Virtually Creating or Removing Teeth
Click IO Scan on the menu bar.
Click 
Add/Remove teeth.
Notes
To manually adjust the detected scan range, click 
Edit upper scan rangeor Edit lower scan range(depending on the setup) by using the white handles on the tooth chart. Click Save.
Missing teeth are selected by default.
Indicate the tooth positions that you want to modify:
To simultaneously extract and create a tooth, click an existing tooth position.
To just extract a tooth or create a virtual tooth, right-click a tooth to select the Create tooth or Extract tooth action.
Click Next.
Check if all teeth are correctly indicated. If needed, click Indicate teeth manually to correct the tooth positions. If both the upper and lower jaw are included, re-click Next to check the teeth on the opposite jaw.
Click Finish.
The IO scan is altered and the model is updated.
Note
To show the original IO scan, click the smart panel 
Visibility tab. Select the altered IO scan, click 
and select Original scan model. Alternatively, right-click the intraoral scan model in the workspace viewer, select IO scans and click Original scan model.
To adjust the position of a virtual tooth, use the 
Adjust smart panel, or select Edit position in the right-click menu. Select Lock position during recalculation to keep the virtual tooth on this position when you click 
Recalculate virtual teeth and run MagicAssist again.