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Cement Gap and Surpass

 
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dvaughan15



Joined: 24 Feb 2010
Posts: 5

PostPosted: Thu Aug 14, 2014 1:33 pm    Post subject: Cement Gap and Surpass Reply with quote

After reading many posts I have started to seal my crown preps prior to cementing the temp with Surpass 1,2,3. Other posts have also suggested using surpass prior to cementing the final crown. I am currently using clean & Boost surpass 1,2,3 and Unicem.

I am primarily using e max and zirconia crowns.

My Laboratory has a standard 0.020mm cement gap at the margin that transitions to a 0.070mm gap 1.25 mm up the axial wall.

I am concerned with the thickness of 2 coats of surpass on the tooth causing my crowns not to fully seat.

Are there suggestions or data on the ideal cement gap in my crowns using 2 coats of surpass.

Thank You
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dvaughan15



Joined: 24 Feb 2010
Posts: 5

PostPosted: Tue Aug 19, 2014 6:04 pm    Post subject: Reply with quote

Does no one else have a concern that 2 coats of surpass may cause seating issues with their crowns? This is my first post. I feel lonely.
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john kanca



Joined: 14 May 2005
Posts: 6345

PostPosted: Mon Aug 25, 2014 6:20 pm    Post subject: Reply with quote

I have placed countless PFM and ceramic crowns with two coats of Surpass without any sort of problem. If you are worried you can ask the lab to add a coat of die spacer but I never do.
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john kanca



Joined: 14 May 2005
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PostPosted: Mon Aug 25, 2014 6:21 pm    Post subject: Reply with quote

BTW, my recommendation is that you simply cement zirconia crowns with an RMGI such as UltraCem from Ultradent.
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dvaughan15



Joined: 24 Feb 2010
Posts: 5

PostPosted: Tue Aug 26, 2014 3:11 pm    Post subject: Reply with quote

John when you say "simply" cement with RMGI for zirconia do you mean not to seal the tooth prior with surpass and or not to place surpass before final cementation?
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john kanca



Joined: 14 May 2005
Posts: 6345

PostPosted: Wed Aug 27, 2014 3:05 pm    Post subject: Reply with quote

dvaughan15 wrote:
John when you say "simply" cement with RMGI for zirconia do you mean not to seal the tooth prior with surpass and or not to place surpass before final cementation?


Do go ahead and seal the tooth. But on delivery just sandblast the interior of the zirconia crown and use an RMGI to cement.
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