Actually, if you load the "before", no fangs, obj of Jelissa's suggestion as a head morph and set it to -1 and the "after", fangs, morph and set it 1 they should cancel out leaving just the fangs. Make sure all the other morphs are 0 and spawn morph target to get just the fangs, export it as an obj and reapply it to a standard V3 and you can lose the construction stages.