A total hip replacement with loosening of the femoral component was revised. The original femoral component with a 35-mm head was exchanged for one with a 32-mm head. The mismatch caused extensive wear of the acetabular component. The importance of preoperative planning in revision surgery is stressed.
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http://dx.doi.org/10.3109/17453678909149261 | DOI Listing |
Purpose: Robotic-assisted total knee arthroplasty (RA-TKA) has gained popularity for its potential ability to improve surgical precision and patient outcomes, despite concerns about its long learning curve and increased operative times. The aim of this study is to evaluate the learning curve of the ROSA® Knee System, the relationship between each phase of the learning curve and the accuracy of the robotic system in femoral component size and knee alignment prediction.
Methods: A single surgeon retrospective analysis of total operative time (TOT) and total robotic time was conducted.
Comput Methods Biomech Biomed Engin
January 2025
Department of Orthopedics and Traumatology, Izmir Bozyaka Education and Research Hospital, Izmir, Turkey.
This study introduces a novel anchor-type proximal femoral nail (AT-PFN) to improve the bone-fixation integrity over the standard screw-type nail (SST-PFN). Quasi-static incremental cyclic load test was performed to investigate load-displacement, cumulative deformation energy, time-strain, and backbone curves. The finite element analysis (FEA) was implemented to identify the stress and strain distributions.
View Article and Find Full Text PDFOper Orthop Traumatol
January 2025
Klinik für Unfall‑, Hand und Wiederherstellungschirurgie, Universitätsmedizin Rostock, Schillingallee 35, 18057, Rostock, Deutschland.
Objective: Treatment with transcutaneous osseointegrated prosthesis systems (TOPS) for short femoral amputation stumps aims to restore independent walking ability after proximal femoral amputation by direct bone-guided prosthesis anchorage. This cannot be safely achieved with conventional socket prostheses due to the mechanically inadequate socket contact surface.
Indications: Treatment of patients with short transfemoral stumps who cannot be mobilized sufficiently with conventional socket prostheses.
Dislocation is the second most common indication for revision total hip arthroplasty (THA). In revision cases the dislocation rate can be as high as 5-30%. The aim of this study was to assess the outcome, specifically the dislocation rate in revision THA where a dual mobility cup was used.
View Article and Find Full Text PDFJ Exp Orthop
January 2025
Department of Orthopaedic Surgery, Faculty of Medicine The University of Tokyo Tokyo Japan.
Purpose: To clarify the influence of biomechanics on post-operative clinical outcomes in bicruciate-retaining total knee arthroplasty (BCR-TKA).
Methods: Severe medial osteoarthritis who underwent BCR-TKA were examined. Each patient was asked to perform a squat (weight-bearing [WB]) and active assisted knee flexion (non-WB [NWB]) under single fluoroscopy surveillance.
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