CEREC vs Lab

[Kennethk]

I'm 50/50 on this my uppers are made from zirconia I'm looking at getting 24/25 replaced due to RERCT. Though my office doesn't mill zirconia in house I'm only worried about a couple of things. Strength factor and shade. If you have zirconia grinding on eMax is there more of a risk factor with future chipping. I was also told in lab is better at shade matching. I really despise temps. I'm almost done with my dental journey for the year. I don't really mind temps for a bridges it's easier to pop in. As for two bottom temp incisors I'm more worried about constant temps falling off. There was also an issue with my tooth getting lost in the mail which took a month and two weeks to find some I'm hard debating on what to do with my bottom two. Stick with lab zirconia or use in house option.

 

[MattKW]

1. If both the eMax and Zr are well polished, then there shouldn't be a concern about chipping.
2. Yes, labs are usually better for shade matching if you have difficult colours. Good photos with cross-polarisation are usually all that is needed from a dentist.
3. Temporary crowns are just that, temporary. They usually look quite acceptable for the short time you have to wear them. They will only last 2-4 weeks before loosening up.
4. A zinc-oxide type cement is the usual temp cement so the temp crowns can be easily removed; sometimes they loosen too early. If you want a tougher "temporary" cement, then I use zinc phosphate; damn tough stuff that used to be the preferred cement for permanent cementation.The downside is that the temp crowns will have to be split and fractured off, but the residue is easy to clean off. I might use it if a patient is going on a holiday or the lab will be closed down for Xmas.

 

[Kennethk]

1. If both the eMax and Zr are well polished, then there shouldn't be a concern about chipping.
2. Yes, labs are usually better for shade matching if you have difficult colours. Good photos with cross-polarisation are usually all that is needed from a dentist.
3. Temporary crowns are just that, temporary. They usually look quite acceptable for the short time you have to wear them. They will only last 2-4 weeks before loosening up.
4. A zinc-oxide type cement is the usual temp cement so the temp crowns can be easily removed; sometimes they loosen too early. If you want a tougher "temporary" cement, then I use zinc phosphate; damn tough stuff that used to be the preferred cement for permanent cementation.The downside is that the temp crowns will have to be split and fractured off, but the residue is easy to clean off. I might use it if a patient is going on a holiday or the lab will be closed down for Xmas.

It could just be my teeth but I'm always having them fall off even when I requeststronger temporary cement and it usually happens during the weekend. You can imagine someone that's had so many crowns placed are over them when weha e options for same day. Strength is the only worry due to different materials.