The tooth isn’t made of bone. Bones make blood, your teeth don’t make blood.
The tissue that makes up your teeth are pulp, dentin, enamel, and cementum.
If they are complaing about chest pain...
I believe crunches are the best for building physical strength, although the rest also do help.
Contributory negligence is when the negligence is the plaintiff's full fault or part of there fault. Or simply they are injured because of their own negligence or they may have contributed to their injury.
A defense to a claim of negligence