Hold Shift while brushing over the inflated area. This melts the new geometry into the surrounding tooth structure, effectively "patching" the gap.
Click "Check All" to see if there are still non-manifold edges. blender for dental crack patched
Once the crack is patched, you must ensure the model is "watertight." Enable this built-in Blender add-on. Hold Shift while brushing over the inflated area
Select your dental model and hit Ctrl + Tab . blender for dental crack patched