AUTHOR=Ma Yingkai , Ma Xinnan , Cheng Shi , Lv Songcen , Qi Xin 

TITLE=Implant loosening following THA with S-ROM prosthesis and subtrochanteric osteotomy: Three case reports

JOURNAL=Frontiers in Surgery

VOLUME=Volume 9 - 2022

YEAR=2023

URL=https://www.frontiersin.org/journals/surgery/articles/10.3389/fsurg.2022.1090067

DOI=10.3389/fsurg.2022.1090067

ISSN=2296-875X

ABSTRACT=Prosthesis loosening after THA is a rather common problem. For DDH patients with CroweIV, the surgical risk and complexity is significant. THA with S-ROM prosthesis combined with subtrochanteric osteotomy is the common treatment. However, In THA, loosening of a modular femoral prosthesis (S-rom) is uncommon and has a very low incidence. With modular prostheses Distal prosthesis looseness are rarely reported. Nonunion osteotomy is a fairly uncommon complication of subtrochanteric osteotomy.  We report three patients with CroweIV DDH who developed loosening of their prosthesis following THA with S-ROM prosthesis and subtrochanteric osteotomy. We address the management of these patients and prosthesis loosening likely underlying causes.