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Scanbodies and Edentulous Ridges

Scanning long span edentulous is a very likely culprit with rendering dimensionally accurate models because to the software and camera, the geometric shapes are too identical across the ridge.

The more we can disrupt the symmetry with large, short, non-reflective and asymmetric scanbodies, the more likely we are to keep the models accurate. This video presentation address some of those issues and how to overcome them.

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How Medit’s AI Killed The Tibase Scanbody Star!

here is a list of why the Medit Artificial Intelligent Implant Suprastructure Identification System is significantly more advantageous over all other cadcam systems.

  1.  It s technically a crown and bridge case and the implant location or timing does not matter
  2. You can find margins outside the mouth!  See the first video to appreciate the significance of this
  3. You don’t have to deal with retraction or hemostatis at all
  4.  You don’t have to worry about sprue position. Many other systems force the placement of the sprue to a specific location often making the case more difficult to manage than necessary
  5.  you are not limited to just a few implant lines
  6.  you don’t have to worry about location of anti rotational notch
  7.  you can digitally alter the prep and get a virtual reduction coping in cad
  8.  Use any restorative block you want.  There is no need to order special blocks with pre-fabricated access channels and keep a large inventory of many colors. Your regular block inventory will suffice.  Just make sure the top of the tibase is wider than the diameter of the drill used to mill out the intaglio.  Also, the CAM and the milling machine determine the exact product and different settings maybe utilized to give you relief off the walls.  Some will even remove the antirotational notch because the adaptation is so tight, the restoration will not rotate due to the tall walls of the tibase
  9.  You can check the fit outside the mouth on the same tibase or a one you keep chairside for every case to let you know that if you are not seating, it is clearly a contact or contour issue as opposed to an intaglio issue.


Digital Tibase - Medit's AI Feature

Fit of Tibase to Milled Restoration

With Medit’s Crown Fit function, you can see exactly how much cement is required to seat the restoration and how well it is adapted to the tibase.

Medit Crown Fit
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How Deep is Your Scan?

A cool new feature in the upcoming Medit i500 is the opportunity to capture deep areas that are out of the camera’s focal length (-1.5 to 17mm). This usually happens in complex implant cases, or in this case where the anterior four teeth were traumatized.

With very little tooth structure remaining, a custom post and core was required to restored the dentition with a very guarded prognosis. After root canal therapy, the chamber was accessed and a conventional impression was taken.

Separate from this, a clinical digital impression was taken of the temporaries, the opposing and the buccal bite. The margins of the preps were protected and the chamber was deleted / cropped. As you can see, there are hollow areas in the depth of the chambers where the topography was outside the focal length. Scanning the impression as a negative gives easy access to the depths of the chamber, allowing you to form a model that is well outside the imagine range of the neighboring teeth.

The software allows you to image intra-orally and then allows you to fill in the voids by imaging the impression instead.