My dentae are primarily made for crushing and grinding, and my jaw hinge allows me to shift my lower jaw back and forth in a sawing motion if I need to (roughly) sever something. If I need to tear into a larger meal, I generally transform the lower jaw of my alt mode into place so I can use the sharp fangs. When my mouth is closed, my dentae retract slightly to save space, and if I am not using them, I can keep them retracted with my mouth open in order to avoid threatening people.