Bonding/cementing to existing crown

[BlakeHarting]

Hey, have you guys made a prosthesis to bond/cement to an existing porcelain tooth? If so what material and what cement/bond would you use?

 

[2thm8kr]

M@de some PMMA temps to bond over a existing FM rehab to try out the vertical and functional changes. Then did the final quadrants over time.
We used Multilink I believe.

 

[CatamountRob]

I made an emax veneer once to bond onto a chipped PFM bridge on an elderly patient. It worked just fine as far as I know.

 

[JohnWilson]

If the restoration can etch and the substrate can etch its easy.

e a bunch of pressed glass to put a bandaid on fractured PFMS over the years. The acid to etch the porcelain is not something most clients have in office I have used sent the stuff we etch EMAX with in the past but I believe its not suited for the mouth.

It becomes a bit more difficult when metal is exposed especially when you do not know the composition of the alloy. There are a ton of ways around building a bondable surface with either tin plating, metal priming, then opaquing with resin before you move forward but the absolute strongest bond is glass to glass rather than glass to resin.

I took a class with Ray Bertolottii from Danville years ago on adhesive dentistry, had very little to do with what I do on a daily basis but it got me thinking more like a chemist on what to suggest when **** went wrong.

 

[kimba]

I am pretty sure VOCO had a pfm repair kit , which was just composite with an etching material and a bonding agent.

 

[grantoz]

if anybody knows how to repair their old vmks its you kimba, dentist have had to repair heaps of yours haven't they.hehhehheh

 

[kimba]

if anybody knows how to repair their old vmks its you kimba, dentist have had to repair heaps of yours haven't they.hehhehheh

you are a very short man

 

[BlakeHarting]

I made an emax veneer once to bond onto a chipped PFM bridge on an elderly patient. It worked just fine as far as I know.

Did you etch the PFM? Or did you just go for it? And what bond did you use?

 

[CatamountRob]

Did you etch the PFM? Or did you just go for it? And what bond did you use?

It was etched, but I don't know what they used. The office uses Rely-X products but I don't know which one, this was years ago. They didn't ask me how me how to etch or bond it, they just asked if I could me if I could make it.

 

[doug]

Sometimes a need-to-know basis is the best for all involved

 

[sndmn2]

..my Docs usually just prep them down to the metal and I make a pfm to go over it.... I'm talking bridges..