ArticleBone & joint research2021
The extensor efficiency of unicompartmental, bicompartmental, and total knee arthroplasty.
Article in Bone & joint research, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed, 16 citations in OpenAlex.
- Effect of robotic arm-assisted bi-unicompartmental knee arthroplasty versus total knee arthroplasty on objectively measured physical activity: secondary outcomes of a randomized controlled trial.Bone & joint research · 2026Article
- Lateral unicompartmental knee arthroplasty is associated with nearer-normal gait characteristics and higher patient satisfaction compared to total knee arthroplasty.Bone & joint research · 2026Article
- High-grade trochlear dysplasia increases patellofemoral joint pressure and decreases the knee extension torque, and tibial tubercle anteriorisation does not correct these effects: Biomechanical study in vitro.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025Article
- Indications and outcomes in bi-unicondylar knee arthroplasty: A systematic review.Journal of experimental orthopaedics · 2025Review
- Current status of bicompartmental arthroplasty.Arthroplasty (London, England) · 2025Review
- Are Current Patient-Reported Outcome Measures Fit for Purpose to Evaluate Unicompartmental Knee Arthroplasty?Journal of clinical medicine · 2025Review
- Load transfer in bone after partial, multi-compartmental, and total knee arthroplasty.Frontiers in bioengineering and biotechnology · 2024Article
- The compartmental approach to revision of partial knee arthroplasty results in nearer-normal gait and improved patient reported outcomes compared to total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2023Article
- Medial bicompartmental arthroplasty patients display more normal gait and improved satisfaction, compared to matched total knee arthroplasty patients.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2023Article
- The risk of tibial eminence avulsion fracture with bi-unicondylar knee arthroplasty : a finite element analysis.Bone & joint research · 2022Article
- Bi-unicondylar arthroplasty : a biomechanics and clinical outcomes study.Bone & joint research · 2021Article
- The revision partial knee classification system: understanding the causative pathology and magnitude of further surgery following partial knee arthroplasty.Bone & joint open · 2021Article
Corrections and comments
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Authors and funding
5 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
aimsUnicompartmental knee arthroplasty (UKA) and bicompartmental knee arthroplasty (BCA) have been associated with improved functional outcomes compared to total knee arthroplasty (TKA) in suitable patients, although the reason is poorly understood. The aim of this study was to measure how the different arthroplasties affect knee extensor function.
methodsExtensor function was measured for 16 cadaveric knees and then retested following the different arthroplasties. Eight knees underwent medial UKA then BCA, then posterior-cruciate retaining TKA, and eight underwent the lateral equivalents then TKA. Extensor efficiency was calculated for ranges of knee flexion associated with common activities of daily living. Data were analyzed with repeated measures analysis of variance (α = 0.05).
resultsCompared to native, there were no reductions in either extension moment or efficiency following UKA. Conversion to BCA resulted in a small decrease in extension moment between 70° and 90° flexion (p < 0.05), but when examined in the context of daily activity ranges of flexion, extensor efficiency was largely unaffected. Following TKA, large decreases in extension moment were measured at low knee flexion angles (p < 0.05), resulting in 12% to 43% reductions in extensor efficiency for the daily activity ranges.
conclusionThis cadaveric study found that TKA resulted in inferior extensor function compared to UKA and BCA. This may, in part, help explain the reported differences in function and satisfaction differences between partial and total knee arthroplasty. Cite this article:
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