DentaltownUK September 2017 - 49

But back to the fit: PFM technique is inherent to some errors. On the lab side, what you
describe is porcelain on the intaglio of the crown not removed/sandblasted. 100% of PFM
crowns have porcelain on the intaglio due to the manufacturing process. It needs to be removed
at each step before going to the next step.
Immediate fix: Have the lab pour a separate, untrimmed single die for you. Make sure to
remind them that the inside of the crown has to be sandblasted. Then, when the next crown
does not fit, trim the margins on the untrimmed die and see if the bad fit is the same. (It will
probably be worse.)
Good luck! ■
4/12/2017

Time the impression material every time. Three minutes is forever if you time it.
You need to check every temp before it's seated. With Pro Temp you can add cheap flowable
if you need it. You are quality control-for your assistant, it's a job; for you, it's that crown you
will be looking at every six months. ■

IMHO
Member Since: 11/12/06
Post: 75 of 217

drillher
Member Since: 04/22/02
Post: 109 of 217

4/12/2017

*
*
*
*
*
*

Reading this thread, I think that I would sum up some of the many good suggestions as follows:
Don't ever reline a C&B impression.
Be aware of the working time of your impression material, and time the impression for the
correct setting time in the mouth.
Don't use flexible plastic triple trays; rather, use low-wall metal ones.
Be sure that your temps fit the margins of your preps so you don't have gingival overgrowth in the interim.
Be watchful for undercuts and sharp edges on your preps.
Go for the correct taper, with no sharp angles that would create a thin fin of dental stone
and fracture off the die, resulting in a die that is that much smaller than your actual tooth.
Let us know if you solve your problems. ■
4/15/2017

Share your suggestions for fitting crowns!
Search: "Crown Remake Help"
Do you have ideas that might help this Townie master her crown technique? Go to
dentaltown.com and search the message boards for "crown remake help"-this
conversation will be the top result.

dentaltownuk.com \\ SEPTEMBER 2017

49



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Table of Contents for the Digital Edition of DentaltownUK September 2017

Cover
On Dentaltown.com
Editorial with Mike Gow
Meet the Team
Howard Speaks
Thinking Implants
John Zamet Memorial Prize in Peridontal
Euro Dental Depot
Berkeley Referral Colleague
Message Board: Over-Drying
Message Board: The Inman Aligner
Care Quality Commission
Love Dental
Message Board: Seating Crowns
Poll: Marketing
The Freelancing Trap
Understanding Survivors of Childhood Abuse
The BACD 14th Annual Conference 2017
Bluephase Style Review
Lifestyle
Students Section
Wishlist
DentaltownUK September 2017 - Cover
DentaltownUK September 2017 - Cover2
DentaltownUK September 2017 - 3
DentaltownUK September 2017 - 4
DentaltownUK September 2017 - On Dentaltown.com
DentaltownUK September 2017 - Editorial with Mike Gow
DentaltownUK September 2017 - 7
DentaltownUK September 2017 - Meet the Team
DentaltownUK September 2017 - 9
DentaltownUK September 2017 - Howard Speaks
DentaltownUK September 2017 - 11
DentaltownUK September 2017 - Thinking Implants
DentaltownUK September 2017 - 13
DentaltownUK September 2017 - 14
DentaltownUK September 2017 - 15
DentaltownUK September 2017 - 16
DentaltownUK September 2017 - 17
DentaltownUK September 2017 - 18
DentaltownUK September 2017 - John Zamet Memorial Prize in Peridontal
DentaltownUK September 2017 - 20
DentaltownUK September 2017 - Euro Dental Depot
DentaltownUK September 2017 - Berkeley Referral Colleague
DentaltownUK September 2017 - 23
DentaltownUK September 2017 - Message Board: Over-Drying
DentaltownUK September 2017 - 25
DentaltownUK September 2017 - 26
DentaltownUK September 2017 - Message Board: The Inman Aligner
DentaltownUK September 2017 - 28
DentaltownUK September 2017 - 29
DentaltownUK September 2017 - 30
DentaltownUK September 2017 - Care Quality Commission
DentaltownUK September 2017 - 32
DentaltownUK September 2017 - 33
DentaltownUK September 2017 - 34
DentaltownUK September 2017 - Love Dental
DentaltownUK September 2017 - 36
DentaltownUK September 2017 - 37
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DentaltownUK September 2017 - 39
DentaltownUK September 2017 - 40
DentaltownUK September 2017 - 41
DentaltownUK September 2017 - 42
DentaltownUK September 2017 - 43
DentaltownUK September 2017 - 44
DentaltownUK September 2017 - Message Board: Seating Crowns
DentaltownUK September 2017 - 46
DentaltownUK September 2017 - 47
DentaltownUK September 2017 - 48
DentaltownUK September 2017 - 49
DentaltownUK September 2017 - Poll: Marketing
DentaltownUK September 2017 - 51
DentaltownUK September 2017 - 52
DentaltownUK September 2017 - The Freelancing Trap
DentaltownUK September 2017 - 54
DentaltownUK September 2017 - 55
DentaltownUK September 2017 - Understanding Survivors of Childhood Abuse
DentaltownUK September 2017 - 57
DentaltownUK September 2017 - 58
DentaltownUK September 2017 - 59
DentaltownUK September 2017 - 60
DentaltownUK September 2017 - The BACD 14th Annual Conference 2017
DentaltownUK September 2017 - 62
DentaltownUK September 2017 - 63
DentaltownUK September 2017 - Bluephase Style Review
DentaltownUK September 2017 - 65
DentaltownUK September 2017 - Lifestyle
DentaltownUK September 2017 - 67
DentaltownUK September 2017 - 68
DentaltownUK September 2017 - 69
DentaltownUK September 2017 - 70
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DentaltownUK September 2017 - 80
DentaltownUK September 2017 - 81
DentaltownUK September 2017 - Students Section
DentaltownUK September 2017 - 83
DentaltownUK September 2017 - 84
DentaltownUK September 2017 - 85
DentaltownUK September 2017 - 86
DentaltownUK September 2017 - 87
DentaltownUK September 2017 - Wishlist
DentaltownUK September 2017 - Cover3
DentaltownUK September 2017 - Cover4
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