ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2017
Effects of upright weight bearing and the knee flexion angle on patellofemoral indices using magnetic resonance imaging in patients with patellofemoral instability.
Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 1 of them a synthesis that pooled it.
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Who cites it
26 citing papers in PubMed, 1 synthesis or guideline pooled it.
- A Word of Caution for Future Studies in Patellofemoral Pain: A Systematic Review With Meta-analysis.The American journal of sports medicine · 2021Pooled it
- Differential effects of knee flexion on Caton-Deschamps, patellotrochlear and Insall-Salvati indices: A dynamic magnetic resonance imaging-controlled study.Journal of experimental orthopaedics · 2026Article
- Lateral patellar maltracking and patellar alta in the absence of increased TT-TGBMC medical imaging · 2025Article
- Arthroscopic Management of Patellar Instability in Skeletally Immature Patients: Current Concepts and Future Directions.Journal of clinical medicine · 2025Review
- Patellofemoral positioning CT protocol has diagnostic ability to differentiate patellar maltracking phenotype.Journal of orthopaedics · 2025Article
- Abnormal sagittal patellar tilt during active knee flexion and extension on 4DCT might be associated with patellofemoral pain.BMC musculoskeletal disorders · 2025Article
- Radiological assessment of lower limb torsional deformities: a narrative review.Annals of joint · 2025Review
- Established practices and future insights into patellar instability surgery: A review.Joint diseases and related surgery · 2024Review
- Risk Factors for Atraumatic Medial Patellar Facet Lesions.Orthopaedic journal of sports medicine · 2024Article
- Patellar Tracking: An Old Problem with New Insights.Radiographics : a review publication of the Radiological Society of North America, Inc · 2023Article
- Inter- and intra-observer reliability of patellar height measurements in patients with and without patellar instability on plain radiographs and magnetic resonance imaging.Skeletal radiology · 2022Article
- Future Directions in Patellofemoral Imaging and 3D Modeling.Current reviews in musculoskeletal medicine · 2022Review
- Adolescents and adults with patellofemoral pain exhibit distinct patellar maltracking patterns.Clinical biomechanics (Bristol, Avon) · 2021Article
- Assessment of the Degree of Osteoarthritis in Aging Male and Female Femoral Condyles: A Cadaveric Study.Cartilage · 2021Article
- Weight-bearing MRI with a knee flexion angle of 20°: a study on additional MRI investigation modalities to support a more accurate understanding of patellofemoral instability.BMC musculoskeletal disorders · 2021Article
- Tibial tuberosity-tibial intercondylar midpoint distance measured on computed tomography scanner is not biased during knee rotation and could be clinically more relevant than current measurement systems.International orthopaedics · 2021Article
- Correlation of T2* relaxation times of the retropatellar cartilage with tibial tuberosity-trochlea groove distance in professional soccer players.Scientific reports · 2020Article
- Article
- Sagittal patellar flexion angle: a novel clinically validated patellar height measurement reflecting patellofemoral kinematics useful throughout knee flexion.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2020Article
- Patellar instability: the reliability of magnetic resonance imaging measurement parameters.BMC musculoskeletal disorders · 2019Article
Corrections and comments
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Authors and funding
7 authors.
Funding
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Abstract
purposeThis study analysed the effects of upright weight bearing and the knee flexion angle on patellofemoral indices, determined using magnetic resonance imaging (MRI), in patients with patellofemoral instability (PI).
methodsHealthy volunteers (control group, n = 9) and PI patients (PI group, n = 16) were scanned in an open-configuration MRI scanner during upright weight bearing and supine non-weight bearing positions at full extension (0° flexion) and at 15°, 30°, and 45° flexion. Patellofemoral indices included the Insall-Salvati Index, Caton-Deschamp Index, and Patellotrochlear Index (PTI) to determine patellar height and the patellar tilt angle (PTA), bisect offset (BO), and the tibial tubercle-trochlear groove (TT-TG) distance to assess patellar rotation and translation with respect to the femur and alignment of the extensor mechanism.
resultsA significant interaction effect of weight bearing by flexion angle was observed for the PTI, PTA, and BO for subjects with PI. At full extension, post hoc pairwise comparisons revealed a significant effect of weight bearing on the indices, with increased patellar height and increased PTA and BO in the PI group. Except for the BO, no such changes were seen in the control group. Independent of weight bearing, flexing the knee caused the PTA, BO, and TT-TG distance to be significantly reduced.
conclusionsUpright weight bearing and the knee flexion angle affected patellofemoral MRI indices in PI patients, with significantly increased values at full extension. The observations of this study provide a caution to be considered by professionals when treating PI patients. These patients should be evaluated clinically and radiographically at full extension and various flexion angles in context with quadriceps engagement. LEVEL OF EVIDENCE: Explorative case-control study, Level III.
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