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Interface and Lava crowns
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tcstuart



Joined: 18 Mar 2009
Posts: 4

PostPosted: Wed Apr 22, 2009 9:00 am    Post subject: Interface and Lava crowns Reply with quote

No recent discussion of Interface and YZ cores. Anything new? Seems like sandblasting would be advised for a clean surface even if it does not otherwise increase bonding strengths.

Clay Stuart
Univ of KY 72
Danville KY
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john kanca



Joined: 14 May 2005
Posts: 6342

PostPosted: Wed Apr 22, 2009 9:48 am    Post subject: Reply with quote

For YZ I currently am recommending sandblasting followed by Surpass 2 and 3. We're looking at long term bond strengths; they're in storage now. The immediate results are great, and after a week they're still good. I need to see one month and five month data as well. It's coming.
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tcstuart



Joined: 18 Mar 2009
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PostPosted: Wed Apr 22, 2009 9:56 am    Post subject: Reply with quote

No Interface?
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tcstuart



Joined: 18 Mar 2009
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PostPosted: Wed Apr 22, 2009 10:05 am    Post subject: Reply with quote

Can Sim 2 be used instead of Surpass 2 and 3?
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john kanca



Joined: 14 May 2005
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PostPosted: Wed Apr 22, 2009 11:17 am    Post subject: Reply with quote

tcstuart wrote:
Can Sim 2 be used instead of Surpass 2 and 3?


I cannot tell you that Interface improves the bond to zirconia. Zirconia behaves more like a metal than a ceramic.
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jreth



Joined: 16 Jul 2008
Posts: 12

PostPosted: Mon Sep 30, 2013 1:10 pm    Post subject: Reply with quote

Long story short: Is there anything to worry about if I used Interface on a Zirc. crown? I realized it was a zirc core with stacked ceramic after I took the final X-ray on recementing a crown for a patient.
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john kanca



Joined: 14 May 2005
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PostPosted: Mon Sep 30, 2013 5:35 pm    Post subject: Reply with quote

jreth wrote:
Long story short: Is there anything to worry about if I used Interface on a Zirc. crown? I realized it was a zirc core with stacked ceramic after I took the final X-ray on recementing a crown for a patient.


Interface won't cause any problems.
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john kanca



Joined: 14 May 2005
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PostPosted: Mon Sep 30, 2013 5:37 pm    Post subject: Reply with quote

jreth wrote:
Long story short: Is there anything to worry about if I used Interface on a Zirc. crown? I realized it was a zirc core with stacked ceramic after I took the final X-ray on recementing a crown for a patient.


Interface won't cause any problems.
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jreth



Joined: 16 Jul 2008
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PostPosted: Mon Oct 07, 2013 6:42 am    Post subject: Reply with quote

john kanca wrote:
jreth wrote:
Long story short: Is there anything to worry about if I used Interface on a Zirc. crown? I realized it was a zirc core with stacked ceramic after I took the final X-ray on recementing a crown for a patient.


Interface won't cause any problems.


So just an update: didn't really cause a problem but the crown came completely off the core after 2 days. Patient and I were just glad it wasn't the post/core. Sandblasted and cemented w/ RMGI.

Cheers
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ilikecoffee



Joined: 02 Mar 2010
Posts: 119

PostPosted: Mon Oct 07, 2013 11:25 am    Post subject: Reply with quote

Anything that tests for cement bond strength to Zirconia should be made relative to those cemented with rely-X Unicem with the same protocol.
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john kanca



Joined: 14 May 2005
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PostPosted: Mon Oct 07, 2013 3:16 pm    Post subject: Reply with quote

ilikecoffee wrote:
Anything that tests for cement bond strength to Zirconia should be made relative to those cemented with rely-X Unicem with the same protocol.


Unicem? Why?
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ilikecoffee



Joined: 02 Mar 2010
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PostPosted: Tue Oct 08, 2013 11:31 am    Post subject: Reply with quote

U of Washington did a study that showed Rely X Unicem to be very adhesive to Zirconia (method of mix is important). It is the standard for most for because of the study...
We do a lot of zirconia crowns at our clinic (over 30,000 active patients at highly reduced costs) and have no cementation failures with the automix tip version. No clinical failures of full contour zirconia crowns yet either. It amazes me. We do have high quality control in regards to tooth preparation and impressions, but we had that with other materials with less successful results.
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john kanca



Joined: 14 May 2005
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PostPosted: Thu Oct 10, 2013 7:35 am    Post subject: Reply with quote

Is there a link for that?

I am hesitant to recommend Unicem after seeing the cement fail for me after several years. I will continue to recommend a standard RMGI as they have never failed me.

Thanks for the info.
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twmdds



Joined: 16 May 2006
Posts: 142

PostPosted: Thu Oct 10, 2013 9:45 am    Post subject: Reply with quote

Rely X Luting in the powder liquid form is simply too good - too consistant - too easy to switch away from. The cost is significantly less than the paste-paste formulas and who cares if it takes the assistant 15 secs longer to mix. It's just too good.
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ilikecoffee



Joined: 02 Mar 2010
Posts: 119

PostPosted: Thu Oct 10, 2013 10:43 am    Post subject: Reply with quote

RelyX Unicem 2 Automix is the exact product we use. I can't imagine a quicker easier product to use.
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