cementation techniques

Hitdabox

Hitdabox

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Hi all,

I wanted to know how you go about your cementation of implant retained zirconia restorations. I have my cement and bonding dialed but its the actual cementing that I feel could be easier with less back and forth. I am currently using a solid implant cast and cement directly on the cast which is fine but the more units with various draw angles poses difficulty when cementing with adjacent teeth etc, and if I just do one at a time, I get a slight differentiation when cementing the other abutment which ends up making me need to start over and its a serious pain. As you know, the only way to really start over is run the prosthesis in the oven again and burn out the cement and do it again... which I hate to do.

So a couple things.

What is your technique to make this more straight forward?
(Should I use an additional model with no tissue or adjacent teeth and do them that way? I've always chickened on that because I didn't want to buy more analogs but at this point it really seems best.)

If you need to make any change like a slight glaze or add on, is there a way to do it without running it up in the oven and breaking the cement bond? For this reason - I like UCLA PFG but it costs so much more. idk

Appreciate your insight and tips.

Thanks!
 
Contraluz

Contraluz

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It is a PITA...

If I have divergent angles, I do one by one or two/three at a time, if they are of the same angle. Make sure everything fits passively, before you start the process. I always make sure everything is screwed down, even the ones I am not cementing. And when cementing the next batch, I screw down the ones I have cemented already. It is a tedious process and takes up a lot of time.

Or, make sure all your abutments are of the same path of insertion... I know that is not always possible, especially if you have a full arch.
 
Hitdabox

Hitdabox

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Thanks! So always on the cast but only cement a couple at a time just confirming the rest seat as well. Do you use the same cast?
 
Contraluz

Contraluz

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Ideally, you would have a cast/model made from a verification jig. I aways cemente them on the model, be it individual crown or bridge.
 
Brett Hansen CDT

Brett Hansen CDT

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For cases where the insertion directions are not parallel or where the neighboring teeth contacts will cause issues with the insertion of the implant restorations, i make a decision during design on which unit/units need to be delivered first and I write that on the model. Typically, i have them deliver the most problematic unit first. Then I design the proximal contact of that unit to be parallel with the insertion direction of the proximal implant restoration. Once I get my view set up in 3 shape so I am parallel with the insertion direction of the neighboring implant, I use the plane cut tool on the proximal contact area.
 

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