{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,27]],"date-time":"2026-10-27T03:57:20Z","timestamp":1793073440070,"version":"4.5.0"},"reference-count":33,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2023,10,26]],"date-time":"2023-10-26T00:00:00Z","timestamp":1698278400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2023,10,26]],"date-time":"2023-10-26T00:00:00Z","timestamp":1698278400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"},{"start":{"date-parts":[[2023,10,26]],"date-time":"2023-10-26T00:00:00Z","timestamp":1698278400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2023,10,26]],"date-time":"2023-10-26T00:00:00Z","timestamp":1698278400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"DOI":"10.13039\/501100004721","name":"The University of Tokyo","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100004721","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"published-print":{"date-parts":[[2023,12]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>Patellofemoral (PF) compartment cartilage lesions are a frequent problem after anterior cruciate ligament (ACL) reconstruction. This study aimed to determine the factors that influence PF cartilage lesions after anatomical ACL reconstruction.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>This study enrolled a total of 114 patients who did not manifest PF compartment cartilage lesions during anatomical ACL reconstruction and underwent second\u2010look arthroscopy 18\u00a0months postoperatively. Arthroscopy using the International Cartilage Repair Society (ICRS) classification was used to assess cartilage lesions. The correlation between surgical findings, radiographic factors, and clinical factors and change of ICRS grade was analysed. Multivariate regression analysis was conducted to reveal the independent risk factors for PF cartilage lesions among patients\u2019 demographic data and parameters that correlated with the change of ICRS grade in the correlation analyses.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      ICRS grade changes in PF cartilage were significantly correlated with age, sex, quadriceps strength at 1\u00a0year postoperatively, hamstrings strength at pre\u2010 and 1\u00a0year postoperatively, and single leg hop test at 1\u00a0year postoperatively. However, no significant correlation was found between the time between injury and surgery, posterior tibial slope angle, pre\u2010 and postoperative Tegner activity scale, graft type, initial graft tension, meniscus injury, meniscus injury treatment, pre\u2010 and postoperative range of motion, anteroposterior laxity and preoperative quadriceps strength, and the change in ICRS grade. Multivariate regression analysis revealed male (\n                      <jats:italic>P<\/jats:italic>\n                      \u2009=\u20090.019) and quadriceps strength weakness at 1\u00a0year postoperatively (\n                      <jats:italic>P<\/jats:italic>\n                      \u2009=\u20090.009) as independent risk factors for PF cartilage lesions.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Quadriceps strength weakness 1\u00a0year after ACL reconstruction and males were correlated with a new PF cartilage lesion after anatomical ACL reconstruction, with no significant correlation between bone\u2010patellar tendon\u2010bone autograft, initial graft tension, or extension deficit and new PF cartilage lesion. Rehabilitation that focuses on quadriceps strength after ACL reconstruction is recommended to prevent new PF cartilage lesions.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of evidence<\/jats:title>\n                    <jats:p>Level IV.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00167-023-07633-3","type":"journal-article","created":{"date-parts":[[2023,10,26]],"date-time":"2023-10-26T15:01:40Z","timestamp":1698332500000},"page":"5681-5689","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Postoperative quadriceps weakness and male sex are risk factors for patellofemoral articular cartilage lesions after anatomical anterior cruciate ligament reconstruction"],"prefix":"10.1002","volume":"31","author":[{"given":"Ryo","family":"Murakami","sequence":"first","affiliation":[{"name":"Department of Orthopaedic Surgery Faculty of Medicine The University of Tokyo 7\u20103\u20101 Hongo, Bunkyo\u2010Ku 113\u20108655 Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shuji","family":"Taketomi","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Faculty of Medicine The University of Tokyo 7\u20103\u20101 Hongo, Bunkyo\u2010Ku 113\u20108655 Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ryota","family":"Yamagami","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Faculty of Medicine The University of Tokyo 7\u20103\u20101 Hongo, Bunkyo\u2010Ku 113\u20108655 Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kenichi","family":"Kono","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Faculty of Medicine The University of Tokyo 7\u20103\u20101 Hongo, Bunkyo\u2010Ku 113\u20108655 Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kohei","family":"Kawaguchi","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Faculty of Medicine The University of Tokyo 7\u20103\u20101 Hongo, Bunkyo\u2010Ku 113\u20108655 Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tomofumi","family":"Kage","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Faculty of Medicine The University of Tokyo 7\u20103\u20101 Hongo, Bunkyo\u2010Ku 113\u20108655 Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takahiro","family":"Arakawa","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Faculty of Medicine The University of Tokyo 7\u20103\u20101 Hongo, Bunkyo\u2010Ku 113\u20108655 Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroshi","family":"Inui","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Faculty of Medicine The University of Tokyo 7\u20103\u20101 Hongo, Bunkyo\u2010Ku 113\u20108655 Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sakae","family":"Tanaka","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Faculty of Medicine The University of Tokyo 7\u20103\u20101 Hongo, Bunkyo\u2010Ku 113\u20108655 Tokyo 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May 2023","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"11 October 2023","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"26 October 2023","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Dr.Shuji Taketomi reports grants to his laboratory from Smith & Nephew, Stryker, and Zimmer Biomet; payment for expert testimony from Smith & Nephew and Arthrex, payment or honoraria for lectures from Smith & Nephew and Arthrex; and outside the submitted work. Other authors declare that they have no conflict of interest.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"This retrospective study was approved by the institutional review board of the University of Tokyo (IRB No: 2674).","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}},{"value":"Informed consent was obtained from all individual participants included in this study.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Informed consent"}}]}}