Can you imagine 200 kg per square centimetre? That’s like the weight of three adults on a very small surface! That’s how strong the human jaw is, and this should also convince people to stay away from lions.
Not only the jaw is strong but also the enamel (outer layer of teeth) is the strongest substance in the human body, even strong than bone! I would still not recommend to chew anything with your teeth as some metallic objects can fracture the enamel.