{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,2]],"date-time":"2026-06-02T01:32:49Z","timestamp":1780363969901,"version":"3.54.1"},"reference-count":28,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2025,9,8]],"date-time":"2025-09-08T00:00:00Z","timestamp":1757289600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"},{"start":{"date-parts":[[2025,9,8]],"date-time":"2025-09-08T00:00:00Z","timestamp":1757289600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"},{"start":{"date-parts":[[2025,9,8]],"date-time":"2025-09-08T00:00:00Z","timestamp":1757289600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2025,9,8]],"date-time":"2025-09-08T00:00:00Z","timestamp":1757289600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/legal\/tdmrep-license"},{"start":{"date-parts":[[2025,9,2]],"date-time":"2025-09-02T00:00:00Z","timestamp":1756771200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/100011549","name":"American Orthopaedic Society for Sports Medicine","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100011549","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100009885","name":"American Academy of Orthopaedic Surgeons","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100009885","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["arthroscopysportsmedicineandrehabilitation.org","elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["Arthroscopy, Sports Medicine, and Rehabil."],"published-print":{"date-parts":[[2025,12]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>To assess the outcomes of patellar osteochondral allograft (OCA) transplantation and access the effect of preoperative indications and patient characteristics on outcomes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      Primary patellar OCA transplantation cases were retrospectively identified from a single surgeon from August 2017 and August 2021, all using grafts preserved with the Missouri Osteochondral Allograft Preservation technique. Patients with less than 2 years of follow\u2010up were excluded. Variables collected included demographics, previous surgical and concomitant procedures, primary pathology and indications, graft size and location, range of motion, Magnetic Resonance Observation of Cartilage Repair Tissue 2.0 scores, patient\u2010reported outcome measures, and reoperations. Primary pathology and unipolar versus bipolar grafting subgroups were analyzed. Preoperative and postoperative comparison was analyzed via paired sample\n                      <jats:italic>t<\/jats:italic>\n                      tests. Subgroups were compared using independent\n                      <jats:italic>t<\/jats:italic>\n                      tests for nonpaired continuous variables, with \u03c7\n                      <jats:sup>2<\/jats:sup>\n                      and Fisher exact tests used for categorical data. Statistical significance was set at\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .05.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Twenty\u2010eight cases (16 unipolar patellar OCA transplantation, 12 bipolar transplantation) met both inclusion and exclusion criteria, with a mean age of 31.0 \u00b1 10.3 years, a mean body mass index of 30.0 \u00b1 5.6, and a mean follow\u2010up of 3.6 \u00b1 1.4 years (range 2.3\u20105.8 years). Eighteen knees presented with lateral patellar instability, 9 with patellofemoral (PF) chondrosis, and 1 with juvenile osteochondritis dissecans. Three knees (10.7%) in total were converted to total knee arthroplasty, all of which occurred in the setting of PF chondrosis. OCA transplantation improved International Knee Documentation Committee (IKDC; 36.6\u201071.9;\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .001), Knee Injury and Osteoarthritis Outcome Score for Joint Replacement (49.8\u201077.5;\n                      <jats:italic>P<\/jats:italic>\n                      = .001), Short\u2010Form 12 Physical Health Survey (33.5\u201045.3;\n                      <jats:italic>P<\/jats:italic>\n                      = .002), and Veterans RAND 12 Physical Health Survey (34.5\u201049.6;\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .001) scores at 2\u2010years. The IKDC, Knee Injury and Osteoarthritis Outcome Score for Joint Replacement, Short\u2010Form 12 Physical Health Survey, and Veterans RAND 12 Physical Health Survey thresholds (0\u2010100) and percentages for achieving minimal clinically important difference were 18.75 (70.6%), 18.76 (73.5%), 11.90 (73.5%), and 13.56 (61.8%), respectively. Age and body mass index had strong negative correlations with IKDC scores in knees with PF chondrosis (r = \u22120.903;\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .01 and r = \u22120.875;\n                      <jats:italic>P<\/jats:italic>\n                      = .010 respectively). Bipolar transplantation for \u201ckissing\u201d lesions had larger improvements in IKDC scores than unipolar cases (+54.6 vs +24.1;\n                      <jats:italic>P<\/jats:italic>\n                      = .007).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Patellar OCA transplantation resulted in overall improvement in PROs with an 11% rate of conversion to total knee arthroplasty at 2\u2010years follow\u2010up.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence<\/jats:title>\n                    <jats:p>Level IV, therapeutic retrospective case series.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1016\/j.asmr.2025.101257","type":"journal-article","created":{"date-parts":[[2025,9,9]],"date-time":"2025-09-09T06:59:50Z","timestamp":1757401190000},"update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":1,"title":["Patellar Osteochondral Allograft Transplantation Yields Clinically Meaningful Improvement in 2\u2010Year Patient\u2010Reported Outcomes"],"prefix":"10.1002","volume":"7","author":[{"given":"Nathaniel M.","family":"Tchangou","sequence":"first","affiliation":[{"name":"Rothman Orthopaedic Institute Philadelphia Pennsylvania U.S.A."},{"name":"Drexel University College of Medicine Philadelphia Pennsylvania U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christopher A.","family":"Schneble","sequence":"additional","affiliation":[{"name":"Rothman Orthopaedic Institute Philadelphia Pennsylvania U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Randal 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