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Lab talk, the good, the bad, and the ugly
Zirconium
Green state zirconia in ultrasonic?
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<blockquote data-quote="moli831" data-source="post: 258657" data-attributes="member: 16908"><p>at the last lab I worked at, we mildly brushed off the pucks prior to removing from miller (helps to keep miller arm clean to prevent retaining screws from stripping/locking on). Then the disks were put in a sandblasting cabinet (repurposed to contain the zirconia dust) to be blown off with compressed air hose while brushing anatomy and interior of restoration. Next, units were cut and the sprue smoothed off, blown off again, then put in the ultrasonic for 5 minutes...small container with plastic grate inside (never had one break or chip). Once ultrasonic cycle was done, the restorations were blown off once more then put in a microwave for 10 minutes, then placed under a heat lamp for another 15 minutes, dipped( yeah, I know...been a little while, then under the heat lamp once again for 20 minutes. restorations were then sintered in 6 hour cycle, 125+ units.</p><p>At this lab, they just cut them out and blown them off once, before sintering. minimal issues with dust affecting fits...nothing a diamond burr could not fix.</p></blockquote><p></p>
[QUOTE="moli831, post: 258657, member: 16908"] at the last lab I worked at, we mildly brushed off the pucks prior to removing from miller (helps to keep miller arm clean to prevent retaining screws from stripping/locking on). Then the disks were put in a sandblasting cabinet (repurposed to contain the zirconia dust) to be blown off with compressed air hose while brushing anatomy and interior of restoration. Next, units were cut and the sprue smoothed off, blown off again, then put in the ultrasonic for 5 minutes...small container with plastic grate inside (never had one break or chip). Once ultrasonic cycle was done, the restorations were blown off once more then put in a microwave for 10 minutes, then placed under a heat lamp for another 15 minutes, dipped( yeah, I know...been a little while, then under the heat lamp once again for 20 minutes. restorations were then sintered in 6 hour cycle, 125+ units. At this lab, they just cut them out and blown them off once, before sintering. minimal issues with dust affecting fits...nothing a diamond burr could not fix. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Zirconium
Green state zirconia in ultrasonic?
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