If I was to start over and conduct a study I would do the following:
X-ray before, at the 100 day mark, the 1 year and the 2 years mark.
There is a device that building inspectors use to test the foundation and the density of concrete, it a pressure gauge and it is used by pressing it against a surface and it gives a read out, I would do that on my right and left to compare, again at the beginning, 100 day, 1 year and 2 year mark.
And impact test would be cool too, but there are too many variables, unless you can make it as close to a "dead hang drop" as possible.
Psalms 144:1
Praise be my Lord my Rock,
He trains my hands for war, my fingers for battle !