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zamboni
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Having problems with teeth coming out, using bonding agent, mechanical retention, mostly vita teeth.Not sure what else to do?
I had the same problem for a while, and it seemed to happen with either Ivocap or conventional (I use Fricke Hi-I Special fiber "T" = a beautiful resin!). I was roughening the teeth to break the glaze and still had the problem, and I was rubbing them with monomer (I tried both self-cure and heat cure) before processing. Still had some problems.
The thing that cured it for me, and I haven't had a problem since, is to paint, with a brush, the separator taking care to NEVER get any on the teeth, and then I swab (with a Q-tip) all surfaces of the exposed teeth with ACETONE that I got from the local hardware store, and rub in different directions until they squeek.
On occation, I've popped each individual tooth out of the counter-die (I use Flexistone over the teeth prior to investing),held them with fancy hemostats and steam cleaned them. I'll still use the acetone on the underside of the teeth and then a dot of superglue on the buccal cusp when putting them back to keep them from "floating" during processing (which I've had happen with the Ivocap a half-a-dozen times).
It also seems the fancier, premium Double-Cross-Linked teeth are less porous and less prone to bond with the denture base. It seems like I have to be a lot more anal-retentive today than I had to be back using cheap-ass New-Hue teeth and Lucitone 199.
Does anyone have any recommendations to a boilout tank they like?
The Nevin 5400 Electric Washout System works very nice. It is sold through dealers (Harris Discount Supply, Lincoln). Below is a description I cut & pasted from their website:
"5400 Electric Washout and Cure system uses touch pad on the face of the unit to program start times, finish times and length of time for the curing cycle. The 5400 Electric Washout and Cure System accommodates 6 flask halves for washout and 12 clamped flasks for curing. It requires 220V single phase electrical current and the program remains in memory even if the power is interrupted. The Electric Washout and Cure System is constructed of stainless steel and no venting is needed for benchtop use".
Does anyone have any recommendations to a boilout tank they like?
The Nevin 5400 Electric Washout System works very nice. It is sold through dealers (Harris Discount Supply, Lincoln). Below is a description I cut & pasted from their website:
"5400 Electric Washout and Cure system uses touch pad on the face of the unit to program start times, finish times and length of time for the curing cycle. The 5400 Electric Washout and Cure System accommodates 6 flask halves for washout and 12 clamped flasks for curing. It requires 220V single phase electrical current and the program remains in memory even if the power is interrupted. The Electric Washout and Cure System is constructed of stainless steel and no venting is needed for benchtop use".
I have had this unit for over 15 years and have moved it to 3 different locations and its now in its final resting place. Its a solid machine and I would recommend it highly.
For Lucitone 199 acrylic resin, the highest failure loads resulted when the ridge lap was left with an intact glaze and did not have a diatoric, with no significant influence from the use of monomer. For Ivocap resin, the highest failure loads resulted when the ridge lap had a diatoric but did not have monomer placed, with no significant influence from glaze.