Conversion of failed internal fixation in proximal femur fractures using calcar-guided short-stem total hip arthroplasty.

"Declarations Ethics approval and consent to participateAll procedures were performed in accordance with the Declaration of Helsinki. Ethical approval was obtained from the Hessen Ethics Review Board (2019–1164-evBO), and all patients gave their permission to participate in the study. English editing serviceThe manuscript was edited for correct English language usage by qualified native English-speaking editors at Charlesworth Author Services. Consent to participateAll patients gave their verbal and written permission to participate prior to inclusion. Competing interestsKPK serve as instructor for Mathys Ltd., Bettlach, Switzerland. All other authors declare that they have no competing interests. Competing interests KPK serve as instructor for Mathys Ltd., Bettlach, Switzerland. All other authors declare that they have no competing interests."

"Funding Open Access funding enabled and organized by Projekt DEAL. This study was supported by Mathys Ltd., Bettlach, Switzerland. No funding was received to assist with the preparation of this manuscript."