Thursday, July 06, 2006

Nobel Guide Protocols

Which protocols do you use to scan for Nobel Guide ?
Do they have a recommended dicom size file ?
or maybe a recommended matrix size ?
Maybe other tips for Nobel ?
Thanks Amnon


Blogger Colleen Stauts said...

We use a .4 vox with the 6cm or 8cm limited view scan of either the maxilla or mandiblewith the guide and occlusal biting guide in place. Line the occlusal plane parallel to the horizontal laser line. Take the second scan (of the guide--without the occlusal biting guide) the same way (and plane) as the first. Use Dicom Multi for both scans for the lab. We've only done a couple of these, but have had no complaints!! Good luck!

5:23 PM  
Blogger Amnon said...

What do you use as occlusal biting guide ?
If you have to take both jaws do you take one scan ?

9:19 PM  
Blogger Craig Dial said...

You need to do a separate scan for each arch. If I understand the Nobel software, the program cannot process both arches, so then you will have to do a total of 4 scans (if you are doing two arches) 1 scan with the appliance in, and a second scan of just the appliance only. We then export in DICOM multi file.

7:40 AM  
Blogger Craig Dial said...

“What do you use as occlusal biting guide?”

We use some wafer wax to separate the teeth, but you can use anything that does not appear in the image like a Styrofoam bite block or a few bite wing tabs.

7:42 AM  
Blogger Colleen Stauts said...

In the NobelBiocare manual and course, the referring dentist makes a radiographic guide and a "radiographic index" (or bite registration as we call in dentistry) so the teeth are in correct occlusion when the patient is wearing the guide for the scan. The bite registration is made of putty that hardens for the indentation of the teeth in correct occlusion, or biting relationship, and the dentist should supply this with the guide. This is used in the first scan. The second scan is only the radiographic guide. Craig is correct that four scans are taken for both arches, but according to the NobelBiocare information, the patient bites down during the scan. I think the only time you need foam is if the patient is edentulous (I would think I would use an opposing denture for the stability of the bite registration, but we haven't done one yet).

6:14 PM  
Blogger Matt Kroona said...

I have only done a handfull of these but my understanding is that you only need to do 2 scans - one full scan of the patient with the guide in place and one of the guide only. I do not believe you need to do an upper AND lower scan. I believe that Simplant requires seperate upper and lower scans but I'm reasonably sure that Nobel does not. Maybe someone who attended the spring seminar at Nobel in Yorba Linda would like to weigh in on this subject?

10:12 PM  

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