Crown Bottoms over Ti Bases

[Affinity]

and no! dont change the shrinkage factor, that will shrink the whole crown. Just the internal reduction value he said.

 

[tyjthomas]

correct - don’t change the shrinkage factor, just internal cavity fit. Checking your fit settings, like bur compensation is a good idea too. Our smallest bur is .6 so 1.2 can be a little more than is sometimes needed. Also remember with zirconia it gets scaled up 1.2xxx amount between designing and milling. Technically the bur compensation could thus be scaled down a little. That’s more theoretical than what I do but may be with some thought…

I had to go about making these adjustments in millbox because the implant library locked me out of adjusting the fit parameters in Exocad. .

 

[Affinity]

The .6mm bur typically doesnt get used internally unless its a flat tool. Not sure about the strategy for millbox though. In hyperdent and vhf its only sending the 1mm too for channel finish milling.

 

[CoolHandLuke]

Our smallest bur is .6 so 1.2 can be a little more than is sometimes needed.

you'd be correct, unless your template or strategy instructs the 0.6mm tool to finish the surface. if not, if it is finished by 1mm and only restmachined or spot-finished by 0.6mm, then 1.2mm leaves enough for tool deflection and debris removal. never match this 1:1 you always need room for the tool to do work and not get bound up like a drill bit.

 

[sidesh0wb0b]

id like to pay one of you exocad whiz kids to come down here and tweak all my settings lol. not only are all of you smarter than i am, but i dont have time.

 

[tyjthomas]

Thanks all for the correction. Haven’t experimented enough and seems like the new edition of Millbox may allow for more precise milling strategy…but haven’t really had enough free time to check it all out.

@sidesh0wb0b - I’m with you. I‘m just a doc and need my own wiz to help run my show! https://dentallabnetwork.com/forums/threads/prosthodontist-seeking-high-level-technician.33070/

 

[sidesh0wb0b]

Thanks all for the correction. Haven’t experimented enough and seems like the new edition of Millbox may allow for more precise milling strategy…but haven’t really had enough free time to check it all out.

@sidesh0wb0b - I’m with you. I‘m just a doc and need my own wiz to help run my show! https://dentallabnetwork.com/forums/threads/prosthodontist-seeking-high-level-technician.33070/

i dont use millbox, stuck with sum3d and have no issues with it. but the majority of the settings discussed here should be changed in the design phase (exocad),not in the nesting phase (millbox/sum3d)

 

[tyjthomas]

i dont use millbox, stuck with sum3d and have no issues with it. but the majority of the settings discussed here should be changed in the design phase (exocad),not in the nesting phase (millbox/sum3d)

Couldn’t agree more! Only time I have had to change it in nesting software is when I’m using a locked-down implant library (aka Straumann) that doesn’t allow me to change the parameters. So annoying!