ArticleJournal of orthopaedic surgery and research2024
A high-flexion design total knee prosthesis: a ten to twelve-year follow-up study.
Article in Journal of orthopaedic surgery and research, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Chronic Pain and Stiffness After Total Knee Arthroplasty: A Comprehensive, Phenotype-Based Review of Mechanisms, Diagnosis and Management.Journal of clinical medicine · 2026Review
- Short-term Clinical and Radiologic Outcomes, and Survivorship Following Primary Total Knee Arthroplasty Using a Novel High-Flexion System among Indian Patients.Journal of orthopaedic case reports · 2026Article
- Clinical safety and efficacy of simultaneous bilateral total knee arthroplasty in an Asian population: a propensity score-matched analysis.Journal of orthopaedic surgery and research · 2025Article
- Using deep networks for knee range of motion monitoring in total knee arthroplasty rehabilitation.Frontiers in bioengineering and biotechnology · 2025Article
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Authors and funding
4 authors.
Funding
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Abstract
backgroundThe purpose of this study was to investigate the clinical and radiographic outcomes and to determine the survivorship of a high-flexion design total knee arthroplasty (TKA) prosthesis, the LOSPA knee system, over a follow-up period of 10-12 years.
methodsThe study included 386 patients (503 TKAs) who were treated with TKA from 2011 to 2013 (follow-up period 10-12 years).The patients were assessed clinically using range of motion (ROM) of the knee, the Knee Society scoring system (KSS), and the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC). For radiographic analysis, the positions of femoral and tibial implants as α, β, γ, and δ angles, hip knee ankle (HKA) angle, and radiolucent lines were used. Kaplan-Meier survival analysis was performed.
resultsMean ROM improved significantly from the preoperative baseline of 117.3° to 126.5° at the final follow-up (p < 0.001). The mean KSS and WOMAC scores also both showed significant improvement after surgery (all p < 0.001). A non-progressive radiolucent line less than 2 mm was observed in 23 cases (4.7%). Nine patients underwent revision surgery on the knee during the follow-up period. Revision surgery was performed on four patients due to aseptic loosening, three patients due to infection, one patient due to ankylosis, and one patient due to instability. When the endpoint of survival was the entire surgical cases, the survival rate was 96.2%. The survival rate, with revision for any reason as the endpoint, was 97.2%, and 97.8% for aseptic causes.
conclusionsThe LOSPA knee system, a high-flexion design total knee prosthesis, showed excellent long-term survivorship and improvements in clinical outcomes at 10- to 12-year follow-up.
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