Dentaltown New Grad Edition 2019 - 19

For all single centrals in my office, the patient goes to the lab, they take photos, and the person
making the crown takes the shade and draws diagrams and selects the material. Your tooth preparation needs to be passively just under tissue to eliminate the dark corona at the gingival margin.
A single strand of retraction cord is placed, left in place for a few minutes. Once the tissue is away
from the tooth, the cord is removed and the margin is carefully dropped below this level-keeping
in mind that each operative procedure results in ½mm of gum recession. Good luck! ■

almunk
Member Since: 12/17/05
Post: 2 of 55

5/23/2019

The first problem is trying to match freshly bleached teeth-it's near impossible! The first
crown, the FCZ looked much better at the margin than the PFZ. Apparently the lab used a
translucent zirconia rather than an opaque zirconia. It appears to me that the dark stump must
be blocked out, so you have to use PFM, opaque PFZ or FCZ.
I would suggest using the first crown, the OM1 FCZ. The lab should be able to correct the
shade with surface stain fairly easily. ■

stonedental
Member Since: 05/12/09
Post: 3 of 55

5/23/2019

dr costco

Incorrect ingot selection. ■
5/23/2019

Thanks for your thoughts. Matt, could you expand on that? I usually just send some shade
photos, including one of the prep color. Do you request a specific ingot? Or just a general level of
opacity? Relying on the lab to guess for me obviously wasn't the way to do it. ■

Member Since: 07/02/09
Post: 4 of 55

ns86
Member Since: 12/19/13
Post: 5 of 55

5/24/2019

You have a dark stump. Your options to block it are to do it with a direct composite core and
have a crown with minimal thickness (0.5mm) made out of a translucent material. The other
option is to use a more opaque material for crown fabrication.
Your lab used a translucent material, which dropped in value because of the thickness (glass
effect). The other thing to consider is that you have a fairly high-value, opaque tooth to match.
Had your tech used an LT e.Max ingot, for example, the result probably would have been
significantly better. ■

dr costco
Member Since: 07/02/09
Post: 6 of 55

5/24/2019

BruxZir Esthetic crown. It's monolithic, so no shine-through, but more translucent than
traditional full-zirconia crowns. Problem solved. I think contour is nice, actually; lab did a good
job mirroring the other central incisor. Cement with Ketac or FujiCem. ■

toothbetold333
Member Since: 10/16/16
Post: 7 of 55

5/24/2019

The full conversation is on Dentaltown.com
The message boards are a great way for Townies to share their cases and receive
(or give!) helpful advice. To read this entire message board, go to dentaltown.com
and under message boards, search "Wrong Shade."

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Dentaltown New Grad Edition 2019

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