Dentaltown July 2017 - 38
message board
Help! None of My Crowns Are Fitting!
So. Many. Remakes.
A dentist's efforts at seating crowns are failing too often for her liking.
Can her fellow Townies identify the cause(s)?
2metoothfairy
Member Since: 12/26/14
Post: 1 of 217
I am going crazy lately! About one out of every five crowns is a remake for me. I'm not sure
if my standards for seating are unrealistic, the crowns lab sucks, my preps suck or my impression
material sucks.
I bought a practice in July and started using the impression material and lab the previous
dentist was using. After having many, many issues, I switched to a better lab but it's way too
expensive, considering I take lots of insurances. I had more success with the expensive lab with
about one out of 10 crowns for remake. (I think that's still high.)
I use Affinis impression material and I take pride in how awesome my impressions are. The
expensive lab even complimented me on how great my impressions and preps are. (Maybe they
were just blowing smoke, though.)
When I seat a crown, I check the contacts, margins, then occlusion, then I take an X-ray if
all is good. If it doesn't seat properly, I adjust contacts if needed, check for gums over the prep
(happens a lot), tight contacts, smooth pointy spots on the prep and adjust the inside of crown
after checking with fit checker. What am I missing? Why does it take so long to seat a crown
when I can seat them?
I talked to the owner of the lab and he didn't have anything major to point out about my
impression or prep, just kept shrugging and saying maybe this or maybe that (none of which
could possibly be the lab's fault).
I sat down with my friend who is a dentist with all my model work and asked her to critique
me, and she said my preps looked good and she doesn't know what to tell me as to why this is
happening.
Does anyone have any suggestions on labs to use in or near Florida? Any suggestions on how
to seat crowns more efficiently? Should I switch from PFM to zirconia? Does anyone use Affinis
impression material with success? (From what I see, it takes good impressions.)
Help! ■
4/11/2017
Triad
What problems are you having? Open margin, overhang, occlusion? ■
Member Since: 06/18/03
Post: 2 of 217
almunk
Member Since: 12/17/05
Post: 3 of 217
4/11/2017
Find another dentist to evaluate your whole procedure. Have the lab pour a solid model
as well. It will be hard for DT to pin down what the problem is. Let us know if you make any
progress. If you just can't find anyone to mentor you, you'll need a good camera and a lot of
photos to get any online help. ■
4/11/2017
2metoothfairy
Member Since: 12/26/14
Post: 4 of 217
Open margins/crown seats in more than one spot or rotates/won't fit down onto the prep by
a lot, even if I shave off all the contacts. ■
4/11/2017
Continued on p. 40
38
JULY 2017 // dentaltown.com
http://www.dentaltown.com
Table of Contents for the Digital Edition of Dentaltown July 2017
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