I don't want to tax my memory too much
but here are some tidbits I remember very clearly that I think you will find interesting:
Bone density does not correlate with bone strength. One person may have high bone density but weak bones while another may have low bone density and strong bones.
Also, as you might imagine, it's possible to build bone density while at the same time the bone remains weak. It fits in with the first statement.
High bone density in one part of the body does not mean you will have the same in other parts of your body, and vice versa for low bone density.
All bones, whether weak or strong, can be broken if hit the right way. So the biggest risk for fracturing bones is falling. Therefore the most important thing one can do to keep from fracturing is to maintain good overall health and strength to keep from falling.
That's about it, my memory has been taxed.