Problem w/ diagnostic models

Discussion in 'exocad' started by Eleni P., Jun 8, 2018.

  1. Eleni P.

    Eleni P. New Member

    Even though I follow the pinned guide, every single time that I try to create a model I get this message when I try to load the pontics as attachments in model creator. EVERY. SINGLE. TIME.
    Does anyone know why? Or how I will be able to merge the pontics and the model together????
     

    Attached Files:

  2. 2thm8kr

    2thm8kr ɹotɐɹʇsıuıɯqA Staff Member

    Which tooth library are you using to design the pontic?
     
  3. Eleni P.

    Eleni P. New Member

    Generic - the original one
     
  4. 2thm8kr

    2thm8kr ɹotɐɹʇsıuıɯqA Staff Member

    Can you upload the model and pontic files here?
     
  5. 2thm8kr

    2thm8kr ɹotɐɹʇsıuıɯqA Staff Member

    Or zip the CAD file and load it here?
     
  6. Eleni P.

    Eleni P. New Member

    Of course, but in a couple of hours that I will get to work. Keep in mind that I encounter this problem every time no matter what project I have to make a diagnostic model for.
     
  7. odontotecniCAD

    odontotecniCAD New Member

    Hello.
    Sometimes it happens to me too.
    I found that it depends on how the pontic are placed on the model before exporting them and sometimes how they are soldered.
    They must be contextualized well ..... but I do not know what the software intends well.
    I just turned a short video for a friend today, if I find the time to put some comments in English I send it.
    I do this way:
    In the DB on the affected elements, I select reduced pontic or pontic.
    I open exo and position the pontic.
    I try to position them as best as possible, making sure that their shape conforms well with the model.
    I proceed with the finalization of the pontic that can be single or welded.
    I export the finished parts as .stl in their position, if you use the generated file for M_center it does not import them in the position where you placed them
    Now go into expert and delete all the parts built.
    Then I select the import mesh command, select import waxup and go to get the same model on which I made my digital waxing.
    Now you can return to the wizard or continue in expert. We generate the waxup and go on, when we are in free forming I select add attacks and select to add from file. I go to select and import the previously modified pontic elements I select apply and you're done.
    I continue bringing the waxup to the end.
    sorry for my English
     
  8. Eleni P.

    Eleni P. New Member

    Sorry it took me 2 days to upload the files, I encountered some problems with my external hard drive. Here you go. I hope you will find out what is causing the problem.
     

    Attached Files:

  9. 2thm8kr

    2thm8kr ɹotɐɹʇsıuıɯqA Staff Member

    The first thing I noticed is your scan data is not oriented properly.

    Inverted mesh.png


    This means that the pontics you are adding to the scan are in the wrong orientation too.

    inverted mesh2.png

    What scanner are you using?
     
    cadfan likes this.
  10. DMC

    DMC Scott Hudson

    I think it helps if your design does NOT have overlapping surfaces.

    Leave anatomy in Chain mode, or trim all interprox surfaces with little open space.

    This overlap maybe cause too many problems.

    no touch.png
     
  11. DMC

    DMC Scott Hudson

    See teeth go into each other? Molar surface enter the premolar surface.

    I suggest not doing this.

    Go back to design and trim teeth with air-gap in between teeth.

    Just a little.
     
    2thm8kr likes this.
  12. DMC

    DMC Scott Hudson

    Good idea 2th, but I don't think it will make a difference.


    Here are both mesh flipped 180 the correct way just for fun. Still original mesh, just flipped
     

    Attached Files:

  13. DMC

    DMC Scott Hudson

    Try this....I try to delete the areas where mesh was overlapping.

    This is new file I just edit....
     

    Attached Files:

  14. 2thm8kr

    2thm8kr ɹotɐɹʇsıuıɯqA Staff Member

    I've tried that already and I am still getting failed attachment error.
    In the older versions of exocad if you had a lot of interesting meshes model creator would fail to render a model
    so I think you are right on the money with your diagnosis of the problem.

    intersecting triangles.png

    There are a couple of interesting triangles. Lol
     
  15. 2thm8kr

    2thm8kr ɹotɐɹʇsıuıɯqA Staff Member

    exocad rendered a model after inverting both of the meshes. Computations took a long time.
    Here are the results. Lol
     

    Attached Files:

  16. DMC

    DMC Scott Hudson

    Sam, you tried with my newest mesh that I changed?

    Not just flipped, but corrected.

    Anyways....my specific, original instruction were clearly to leave all teeth in chain-mode, or to make sure no teeth overlap.

    This was the mistake.
     
    cadfan likes this.
  17. 2thm8kr

    2thm8kr ɹotɐɹʇsıuıɯqA Staff Member

    No, I didn't try that pontics with the cut intersections. I played with this enough this morning need to get back to the normally scheduled program here.
     
    cadfan and DMC like this.
  18. Eleni P.

    Eleni P. New Member

    The scanner that I am using is a Smart Optics Activity 845 but this particular case was 2 models in occlusion, and I uploaded the upper jaw files here, I don't think it has something to do with the orientation of the files. The problem still occurs with both jaws in occlusion in the original file case.
    You're suggesting using chain mode only? What freedom will this give me if I am not able to move and edit the teeth placement however I want when creating a mock up? Generally speaking.
     
  19. cadfan

    cadfan Moderator Staff Member

    chain mode produces no !!!!!! intersection but intersections if there can produce trouble .
     
    DMC likes this.
  20. Eleni P.

    Eleni P. New Member

    I started all over again and I cut all intersections between adjacent teeth. The intersections I DID NOT CUT were the ones between the pontics and the jaw, as I need them to become one. In the pinned thread it is said that they do not cause any trouble. Yet I get the same message again and again. Operation failed. It still cannot be done.
     
    Last edited: Jun 19, 2018

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