SNAP provisionals

[Doc Smile]

---

Members don't see this ad.

Any advice on using SNAP to make a provisional? we are making one for a FGC on #15 and I cannot get a good provisional. When I am pulling it, sometimes it is too rubbery still and well deform when i take it off the tooth. Other times it has shrunk to much and wont budge from the tooth. other times it is a perfect consistency but doesn't have a good margin. . . .

More info: I am using an exoflex external form of the ideal non-prepped tooth that i am putting the SNAP into then setting it on the tooth. I vasolined all the areas that the faculty told us to in the ppt. I am using a ball of snap im playing with in my fingers to gauge when to pull the tooth.

 

[Contach]

Sulfa Nocardia Actinomyces Penicillin

Sorry, that's all I think about these days when someone says 'snap'

 

[mamelons]

Any advice on using SNAP to make a provisional? we are making one for a FGC on #15 and I cannot get a good provisional. When I am pulling it, sometimes it is too rubbery still and well deform when i take it off the tooth. Other times it has shrunk to much and wont budge from the tooth. other times it is a perfect consistency but doesn't have a good margin. . . .

More info: I am using an exoflex external form of the ideal non-prepped tooth that i am putting the SNAP into then setting it on the tooth. I vasolined all the areas that the faculty told us to in the ppt. I am using a ball of snap im playing with in my fingers to gauge when to pull the tooth.

My guess is when the material is still rubbery, you are not letting it set long enough, and when the provisional won't budge from the tooth, you probably have an undercut somewhere. Even the smallest undercut is not very forgiving, especially with a brittle material like SNAP or Integrity and similar products, and even moreso on gold crown preps since you have minimal tooth preparation. With a brittle material and minimal tooth preparation in comparison to a PFM crown prep, trying to take a provisional off with any sort of undercut will almost inevitably cause it to break because there is not a bulk of material on gold crown prep like there is for a PFM. So, my advice is take another look at your crown prep-- critically evaluate your work and make sure there are no undercuts anywhere, and then the provision should be able to pop right off with little effort. Good luck.

 

[browncrack]

My guess is that you won't be using snap after you are done with pre-clinic. However, you can place a thin layer of vaseline on the prep, excluding the margins, and it should come off pretty easily.

 

[mike3kgt]

Ethyl methacrylates (SNAP,Trim) are excellent materials for provisional restorations. Get good at them and you'll do very well in practice if you start getting into larger cases. Bis-acryls (Integrity, Protemp) are great so long as you are doing single units or anteriors.

The better you get at handling methacrylate materials like SNAP (ethyl), Jet & Alike (methyl) you'll be better at larger fixed procedures and removable procedures (soft liners are typically ethyl methacrylates and denture base resins are typically methyl methacrylates).

Not discarding these materials quickly will improve your dentistry as a whole. Practice and practice over and over again and you'll get it. Check your prep clearance and undercuts (#1 problem with the materials).

Good luck!👍

 

[Doc Smile]

No undercuts and a thin layer of vaseline applied.

For me, it just was a matter of timing. I wait 5 minutes, take it off (or out of the Exoflex external form), trim the excess for a few seconds, put it back on, wait a minute, take it off, trim trim.

I got it tow work fine today.

Thank you for the advice!

 

[DrJeff]

Any advice on using SNAP to make a provisional?

Yup, Don't!!! 😉

 

[Doc Smile]

Yup, Don't!!! 😉

I wish I had that option! But we gotta learn how to work with each material . . .

 

[HupHolland]

It can also be getting stuck in embrasure undercuts on adjacent teeth. Once the material gets to the point it can be taken off the tooth without permanently deforming the crown, but not hard yet, gently remove the provisional from the tooth and quickly trim the excess from the embrasure undercuts. I found this to help a lot.

Also, these provisionals will almost always have to be bead-n-brushed, in my hands at least. I found it helpful is use a very doughy consistency of acrylic when making the temp.

Like Mike said, getting good with these materials will definitely improve your dentistry in general.

Also, try making a temp free hand using the block technique. This will become soooo useful in real practice when pt's come in with a prepped tooth and no temp!

Hup

 

[DrJeff]

Also, try making a temp free hand using the block technique. This will become soooo useful in real practice when pt's come in with a prepped tooth and no temp!

Hup

How I handle this situation.

#1, quickly mock up, using my regular posterior composite (usually in a shade that I have, but almost never use, such as C4) on the unetched tooth with NO bonding agent. Quickly light cure. This all takes me about 2minutes, tops.

#2 as soon as I'm done curing my mock up, I take a quick impression of the mocked up tooth using either a quadrant or sextant tray with quick setting PVS heavy body. This takes 2 minutes from that start of the mixing of the PVS to full set.

#3 as soon as that impression material is set, I load the impression of that tooth I mocked up with a autopolmerizing Bis-GMA resin temp material. This take just under 2 minutes from the start of the dispensing until it has set

#4 - finish/polish/adjust the occlussion of the temp and cement with your favorite temporary cement - 3 minutes tops.

In less than 10 minutes, that tooth that just walked in ready for a crown, but lacking something covering its dentin, I've got that temp made and that patient back together 😎

 

[malloyevelyn110]

how did I miss this thread? Like it

 

[HupHolland]

How I handle this situation.

#1, quickly mock up, using my regular posterior composite (usually in a shade that I have, but almost never use, such as C4) on the unetched tooth with NO bonding agent. Quickly light cure. This all takes me about 2minutes, tops.

#2 as soon as I'm done curing my mock up, I take a quick impression of the mocked up tooth using either a quadrant or sextant tray with quick setting PVS heavy body. This takes 2 minutes from that start of the mixing of the PVS to full set.

#3 as soon as that impression material is set, I load the impression of that tooth I mocked up with a autopolmerizing Bis-GMA resin temp material. This take just under 2 minutes from the start of the dispensing until it has set

#4 - finish/polish/adjust the occlussion of the temp and cement with your favorite temporary cement - 3 minutes tops.

In less than 10 minutes, that tooth that just walked in ready for a crown, but lacking something covering its dentin, I've got that temp made and that patient back together 😎

Thanks for the tip, Dr. I never thought of doing this. Seems quick and easy...

Hup

 

[Althingsdentist]

Based on this thread, I wanted to put together a 3 part series regarding provisionals using 3 different types of materials. I'm prepping for an anterior FDP (e.max) for an inhouse lab tech to practice pressing lithium disilicate. I will film that as well.

1. Old school MMA/PEMA - I used Jet provisonal material (similar handling to SNAP) - this video is completed. - I break the 3 unit FDP and show how I manage to fix it without starting over - starting over can be much faster.

2. Bisacryl - next provisional material to be filmed. This is what we all use in the real world.

3. Radica - this is a great material (UDMA) that can serve as a long term provisional - for example - soldiers deploying. The last to be filmed.

Please let me know if this helps,

Ashley


http://www.youtube.com/playlist?list=PL66C5C4F3B3A48353

 

[browncrack]

place a stainless steel crown onto the prepped tooth with blue moose, approximate occlusion. take bite with blue moose of the stainless steel crown. Use bis-gma to make temporary and adjust bite. throw away/autoclave stainless steel crown.

 

[DrJeff]

place a stainless steel crown onto the prepped tooth with blue moose, approximate occlusion. take bite with blue moose of the stainless steel crown. Use bis-gma to make temporary and adjust bite. throw away/autoclave stainless steel crown.

You might just be suprised at how FEW GP offices actually have stainless steel crowns these days

 

[Althingsdentist]

DrJeff - I agree. Not many stainless steel crowns floating around. A British Prosthodontist (who worked next to me in Belgium) taught me to use SSC with IRM - really easy to use. It's like IRM will stick to anything.

I have some footage of this technique with a really old school implant abutment that I couldn't remove, so I temp'd it with this technique.

Let me know if anyone cares to view it and I"ll post it.

Cheers

Ashley

 

[teh dentist]

My experience with SNAP is that it is toooo brittle. Breaks so easily.

Try making an initial squash with JET, then go back and reline it with SNAP for sexy margins.

If its getting "stuck", its cause u have undercuts. If you swear there are no undercut, then add some dilube or vaseline to the prep. If its mushy, then let it set longer. SNAP isn't as exothermic as JET, so you can leave it on the gingiva longer than JET without injuring it.

gluk