JMN
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I don't fabricate new dentures in my lab, I have enough headaches.
What I like to do is fix things. Sometimes I get things that shouldn't have happened.
Some people need a nudge to start thinking about problem solving methods, and so this is another thing that will eventually go into my tech training manual, and it's a bit rough, sorry.
This case had a denture base thickness in the .8-1.7mm range across the entire palatal region. It was less than a year old, had cracked 2x and had broken in 2pcs when I got it this time. Doctor decided it was time to do something more long lasting. But mesh was out. And it didn't need a reline. Occlusion was verified at the appointment the patient presented with the first crack in the denture since it was so new.
So I "relined" the lingual side.
Sheet of wax ( @rc75 new color is much nicer, thanks) warmed and pressed home over the teeth and totally in contact with the pink acrylic and cut flush with the distal.
and blended as it wraps around to the buccal
Now the fun part. This has to 'rhyme' with the previous techs work, so follow along as much as possible with that festooning and flame gently-trying to keep the teeth clean. Whatever is wax will be replaced with acrylic.
And it still looks like freeze dried poop...(don't ask)
Well, they guy paid for a decent denture (probably),let's see if we can make this one.
I have box of those Keystone nifty palate wax patterns. Hmm...
Warm it up gently and press it home. Yeah, it'll probably get a few air bubbles, use a scalpel to release them or just leave some of them as nothing perfect looks real- your call.
Cut along the distal again, adjust the festooning again and use Ralph before very gently flaming to merge layers at the teeth.
Oh, here's Ralph. His bristles have been on things that'd make me puke. So Ralph.
(he gets cavicide-ed A LOT)
Mix putty of your choice and press home on the entire "outside" of the denture. Be certain to get it packed into the teeth, around the blend line and over the distal to keep the postdam. Verify there are no teeth poking through or weak spots, if there are, mix a bit more and overlay it. Putty sticks very well to itself if no separator is used.
Gently wiggle the denture free of the matrix and remove the completely by the method of your choice.
I sing old TV show themes till it runs away of it's own accord. Flip the matrix 'occlusal up' so nothing gets in it.
Prepare/grind and roughen the entire area the wax covered including around to the buccal at the merge point, but not the periferal roll, and especially not the distal edge, only the lingual of it. This is not a reline. Don't want to move the palatal seal at all.
Make sprue holes per IFU. Mix and apply/Pour/Inject material per IFU.
This is where knowing your materials comes into things. Get accustomed to them, learn them, take them out to dinner and have a chat. I've been using the same material so long that I know how it behaves, what it will do when and how it will react at what time. I know I can mix it at the proper ratios, pour it into a Monoject 412 syringe (with the tip cut shorter) and squirt it in if I do it fast and with minimal added hand warmth. This material is not marketed as a pour PMMA either.
412s do not have a luer lock, and will not accept a needle of any type, no legal issues anywhere, ever.
Used also to feed some baby animals.
https://www.amazon.com/Syringe-Only-12mL-Curved-Monoject/dp/B01IO8U7UC/
Cure at the temp indicated, under the pressure indicated, for the time indicated.
Break out of putty and see how big a mess you have made
Remove sprues, blend thicknesses at join points, polish, QC.
Finished and ready for sanitization. Join points imperceptible but by shade change. Shade change was made "slow" by having a gradually thickening layer of wax at those spots until it becomes entirely the 'new' color.
Bill, and Grin.
Edit: I was explicitly not authorized to modify the buccal thinness that is noticeable in the images.
What I like to do is fix things. Sometimes I get things that shouldn't have happened.
Some people need a nudge to start thinking about problem solving methods, and so this is another thing that will eventually go into my tech training manual, and it's a bit rough, sorry.
This case had a denture base thickness in the .8-1.7mm range across the entire palatal region. It was less than a year old, had cracked 2x and had broken in 2pcs when I got it this time. Doctor decided it was time to do something more long lasting. But mesh was out. And it didn't need a reline. Occlusion was verified at the appointment the patient presented with the first crack in the denture since it was so new.
So I "relined" the lingual side.
Sheet of wax ( @rc75 new color is much nicer, thanks) warmed and pressed home over the teeth and totally in contact with the pink acrylic and cut flush with the distal.
and blended as it wraps around to the buccal
Now the fun part. This has to 'rhyme' with the previous techs work, so follow along as much as possible with that festooning and flame gently-trying to keep the teeth clean. Whatever is wax will be replaced with acrylic.
And it still looks like freeze dried poop...(don't ask)
Well, they guy paid for a decent denture (probably),let's see if we can make this one.
I have box of those Keystone nifty palate wax patterns. Hmm...
Warm it up gently and press it home. Yeah, it'll probably get a few air bubbles, use a scalpel to release them or just leave some of them as nothing perfect looks real- your call.
Cut along the distal again, adjust the festooning again and use Ralph before very gently flaming to merge layers at the teeth.
Oh, here's Ralph. His bristles have been on things that'd make me puke. So Ralph.
(he gets cavicide-ed A LOT)
Mix putty of your choice and press home on the entire "outside" of the denture. Be certain to get it packed into the teeth, around the blend line and over the distal to keep the postdam. Verify there are no teeth poking through or weak spots, if there are, mix a bit more and overlay it. Putty sticks very well to itself if no separator is used.
Gently wiggle the denture free of the matrix and remove the completely by the method of your choice.
I sing old TV show themes till it runs away of it's own accord. Flip the matrix 'occlusal up' so nothing gets in it.
Prepare/grind and roughen the entire area the wax covered including around to the buccal at the merge point, but not the periferal roll, and especially not the distal edge, only the lingual of it. This is not a reline. Don't want to move the palatal seal at all.
Make sprue holes per IFU. Mix and apply/Pour/Inject material per IFU.
This is where knowing your materials comes into things. Get accustomed to them, learn them, take them out to dinner and have a chat. I've been using the same material so long that I know how it behaves, what it will do when and how it will react at what time. I know I can mix it at the proper ratios, pour it into a Monoject 412 syringe (with the tip cut shorter) and squirt it in if I do it fast and with minimal added hand warmth. This material is not marketed as a pour PMMA either.
412s do not have a luer lock, and will not accept a needle of any type, no legal issues anywhere, ever.
Used also to feed some baby animals.
https://www.amazon.com/Syringe-Only-12mL-Curved-Monoject/dp/B01IO8U7UC/
Cure at the temp indicated, under the pressure indicated, for the time indicated.
Break out of putty and see how big a mess you have made
Remove sprues, blend thicknesses at join points, polish, QC.
Finished and ready for sanitization. Join points imperceptible but by shade change. Shade change was made "slow" by having a gradually thickening layer of wax at those spots until it becomes entirely the 'new' color.
Bill, and Grin.
Edit: I was explicitly not authorized to modify the buccal thinness that is noticeable in the images.
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