Does Computer-Assisted Femur First THR Improve Musculoskeletal Loading Conditions?

  • We have developed a novel, computer-assisted operation method for minimal-invasive total hip replacement (THR) following the concept of “femur first/combined anteversion,” which incorporates various aspects of performing a functional optimization of the prosthetic stem and cup position (CAS FF). The purpose of this study is to assess whether the hip joint reaction forces and patient’s gait parameters are being improved by CAS FF in relation to conventional THR (CON). We enrolled 60 patients (28 CAS FF/32 CON) and invited them for gait analysis at three time points (preoperatively, postop six months, and postop 12 months). Data retrieved from gait analysis was processed using patient-specific musculoskeletal models. The target parameters were hip reaction force magnitude (hrf), symmetries, and orientation with respect to the cup. Hrf in the CAS FF group were closer to a young healthy normal. Phase-shift symmetry showed an increase in the CAS FF group. Hrf orientation in the CAS FF group was closer to optimum, though no edge or rim-loading occurred in the CON group as well. The CAS FF group showed an improved hrf orientation in an early stage and a trend to an improved long-term outcome.

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Author:Tim A. Weber, Sebastian DendorferORCiD, Joachim GrifkaORCiD, Gijsbertus Jacob Verkerke, Tobias Renkawitz
Parent Title (English):BioMed Research International
Editor:Michiaki Takagi
Document Type:Article
Year of first Publication:2015
Release Date:2020/05/18
GND Keyword:Hüftgelenkprothese; Operationstechnik; Computerunterstütztes Verfahren; Bewegungsapparat; Mechanische Belastung
Pagenumber:16 Seiten
First Page:ID 625317
Institutes:Fakultät Maschinenbau
Regensburg Center of Biomedical Engineering - RCBE
Fakultät Maschinenbau / Labor Biomechanik (LBM)
OpenAccess Publikationsweg:Gold Open Access- Erstveröffentlichung in einem/als Open-Access-Medium
research focus:Lebenswissenschaften und Ethik