Muñoz Mahamud, ErnestoChimeno, ClaraFernández-Valencia, J. A. (Jenaro-Ángel)Alías, AlfonsoSerra, AdriàPostnikov, YuryCombalía Aleu, Andrés2025-03-272025-03-272023-05-150341-2695https://hdl.handle.net/2445/220053Purpose: Failure to restore the femoral offset of the native hip is a potential cause of dysfunctional hip arthroplasty. The aim of this study was to report our experience of using a modular head-neck adapter in revision THA, specifically analyzing its usefulness as a tool to correct a slightly diminished femoral offset. Materials and methods: This was a retrospective single-center study including all hip revisions performed at our institution from January 2017 to March 2022 where the BioBallTM head-neck metal adapter was used. The preoperative and one year follow-up modified Merle d'Aubigné hip score was used to evaluate functional outcomes. Results: Of a total of 34 cases included for revision, the head-neck adapter system was used specifically in six patients (17.6%) to increase femoral offset, retaining both the acetabular and femoral components. In this subgroup of patients, mean offset decrease after primary THA was 6.6 mm (4.0-9.1), equivalent to a mean 16.3% femoral offset reduction. The median modified Merle d'Aubigné score went from 13.3 preoperatively to 16.2 at one year follow-up. Conclusion: The use of a head-neck adapter is a safe and reliable procedure that may allow the surgeon to easily correct a slightly diminished femoral offset in a dysfunctional THA without the need to revise well-fixed prosthetic components.7 p.application/pdfengcc by (c) Muñoz Mahamud, Ernesto et al., 2023https://creativecommons.org/licenses/by/4.0/Cirurgia ortopèdicaTraumatologiaCirurgia dels ossosOrthopedic surgeryTraumatologySurgery of bonesinfo:eu-repo/semantics/article7386712025-03-27info:eu-repo/semantics/openAccess37188902