IOS Verification Jig

[Labslip]

What are you folks currently using for verification jigs from an inter-oral scan? Most of our implant work is done from traditional impressions (at our request) and we make a jig on the stone model. It seems to me that the weakest link in the IOS is the printed analog model. I don't want to start with an accurate IOS and make an inaccurate model and make my jig from that.
I've searched past posts for clues but haven't found anything definitive. What's the current thinking?

 

[Brett Hansen CDT]

What are you folks currently using for verification jigs from an inter-oral scan? Most of our implant work is done from traditional impressions (at our request) and we make a jig on the stone model. It seems to me that the weakest link in the IOS is the printed analog model. I don't want to start with an accurate IOS and make an inaccurate model and make my jig from that.
I've searched past posts for clues but haven't found anything definitive. What's the current thinking?

Is this for an All on X case? For those cases, I know you need to use some special scanning tools(Programmetry?) in order to scan them accurately.

 

[Labslip]

It is not an All on X. It will be 7-units C&B on 4 implants.

 

[Brett Hansen CDT]

It is not an All on X. It will be 7-units C&B on 4 implants.

IMO doing a model verification jig will incorporate more error than just going with their scan for the reasons you stated. If you had any issues with meshing the virtual scan bodies into the scan, then I would ask for a new scan or an analog impression.

 

[Labslip]

That's what I was hoping to hear. The scan is clean and clear.

 

[grantoz]

you dont need a special scanner most of my full arch implant bridges are scanned using their normal IOS trios medit itero you just need good quality scan bodies and a good operator its better to use metal scan bodies that have a white surface baked on .the zirkonzahn ones are like that but they're others and also use 6 scan bodies if you have 6 implants .you can just mill a simple metal bar to verify the scan if you like.

 

[rookiee]

That's what I was hoping to hear. The scan is clean and clear.

That doesn't mean it precise, trust me, been there done that. With my docs we go analog way in those cases, period. Not saying can't be done but they can't do it and I won't be a test bunny on my expenses anymore.

 

[Labslip]

Yeah, this is what I was expecting to hear. We do single unit implant cases from an IOS sometimes without trouble, but I'm really uncomfortable with a large restoration.
Thanks for the responses. Anybody else care to chime in?

 

[a3dl]

print models and fab a verification jig from printed models. Expect the account to section and lute and pick up in custom tray.

 

[Andrew Priddy]

print models and fab a verification jig from printed models. Expect the account to section and lute and pick up in custom tray.

print a bar and section it... print your model with the analog seats opened up and lute your analogs in with the verified bar screwed in.
fabricating a jig on an inaccurate model is a wasted step and time

 

[Labslip]

print a bar and section it... print your model with the analog seats opened up and lute your analogs in with the verified bar screwed in.

That will ensure that the analogs are correctly positioned in relation to one another. If I open up all the analog seats, how do I ensure that the whole assembly is accurate to the arch?

 

[Andrew Priddy]

open up your horizontal axis slightly, but it depends on analog design
if your scan body positioning is off, your "correct analog" position will be off.
the analogs will realign position slightly with the verified bar. lute the analogs in with model resin to lock in their position

That will ensure that the analogs are correctly positioned in relation to one another. If I open up all the analog seats, how do I ensure that the whole assembly is accurate to the arch?

the whole assembly will be accurate, and it shouldn't be far off to start with

 

[Labslip]

Really helpful. Thanks everyone for your replies.

 

[grantoz]

we mill a simple bar with try in on top and verify everything the fit the bite the easthetics. Its very rare these days that a ios for a full arch doesnt fit and thats with standard scan bodies and standard io scanner.

 

[Contraluz]

print a bar and section it... print your model with the analog seats opened up and lute your analogs in with the verified bar screwed in.
fabricating a jig on an inaccurate model is a wasted step and time

Interesting concept. I am struggling to get 'passive' implant models printed. Most models don't relate to a verification jig.

If I understand correctly, you virtually design an implant bar on the IO scan (on temp cylinders I presume?) print it, cement it onto the temp cylinders, section it and send it to your client. Is that correct, so far? What material are you using, when you print the bar? No models printed so far?

Once verified, you then print a model with enough 'wiggle room' so the luted bar, with the attached analogs, fits passively in/on it. I imagine you then fix the analogs with pattern resin, or so, in the model.

Do you use a jig to position the bar in relation to the remaining teeth?

we mill a simple bar with try in on top and verify everything the fit the bite the easthetics. Its very rare these days that a ios for a full arch doesnt fit and thats with standard scan bodies and standard io scanner.

Is that for hybrids, or also for a potential Zr restoration? The bar is milled out of Ti?

Thanks in advance!

M

 

[ANoobTech]

Is this for an All on X case? For those cases, I know you need to use some special scanning tools(Programmetry?) in order to scan them accurately.

Yeah a photogrammetry camera. The clinic connected to me uses one. If I understand correctly, they're used to get the implant location

 

[grantoz]

Yeah a photogrammetry camera. The clinic connected to me uses one. If I understand correctly, they're used to get the implant location

you dont need a special scanner just a dentist who knows how to scan ive got guys using trio3s no problems at all

 

[grantoz]

Interesting concept. I am struggling to get 'passive' implant models printed. Most models don't relate to a verification jig.

If I understand correctly, you virtually design an implant bar on the IO scan (on temp cylinders I presume?) print it, cement it onto the temp cylinders, section it and send it to your client. Is that correct, so far? What material are you using, when you print the bar? No models printed so far?

Once verified, you then print a model with enough 'wiggle room' so the luted bar, with the attached analogs, fits passively in/on it. I imagine you then fix the analogs with pattern resin, or so, in the model.

Do you use a jig to position the bar in relation to the remaining teeth?


Is that for hybrids, or also for a potential Zr restoration? The bar is milled out of Ti?

Thanks in advance!

M

cocr ti what ever is in the mills i use this for for hybrids zr any full arch im more worried about the bite than the fit as my guys know how to scan.i mill direct to fixture or multi unit abutments it doesnt matter what mills do you use i use zirkonzahn