Enhancing the Unicompartmental Knee Arthroplasty Safety via Finite Element Analysis of Coronary Plane Alignment: A Case Report.

Autor:	Imada T; Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, JPN., Hanada M; Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, JPN., Murase K; Center for Industry-University Collaboration, Graduate School of Engineering Science, Osaka University, Osaka, JPN., Matsuyama Y; Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, JPN.
Jazyk:	angličtina
Zdroj:	Cureus [Cureus] 2024 Jun 05; Vol. 16 (6), pp. e61765. Date of Electronic Publication: 2024 Jun 05 (Print Publication: 2024).
DOI:	10.7759/cureus.61765
Abstrakt:	Although Oxford unicompartmental knee arthroplasty is often used to successfully treat patients with knee osteoarthritis isolated at the medial compartment, we present a case of fracture just below the tibial keel caused by either a shift in medial loading position or an increased amount of tibial osteotomy. Finite element analysis was used to determine which factor was more important. First, a 3D-surface model of the patient's tibia and the implant shape were created using computed tomography-Digital Imaging and Communications in Medicine (CT-DICOM) data taken preoperatively. The finite element analysis found that following unicompartmental knee arthroplasty, the cortical stress (normal, 5.8 MPa) on the medial tibial metaphyseal cortex increased as the load point moved medially (3 and 12 mm medially: 7.0 and 10.7 MPa, respectively) but was mild with increased tibial bone resection (2 and 6 mm lower: 6.1 and 6.5 MPa, respectively). Implanting the femoral component more medially than the preoperative plan increases stresses in the medial cortex of the tibia and may cause fractures. Competing Interests: Human subjects: Consent was obtained or waived by all participants in this study. Conflicts of interest: In compliance with the ICMJE uniform disclosure form, all authors declare the following: Payment/services info: All authors have declared that no financial support was received from any organization for the submitted work. Financial relationships: All authors have declared that they have no financial relationships at present or within the previous three years with any organizations that might have an interest in the submitted work. Other relationships: All authors have declared that there are no other relationships or activities that could appear to have influenced the submitted work. (Copyright © 2024, Imada et al.)
Databáze:	MEDLINE
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