A study was done on the role of postoperative leg length inequality (LLI) in aseptic loosening after total hip arthroplasty (THA). Data on 405 McKee-Farrar hip replacements performed at the Invalid Foundation, Helsinki, Finland were available for the study. The mean lengthening of the operated leg was 0.8 cm after an average follow-up of 7.7 years. Of these hips, 63 (15.6%) subsequently underwent revision due to aseptic loosening of the prosthesis. Several risk factors were analysed using multivariate stepwise regression analysis to find factors which predispose patients to loosening: overlength of the operated limb proved to be the most important. Our conclusion is that overlengthening should be avoided by careful preoperative and intraoperative length measurements and proper selection of prostheses. If there is marked overlengthening of the replaced hip postoperatively, it should be corrected.
Download full-text PDF |
Source |
---|
JBJS Essent Surg Tech
May 2024
Radboud University Medical Center, Nijmegen, The Netherlands.
Background: This video article describes the use of bone-anchored prostheses for patients with transtibial amputations, most often resulting from trauma, infection, or dysvascular disease. Large studies have shown that about half of all patients with a socket-suspended artificial limb experience limited mobility and limited prosthesis use because of socket-related problems. These problems occur at the socket-residual limb interface as a result of a painful and unstable connection, leading to an asymmetrical gait and subsequent pelvic and back pain.
View Article and Find Full Text PDFSurg Technol Int
January 2025
Department of Orthopaedic Surgery, Illinois Center for Orthopaedic Research & Education (iCore), Hinsdale, Illinois.
There were 63 outpatient medial unicompartmental knee arthroplasties (UKAs) performed by Mako robotic assistance by six surgeons. There were 40 men and 23 women who had a mean age of 65.1 years (range, 38 to 80).
View Article and Find Full Text PDFJ Arthroplasty
January 2025
Department of Orthopaedic Surgery, Division of Lower Limb Reconstruction, University of British Columbia, Vancouver, British Columbia, Canada.
Background: Pelvic discontinuity (PD) poses a difficult challenge in revision total hip arthroplasty (rTHA). There is a paucity of evidence assessing five- to ten-year outcomes of cup cages for PD. This study aimed to review the survivorship and outcomes of cup-cage constructs for PD.
View Article and Find Full Text PDFJ Biomech
January 2025
Radboudumc, Orthopaedic Research Lab, PO Box 9101, 6500 HB Nijmegen, the Netherlands.
Aseptic loosening is the primary cause of revision in cementless total knee arthroplasty (TKA), emphasizing the importance of strong initial stability for long-term implant success. Pre-clinical evaluations are crucial for understanding implant fixation mechanics and improving implant designs. Finite element (FE) analysis models often use linear elastic bone material models, which do not accurately reflect bone's mechanical behavior.
View Article and Find Full Text PDFKnee
December 2024
Orthopedic Surgery and Traumatology, Hospital Clínic de Barcelona, Barcelona, Spain.
Distal femoral replacement (DFR) with megaprostheses is a salvage revision total knee arthroplasty (rTKA) procedure indicated in cases with massive bone defects in the distal femur. As long as these implants achieve fixation only in the diaphysis, the high aseptic loosening rate reported in some series is probably related to a lack of rotational stability. Two patients with extensive distal femoral bone defects with preservation of the metaphyseal-diaphyseal junction underwent rTKA.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!