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  • Immediate Denture

     XOcademy updated 1 month ago 2 Members · 5 Posts
  • Chris

    Member
    December 16, 2020 at 1:15 pm

    Doing upper full arch immediate denture. Guy has about 8 anterior teeth to be extracted. I used a vestibular scan bite to articulate the casts. Do the virtual extractions in the denture model now? The VE module states to do the extraction before entering the wizard, but then I would not be able to articulate the models.

    Thanks

    • This discussion was modified 1 month ago by  Chris. Reason: Improve narrative
  • Chris

    Member
    December 17, 2020 at 2:21 pm

    I’m going to reply to myself here: I figured out that Immediate dentures should be made as a pontic wax-up. Align models with the “Add-Mesh” tool in Expert mode. Then do virtual extractions.

    Question: My alignment mesh will line up with the upper, but the lower model does not join. Is that a separate step? I placed no common markers on the lower model while I was placing them on the upper. Can I put markers on both arches at once?

    • XOcademy

      Administrator
      December 18, 2020 at 9:50 am

      When you import the lower jaw, DentalCAD gives you the options of a) import scans relative to the scene or b) import scans relative to the existing scans.

      If you import your jaw scan with option B, you shouldn’t need to align anything. The imported scan will change the origin point or point of reference in relation to how you alter the existing scan positions.

      The way to do this, and it might be explained differently in the videos I made, is to articulate your dentate jaws first. Then import a Generic Visualization Mesh and select whatever jaw you’re going to edentulate. Then you have reference scan for the jaw position.

      Now, virtually extract the teeth on the working jaw scan. Your reference scan with the teeth will be a Generic Visualization Mesh so you can always go back to align scans.

      A third option is to save both the upper and lower jaw scans as a single STL that can be used later as a Bite Registration mesh. Because it’s the actual jaw scans used, when you use them to align scans they will match up 100% because the triangles are the same positions and orientation.

      • Chris

        Member
        December 18, 2020 at 1:56 pm

        OK that helps, but I am not able to articulate the upper and lower to begin with. They nest with inside each other with both occlusal surfaces up in the same direction – like they are both the same jaw scan…

        • XOcademy

          Administrator
          December 19, 2020 at 9:45 am

          I’m talking about using this scan…

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