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429 results on '"Argenson, Jean-Noel A"'

3. Prevalence of trochlear dysplasia in an 1162 retrospective cohort study using CT scans

Author

Vella-Baldacchino Martinique, Cipolla Alessandra, Guy Sylvain, LiArno Sally, Faizan Ahmad, Argenson Jean-Noel, and Ollivier Matthieu

Subjects
Knee, Patella, Patellofemoral, Trochlear dysplasia, Diseases of the musculoskeletal system, RC925-935
Abstract

Abstract Hypothesis/purpose The prevalence of trochlear dysplasia is common in different populations. Background The prevalence of trochlear dysplasia in the general population, categorised by sex, race, age, and body mass index, has been sparse. This study aimed to define the prevalence of trochlear dysplasia based on the latter categories. Study design Cohort retrospective study. Methods 1162 skeletal mature healthy femora were obtained from a CT-scan-based modelling system (SOMA). Thin slice CT scans were acquired exclusively for medical indications such as polytrauma (20%), CT angiography (70%) and other reasons (i.e. Total Joint Replacement) (10%). Trochlear dysplasia was measured using Pfirmann’s method. Patient demographics such as age, race and sex were recorded. Results The overall prevalence of trochlear dysplasia is 4.5% and is far more common in Asian female patients compared to Caucasian, African and Middle Eastern knees. Conclusion Overall, the prevalence of dysplasia in the general population was determined to be 4.5%, with female patients being more likely to suffer from the condition. Patients of Asian and Caucasian race were more likely to have trochlear dysplasia, while Middle Eastern male patients displayed more dysplastic values than their female counterparts.

Published
2024
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6. Recommendations from the French Societies of Rheumatology and Physical Medicine and Rehabilitation on the non-pharmacological management of knee osteoarthritis

Author

Pers, Yves-Marie, Nguyen, Christelle, Borie, Constance, Daste, Camille, Kirren, Quentin, Lopez, Cyril, Ouvrard, Gaëlle, Ruscher, Romane, Argenson, Jean-Noël, Bardoux, Sylvie, Baumann, Laurence, Berenbaum, Francis, Binard, Aymeric, Coudeyre, Emmanuel, Czernichow, Sébastien, Dupeyron, Arnaud, Fabre, Marie-Christine, Foulquier, Nathan, Gérard, Caroline, Hausberg, Vivien, Henrotin, Yves, Jeandel, Claude, Lesage, François-Xavier, Liesse, Brigitte, Mainard, Didier, Michel, Fabrice, Ninot, Grégory, Ornetti, Paul, Oude-Engberink, Agnès, Rat, Anne-Christine, Richette, Pascal, Roren, Alexandra, Thoumie, Philippe, Walrand, Stéphane, Rannou, François, and Sellam, Jérémie

Published
2024
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35. Indications for the addition of a patellofemoral joint arthroplasty following a previous unicondylar knee arthroplasty– a literature review and Delphi consensus.

Author

Jones, Gareth G., Campi, Stefano, von Knoch, Fabian, Lunebourg, Alexandre, London, Nick, Barrett, David, and Argenson, Jean-Noel

Abstract

Introduction: The aim of this study was to establish an international consensus statement on the indications for the addition of a patellofemoral joint arthroplasty (PFJA) in patients with a unicondylar knee arthroplasty (UKA) and symptomatic progression of patellofemoral compartment osteoarthritis. Materials and methods: A systematic review of the literature was conducted, and the results used to inform the development of a statement by an expert working group. This was then evaluated and modified, using a Delphi process, by members of the European Knee Society (EKS). Results: Forty-nine (round one) and forty-two (round two) EKS members took part in the Delphi process, with 83% agreement on the resulting consensus statement that the indications for this procedure are: (1) a well-functioning UKA in a satisfied patient with secondary osteoarthritis progression in the patellofemoral compartment (2), symptomatic patellofemoral compartment osteoarthritis with full thickness cartilage loss affecting the lateral facet of the patellofemoral joint (3), functional ligaments, including the anterior cruciate ligament (ACL) (4), a lateral tibiofemoral compartment with no cartilage damage greater than Ahlback Grade 1 (5), knee flexion ≥ 100° and extension loss ≤ 5° and (6) older patients with increased medical co-morbidities. Conclusions: The simple addition of a PFJA to patients with an existing UKA and progression of patellofemoral compartment osteoarthritis is an attractive option. This EKS Delphi-derived consensus statement, which reached a strong consensus, can be used by clinicians to identify patients suitable for this procedure. [ABSTRACT FROM AUTHOR]

Published
2025
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36. Patella height ratios diagnose the same healthy knees differently.

Author

Vella-Baldacchino, Martinique, Cipolla, Alessandra, Asghar, Zahid, LiArno, Sally, Faizan, Ahmad, Argenson, Jean-Noel, and Ollivier, Matthieu

Subjects
INTRACLASS correlation, GAUSSIAN distribution, KNEE, PERCENTILES
Abstract

Our study aims to investigate if the ratios proposed by Insall-Salvati and Caton-Deschamps follow the theory of normal distribution levels in a healthy population. 434 skeletal mature, healthy knees were obtained from a CT-scan-based modelling system (SOMA). Patellae height ratios were measured using the Insall-Salvati ratio and the Caton-Deschamps index. The patella height ratios of the sample population were plotted on a quantile plot and diagnosed as patella alta, baja or normal using the original ratio definitions. The study population patella height values at the 95th, 98th and 5th centiles were identified and compared to those described as alta or baja by Insall-Salvati and Caton-Deschamps. This meant that if the patient had patella alta, this would be defined as a ratio of ≥ 1.2 and hypothesised that this would align at the 98th centile of the study population, whilst if diagnosed as patella baja (≤ 0.74), this should align at the 5th centile of the population. The inter-rater reliability of both ratios was calculated using kappa statistics. Two authors made all calculations and compared them for consistency using the intraclass correlation coefficient. For the Insall-Salvati ratio, the study population's value at the 98th centile was equivalent to what Insall-Salvati describes as alta, a ratio of ≥ 1.2. In the study population, patients are overdiagnosed if using the Insall-Salvati ratio as patella baja ≤ 0.74, as the value at the 5th centile in the study population was 0.59. Using the Caton-Deschamps index, the 95th centile was 1.3, higher than the patella alta ratio determined by Caton as a ratio ≥ 1.2. Using Caton-Deschamps, patients are being underdiagnosed if utilising a patella baja ratio of ≤ 0.6. In our population, the 5th centile was 0.75. The two ratios had a kappa coefficient of 0.01, which indicates poor inter-rater reliability. Depending on the ratio used, caton-Deschamps and Insall-Salvati ratios diagnose patients as alta or baja differently. The current patella height ratios have originated from very small, select population samples. The future of patella height discussion should begin with data representing large populations. Then, we can discuss the upper and lower limits of abnormality. [ABSTRACT FROM AUTHOR]

Published
2025
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