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Simplicity and Fermit

 
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jhulse



Joined: 04 Dec 2007
Posts: 8

PostPosted: Tue Feb 16, 2010 10:36 pm    Post subject: Simplicity and Fermit Reply with quote

I use simplicity and interface to bond in all my porcelain. When doing a porcelain onlay I usually temp it with fermit. I usually use gluma under my fermit temps and haven't had any problems. Perhaps i should be sealing it with simplicity instead. ?

Last week I was doing an onlay and I bonded a few undecuts with composite, so in the process I pretty much used simplicity everywhere. I used no gluma because of this.

When the pt came back for insertion, it was probably the most difficult fermit removal I ever did. It seemed almost as if the fermit was bonded in.
I don't even know what fermit is made of. It doesn't seem like a composite, but it is light cured....

Does anyone have any insite into this? Thanks for your help.

- Jarett
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john kanca



Joined: 14 May 2005
Posts: 6342

PostPosted: Wed Feb 17, 2010 6:52 am    Post subject: Reply with quote

Fermit is a resin and will stick to an adhesive. I like sealing preps but resins like that are contraindicated. You could go back to what you were doing or make a temp first, seal the prep and cement the temp in with something like Ultratemp.
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jhulse



Joined: 04 Dec 2007
Posts: 8

PostPosted: Wed Feb 17, 2010 1:50 pm    Post subject: Reply with quote

Thanks Dr. Kanca. Is the second option, what you do for your onlay temps?
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john kanca



Joined: 14 May 2005
Posts: 6342

PostPosted: Wed Feb 17, 2010 9:17 pm    Post subject: Reply with quote

jhulse wrote:
Thanks Dr. Kanca. Is the second option, what you do for your onlay temps?


Take an impression in Chromaclone before cutting. Cut prep, make temp, take impression, seal and seat temp with Ultratemp.

Viscostat Clear is wonderful for lubricating the prep and stopping bleeding at the same time!

Same for crown preps.

Cool
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