Saluki
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Need some help with bonding multi unit inserts to pmma temp have tried rely-x but it only sticks to metal caps. Comes apart when screw down temp .
I just use an appropriate size tapping tool, takes 30 seconds...What I have been working on is to automate this process in CAM with a Thread cutting tool and I almost have it dialed in perfect on my PM7
I assume you are doing it by hand?I just use an appropriate size tapping tool, takes 30 seconds...
Jig mounted on the paralleling mill , screw channel centers the crown under the tool which can only move vertically ... no monkeying as one might assumeI assume you are doing it by hand?
Patrick. I tried to call Ivo. today but closed. I have been using Multilink Automix for bonding my zirc to ti abutments. What kind of working time do I actually have on the bench ? Thanks.You still need to prep the PMMA before cementing. I recommend lightly sandblasting with 100micron ALOX, then clean with compressed air (no water or steam),apply a bonding agent like SR Connect (Ivoclar) according to manufacturer's directions (for SR Connect you apply let set for 60 seconds then light cure),and finally cement with your resin cement (I prefer Multilink Hybrid Abutment Cement (Ivoclar).
Of course you still need to treat the temp sleeves or Ti bases, by sandblasting and using a metal bonder (Monobond + [Ivoclar]) before cementation as well.
We have stopped using anything except two part acrylic on long term immediate temps. Add some mechanical retentionTo add to Patrick's and John's suggestions, I actually 'glue' them in with Telio Lab (well, as long as it last...),which is a powder/liquid acrylic. I do sandblast the inserts, but no monobond. I have done some long term, full arch provisionals and they hold up well.
So, what I have been doing is adding a pinch of Telio powder opaquer, to counter the greyness.I avoid blasting the copings since it makes the temps look a bit grey