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Lab talk, the good, the bad, and the ugly
Zirconium
White dots on sintered Zirconia.
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<blockquote data-quote="NormC" data-source="post: 287569" data-attributes="member: 20733"><p>Yep, we have same issue from time to time. I saw it when we had interns (externs?) from dental assisting schools helping in the lab and realized they were not 'dusting' off the green zirconia crowns very well. I got them to use a high pressure air hose for final dusting (dry air from the dental compressor) and the white spots have not returned since. I doubt it's the beads because we had same issue with brand new beads. If it were some other type of contamination, you'd think it would affect all crowns the same, but it's sporadic. Our Aman Girrbach vendor told us sternly NOT to use compressed air to dust off the green zirconia, but we do it anyway. Yes, I could be victim of some cause and correlation fallacy but I'm sticking to my 'dust' theory. So far, compressed air dusting (and not walking under ladders) has solved our issue with those merciless white spots.</p></blockquote><p></p>
[QUOTE="NormC, post: 287569, member: 20733"] Yep, we have same issue from time to time. I saw it when we had interns (externs?) from dental assisting schools helping in the lab and realized they were not 'dusting' off the green zirconia crowns very well. I got them to use a high pressure air hose for final dusting (dry air from the dental compressor) and the white spots have not returned since. I doubt it's the beads because we had same issue with brand new beads. If it were some other type of contamination, you'd think it would affect all crowns the same, but it's sporadic. Our Aman Girrbach vendor told us sternly NOT to use compressed air to dust off the green zirconia, but we do it anyway. Yes, I could be victim of some cause and correlation fallacy but I'm sticking to my 'dust' theory. So far, compressed air dusting (and not walking under ladders) has solved our issue with those merciless white spots. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Zirconium
White dots on sintered Zirconia.
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