagner setup. me, well i just use a small stone, slowly, under water. smooth with a silicone wheel. and this is of course when i have to touch these things. i really try to avoid it if at all possible. all my grinding is usually spotting contacts until fully seated on a solid cast. 1-3min per crown TOPS for finishing. i do all my work in the design phase and minimize everything afterward. less headaches with remakes and adjustments this way....working smarter not harder. its like when you paint a room in your house....take your time, do the trim painting first. if done right, the rest is a breeze. time consuming up front (sort of, computers make it easier lol) but makes the rest of the process super easy. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Zirconium
Burs for Zirconia
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