{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T02:00:05Z","timestamp":1791424805768,"version":"4.3.3"},"reference-count":24,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2024,11,13]],"date-time":"2024-11-13T00:00:00Z","timestamp":1731456000000},"content-version":"vor","delay-in-days":43,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["esskajournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J. exp. orthop."],"published-print":{"date-parts":[[2024,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>A previous study on osteoarthritic knees found that the average position of the centre of the proximal quadriceps tendon (PQT) was 9\u2009mm lateral from the native trochlear groove. In patients with lateral patellar facet osteoarthritis, which indicates patellofemoral instability, the average location was 21\u2009mm. The researchers suggested that a position more lateral than 20\u2009mm might lead to poor outcomes after kinematically aligned total knee arthroplasty (KA TKA)\u2014the current study aimed to test this hypothesis.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>The study involved all patients (<jats:italic>n<\/jats:italic>\u2009=\u2009302) who underwent KA TKA (<jats:italic>n<\/jats:italic>\u2009=\u2009313) in 2019, had a post\u2010operative long\u2010leg scanogram and knee computed tomography scan, and completed a 2\u2010year questionnaire. An evaluator measured the location of the PQT relative to the centre of the distal prosthetic trochlear groove. A Spearman's rank correlation coefficient analysis determined whether there was an association between the location of the PQT and the Forgotten Joint Score (FJS) and Oxford Knee Score (OKS) at 2 years.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The mean location of the PQT was 11\u2009\u00b1\u20098\u2009mm (range, \u22122 medial to 36\u2009mm lateral), with 16% (<jats:italic>N<\/jats:italic>\u2009=\u200946) of the KA TKAs having a more lateral location than 20\u2009mm. The location of the PQT was not associated with the FJS (<jats:italic>r<\/jats:italic>\u2009=\u2009\u22120.0349, <jats:italic>p<\/jats:italic>\u2009=\u20090.7281) and OKS (<jats:italic>r<\/jats:italic>\u2009=\u2009\u22120.0641, <jats:italic>p<\/jats:italic>\u2009=\u20090.9009)\u2014no patient response indicated symptoms or operative treatment for patellofemoral instability.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Even though 16% of patients with a KA TKA had a more lateral location than 20\u2009mm, there is no reason to measure the centre of the PQT relative to the distal prosthetic groove. This is because the location did not show any association with the 2\u2010year FJS and OKS nor had any patient experienced patellofemoral instability.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of Evidence<\/jats:title><jats:p>IV.<\/jats:p><\/jats:sec>","DOI":"10.1002\/jeo2.70075","type":"journal-article","created":{"date-parts":[[2024,11,13]],"date-time":"2024-11-13T06:47:39Z","timestamp":1731480459000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["The location of the centre of the proximal quadriceps tendon in kinematically aligned total knee arthroplasty is not associated with poor outcome scores or symptomatic patellar instability"],"prefix":"10.1002","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0009-0000-5745-161X","authenticated-orcid":false,"given":"Daniel","family":"Razick","sequence":"first","affiliation":[{"name":"College of Medicine California Northstate University Elk Grove California 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Orthopedic Surgery University of California Davis California USA"},{"name":"Department of Mechanical Engineering University of California Davis California 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