- Make the cross-sections first (previous topic): the canal is easiest to see on them, and Auto-fill needs them.
- In the Implant panel, choose the Nerve canal tab and pick Right or Left.
- Click Trace canal. Click the mental foramen on the coronal view, then a few points back along the canal on the sagittal view or on the cross-sections, to the mandibular foramen. Double-click to finish.
- Click Auto-fill to follow the darkest path between your end points, then check the canal on several cross-sections.
- To correct it, drag a point on any view; shift-click a point to delete it; Undo steps back. Repeat for the other side.
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