Hi there and thanks for the response. I'm not a technician as I run the business side for us but I will relay to you what I can. We have 3shape scanners (2xE4 and 1xD2000) and we mill predominantly on 2x imes icore 350i Pro+ w/loaders. Sintering in Shenpaz furnaces. It seems that most of our issues are mainly on screw-retained implant cases with long spans. We end up with lots of internal remakes because the bridges just don't fit correctly by rocking on the model. Additionally, we had one case we just got done milling for the 4th time (yes, you read that right) were one of 6 implants was just "way up in the air."We can help if you give more info.. What materials and machine are you using? What fit issues? What scanner? Are we talking horseshoe bridges?
I cant say Ive ever had a bridge that didnt fit since I started doing cad cam.. Are you casting these bridges?
Lots of things can be going on, but I would start here. Are you sintering your frameworks like this? I learned this from John Wilson and we don't have warping issues from sintering.
Now, this is interesting. We are definitely NOT doing this.
I highly doubt your scanner is the issue(make sure its calibrated). If your mill is doing single unit cases, then it's probably not the issue either. I would definitely call your mill tech support and have them look at your milling strategy for your long span bridges and make sure there isn't something goin on there. Sintering is the most likely cause of poor fits on these long span cases. I don't know anything about your type of sintering oven(we use Ivoclars S1),but sintering the bridge vertically and supporting it like in the picture, is definitely the way to go.
lots to learn here that will benefit you. if youre not supporting bridges properly during sintering that could easily be the culprit and we just saved you thousands. fingers crossed!
Great responds so far, especially from Bret!
Doesn’t sound like much of a vacation
