Received: 9 October 2019
Accepted: 5 March 2020
First Online: 9 April 2020
Ethics approval and consent to participate
: All patients signed a written informed consent and local Ethical Committee approval was obtained (Comitato Etico Milano Area 2. Protocol N 2.0 BQ. 265_2017, 13th June 2017).
: All authors gave their consent for publication of the manuscript.
: All authors have no competing interests. The engineer LR, former working in Politecnico of Turin and now employed at the commercial company “TECHNOLOGIC S.r.l”, has extracted and tabulated the densitometric data and has applied the mathematical algorithms based on the finite element analysis to calculate the bone strain index. TECHNOLOGIC S.r.l. provided support in the form of salary for LR, but did not have any role in the study design, data collection and analysis, decision to publish or preparation of the manuscript.