{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,1]],"date-time":"2026-04-01T08:48:55Z","timestamp":1775033335277,"version":"3.50.1"},"reference-count":40,"publisher":"British Editorial Society of Bone & Joint Surgery","issue":"7","license":[{"start":{"date-parts":[[2012,7,1]],"date-time":"2012-07-01T00:00:00Z","timestamp":1341100800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/online.boneandjoint.org.uk\/TDM"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["The Journal of Bone and Joint Surgery. British volume"],"published-print":{"date-parts":[[2012,7]]},"abstract":"<jats:p>Peri-prosthetic patellar fracture following resurfacing as part of total knee replacement (TKR) is an infrequent yet challenging complication. This case-control study was performed to identify clinical, radiological and surgical factors that increase the risk of developing a spontaneous patellar fracture after TKR. Patellar fractures were identified in 74 patients (88 knees) from a series of 7866 consecutive TKRs conducted between 1998 and 2009. After excluding those with a previous history of extensor mechanism realignment or a clear traumatic event, a metal-backed patella, any uncemented component or subsequent infection, the remaining 64 fractures were compared with a matched group of TKRs with an excellent outcome defined by the Knee Society score. The mean age of patients with a fracture was 70 years (51 to 81) at the time of TKR. Patellar fractures were detected at a mean of 13.4 months (2 to 84) after surgery. The incidence of patellar fracture was found to be strongly associated with the number of previous knee operations, greater pre-operative mechanical malalignment, smaller post-operative patellar tendon length, thinner post-resection patellar thickness, and a lower post-operative Insall-Salvati ratio.<\/jats:p><jats:p>An understanding of the risk factors associated with spontaneous patellar fracture following TKR provides a valuable insight into prevention of this challenging complication.<\/jats:p>","DOI":"10.1302\/0301-620x.94b7.28552","type":"journal-article","created":{"date-parts":[[2012,6,25]],"date-time":"2012-06-25T13:21:11Z","timestamp":1340630471000},"page":"908-913","source":"Crossref","is-referenced-by-count":18,"title":["A case-control study of spontaneous patellar fractures following primary total knee replacement"],"prefix":"10.1302","volume":"94-B","author":[{"given":"J. G.","family":"Seo","sequence":"first","affiliation":[{"name":"Samsung Medical Center, Department of Orthopaedic Surgery, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangsam-gu, Seoul 135-710, Korea."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Y. W.","family":"Moon","sequence":"additional","affiliation":[{"name":"Samsung Medical Center, Department of Orthopaedic Surgery, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangsam-gu, Seoul 135-710, Korea."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S. H.","family":"Park","sequence":"additional","affiliation":[{"name":"Samsung Medical Center, Department of Orthopaedic Surgery, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangsam-gu, Seoul 135-710, Korea."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J. H.","family":"Lee","sequence":"additional","affiliation":[{"name":"Samsung Medical Center, Department of Orthopaedic Surgery, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangsam-gu, Seoul 135-710, Korea."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"H. M.","family":"Kang","sequence":"additional","affiliation":[{"name":"Samsung Medical Center, Department of Orthopaedic Surgery, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangsam-gu, Seoul 135-710, Korea."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S. M.","family":"Kim","sequence":"additional","affiliation":[{"name":"Pusan National University Yangsan Hospital, Department of Orthopaedic Surgery, Pusan National University School of Medicine, Beomeo-ri, Mulgeum-eup, Yangsan 626-770, Korea."}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"42","reference":[{"key":"r1","doi-asserted-by":"publisher","DOI":"10.1016\/j.injury.2007.02.054"},{"key":"r2","doi-asserted-by":"publisher","DOI":"10.1097\/01.blo.0000092992.90435.20"},{"key":"r3","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-200204000-00004"},{"key":"r4","doi-asserted-by":"publisher","DOI":"10.1097\/01.blo.0000218722.83601.18"},{"key":"r5","doi-asserted-by":"publisher","DOI":"10.1016\/S0883-5403(05)80127-5"},{"key":"r6","doi-asserted-by":"publisher","DOI":"10.1016\/S0883-5403(87)80020-7"},{"key":"r7","doi-asserted-by":"publisher","DOI":"10.1097\/01.blo.0000188559.74796.69"},{"key":"r8","first-page":"168","author":"Grace JN","year":"1988","journal-title":"Clin Orthop Relat Res"},{"key":"r9","first-page":"131","volume":"299","author":"Tria AJ Jr","year":"1994","journal-title":"Clin Orthop Relat Res"},{"key":"r10","doi-asserted-by":"crossref","first-page":"152","DOI":"10.1097\/00003086-198210000-00020","volume":"170","author":"Clayton ML","year":"1982","journal-title":"Clin Orthop Relat Res"},{"key":"r11","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-198971070-00009"},{"key":"r12","doi-asserted-by":"crossref","first-page":"123","DOI":"10.1097\/00003086-198210000-00016","volume":"170","author":"Insall JN","year":"1982","journal-title":"Clin Orthop Relat Res"},{"key":"r13","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-200111000-00012"},{"key":"r14","doi-asserted-by":"crossref","first-page":"2195","DOI":"10.2106\/00004623-200710000-00014","volume":"89","author":"Pierson JL","year":"2007","journal-title":"J Bone Joint Surg [Am]"},{"key":"r15","doi-asserted-by":"crossref","first-page":"106","DOI":"10.1097\/00003086-198811000-00012","volume":"236","author":"Rosenberg AG","year":"1988","journal-title":"Clin Orthop Relat Res"},{"key":"r16","doi-asserted-by":"publisher","DOI":"10.1016\/S0030-5898(05)70083-3"},{"key":"r17","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2004.02.009"},{"key":"r18","doi-asserted-by":"crossref","first-page":"395","DOI":"10.3928\/0147-7447-19990401-08","volume":"22","author":"Le AX","year":"1999","journal-title":"Orthopedics"},{"key":"r19","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-199910000-00018"},{"key":"r20","doi-asserted-by":"crossref","first-page":"13","DOI":"10.1097\/00003086-198911000-00004","volume":"248","author":"Insall JN","year":"1989","journal-title":"Clin Orthop Relat Res"},{"key":"r21","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2005.09.004"},{"key":"r22","first-page":"76","volume":"120","author":"Ranawat CS","year":"1976","journal-title":"Clin Orthop Relat Res"},{"key":"r23","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-011-1597-7"},{"key":"r24","doi-asserted-by":"crossref","first-page":"170","DOI":"10.1097\/00003086-199209000-00022","volume":"282","author":"Grelsamer RP","year":"1992","journal-title":"Clin Orthop Relat Res"},{"key":"r25","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2007.10.005"},{"key":"r26","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-198668070-00009"},{"key":"r27","doi-asserted-by":"publisher","DOI":"10.1054\/arth.2002.34826"},{"key":"r28","first-page":"115","volume":"3","author":"Goldberg VM","year":"1988","journal-title":"Clin Orthop Relat Res"},{"key":"r29","doi-asserted-by":"publisher","DOI":"10.1016\/j.knee.2007.01.002"},{"key":"r30","doi-asserted-by":"publisher","DOI":"10.1097\/01.blo.0000214421.21712.62"},{"key":"r31","doi-asserted-by":"publisher","DOI":"10.1007\/s11420-009-9118-7"},{"key":"r32","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-200412000-00013"},{"key":"r33","doi-asserted-by":"publisher","DOI":"10.1054\/arth.2001.22250"},{"key":"r34","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-200107000-00016"},{"key":"r35","doi-asserted-by":"publisher","DOI":"10.12659\/MSM.881770"},{"key":"r36","doi-asserted-by":"publisher","DOI":"10.1016\/j.ejrad.2007.04.018"},{"key":"r37","doi-asserted-by":"crossref","first-page":"147","DOI":"10.1097\/00003086-198210000-00019","volume":"170","author":"Scott RD","year":"1982","journal-title":"Clin Orthop Relat Res"},{"key":"r38","doi-asserted-by":"publisher","DOI":"10.1016\/S0883-5403(96)80163-X"},{"key":"r39","doi-asserted-by":"publisher","DOI":"10.1016\/S0883-5403(88)80049-4"},{"key":"r40","doi-asserted-by":"publisher","DOI":"10.1016\/S0966-6362(00)00060-6"}],"container-title":["The Journal of Bone and Joint Surgery. British volume"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/online.boneandjoint.org.uk\/doi\/pdf\/10.1302\/0301-620X.94B7.28552","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/online.boneandjoint.org.uk\/doi\/full-xml\/10.1302\/0301-620X.94B7.28552","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/online.boneandjoint.org.uk\/doi\/pdf\/10.1302\/0301-620X.94B7.28552","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2022,1,19]],"date-time":"2022-01-19T13:00:40Z","timestamp":1642597240000},"score":1,"resource":{"primary":{"URL":"https:\/\/online.boneandjoint.org.uk\/doi\/10.1302\/0301-620X.94B7.28552"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,7]]},"references-count":40,"journal-issue":{"issue":"7","published-print":{"date-parts":[[2012,7]]}},"alternative-id":["10.1302\/0301-620X.94B7.28552"],"URL":"https:\/\/doi.org\/10.1302\/0301-620x.94b7.28552","relation":{},"ISSN":["0301-620X","2044-5377"],"issn-type":[{"value":"0301-620X","type":"print"},{"value":"2044-5377","type":"electronic"}],"subject":[],"published":{"date-parts":[[2012,7]]}}}