Yes, blunt force trauma - quite a bit of it, actually.
But emergency medicine has nothing to do with it. None of the orthopedic surgeries I have undergone was done on an emergency basis.
I've already given you the terms in which to conduct the research. Calcium, co-foactors, re-build bone matrix, arthritis, nutrition, absorption, bioavailability
I was discharged from the military because of my back. Today, there isn't a orthopedic surgeon that can find a trace of what my medical records says I had-- which was diagnosed by three separate teams of doctors.