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DeBonds...??

 
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jasonl



Joined: 25 Aug 2005
Posts: 272
Location: Florida

PostPosted: Tue Jun 26, 2007 9:55 am    Post subject: DeBonds...?? Reply with quote

2 posterior onlays and 1 veneer in the last week have debonded.

The veneeer may be due to a dogs forehead and I have not seen the patient yet so I can't comment further.

The 2 onlays really stump me. The anchor was firmly attached to the onlay and the tooth looks pristine.

I suspect the tooth was contaminated during bonding but even that feels unlikely to me....but I'm not perfect so it's possible.

my procedure:
interface porcelain
Hydrogen peroxide scrub on tooth
rinse and dry
sim 1 - agitate
sim 2 on porcelain and tooth - multiple applications
air to thin
cure 10 seconds each (G Light)
sim 2 re-applied to tooth
air but no light cure
anchor placed on porcelain and tooth
restoration placed
held in place for about 90 seconds
excess material removed
floss
cure B, L, O for 10 seconds each

am I doing anything wrong?
what can I change/improve?

Thanks!!
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Jason Luchtefeld, DMD, FAGD
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Ekrause



Joined: 11 May 2005
Posts: 782
Location: I'm here now.

PostPosted: Tue Jun 26, 2007 11:42 am    Post subject: Reply with quote

Peroxide??
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No, Donny, these men are nihilists, there's nothing to be afraid of....
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jasonl



Joined: 25 Aug 2005
Posts: 272
Location: Florida

PostPosted: Tue Jun 26, 2007 1:16 pm    Post subject: Reply with quote

is that a bad thing?

I like how it bubbles....
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Jason Luchtefeld, DMD, FAGD
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Ekrause



Joined: 11 May 2005
Posts: 782
Location: I'm here now.

PostPosted: Tue Jun 26, 2007 2:27 pm    Post subject: Reply with quote

releases oxygen *(ie the bubbles)*

may inhibit bonding

Use Isopropyl alcohol
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Mark J Fleming DDS



Joined: 11 May 2005
Posts: 736
Location: Sarasota, FL

PostPosted: Tue Jun 26, 2007 2:32 pm    Post subject: Reply with quote

Ekrause wrote:
releases oxygen *(ie the bubbles)*

may inhibit bonding

Use Isopropyl alcohol


Agree, nix the peroxide. Cool
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john kanca



Joined: 14 May 2005
Posts: 6346

PostPosted: Tue Jun 26, 2007 6:36 pm    Post subject: Reply with quote

I agree about the peroxide

AND

treat the tooth and the porcelain separately.

I suspect there's a problem with trying to do both at the same time.

Where did we recommend peroxide?

If you like bubbles, go with champagne instead. Cool
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jasonl



Joined: 25 Aug 2005
Posts: 272
Location: Florida

PostPosted: Wed Jun 27, 2007 6:23 am    Post subject: Reply with quote

done.

I'll use the excess peroxide with my zoom light.

by treating separately do you mean treat the porcelain with interface and sim 2 before proceeding with with step 1 on the tooth?
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Jason Luchtefeld, DMD, FAGD
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john kanca



Joined: 14 May 2005
Posts: 6346

PostPosted: Wed Jun 27, 2007 7:11 am    Post subject: Reply with quote

It's what I do. Sometimes trying to do too many things at once causes trouble.
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