{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T14:49:38Z","timestamp":1787755778238,"version":"build-2784847793"},"reference-count":28,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"19","content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2025,10,1]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>There are limited long-term data on the results of conversion of a surgically or spontaneously fused knee to a total knee arthroplasty (TKA) in the literature. The purpose of this study was to determine the long-term (minimum, 21-year) results of TKA in a fused knee.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>We reviewed the results of 95 TKAs in the fused knees of 93 patients (mean age, 41.9 \u00b1 9.4 years; range, 23 to 62 years) using a TKA system. The mean follow-up was 25.1 years (range, 21 to 31 years).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>The mean Knee Society score was 88 points (range, 56 to 96 points) at the final follow-up. The mean range of motion was 76.4\u00b0 (range, 0\u00b0 to 105\u00b0). Nine knees (9%) required revision for aseptic loosening of TKA components. One knee (1%) was revised for pyogenic infection, and another knee was revised for recurrent tuberculous infection. Approximately 80% of patients were satisfied with the TKA. Approximately 67% of patients reported that their quality of life improved greatly after TKA. Kaplan-Meier survivorship, with revision for failure as the end point, was 88.4% (95% confidence interval, 83% to 97%) at 25.1 years postoperatively.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions:<\/jats:title>\n                    <jats:p>Conversion of a fused knee to TKA resulted in good long-term fixation and high satisfaction.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence:<\/jats:title>\n                    <jats:p>\n                      Therapeutic\n                      <jats:underline>Level IV<\/jats:underline>\n                      . See Instructions for Authors for a complete description of levels of evidence.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.2106\/jbjs.25.00149","type":"journal-article","created":{"date-parts":[[2025,8,14]],"date-time":"2025-08-14T18:01:47Z","timestamp":1755194507000},"page":"2178-2184","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":1,"title":["Conversion of Fused Knees to Total Knee Arthroplasty"],"prefix":"10.2106","volume":"107","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2090-7315","authenticated-orcid":false,"given":"Young-Hoo","family":"Kim","sequence":"first","affiliation":[{"name":"The Joint Replacement Center of the Seoul Metropolitan Government, SeoNam Hospital, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6269-6451","authenticated-orcid":false,"given":"Jang-Won","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Ewha Womans University Seoul Hospital, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3586-9446","authenticated-orcid":false,"given":"Young-Soo","family":"Jang","sequence":"additional","affiliation":[{"name":"The Joint Replacement Center of the Seoul Metropolitan Government, SeoNam Hospital, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8617-2417","authenticated-orcid":false,"given":"Eun-Jung","family":"Kim","sequence":"additional","affiliation":[{"name":"The Joint Replacement Center of the Seoul Metropolitan Government, SeoNam Hospital, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","published-online":{"date-parts":[[2025,8,14]]},"reference":[{"issue":"4","key":"bib1-20251001","doi-asserted-by":"crossref","first-page":"453","DOI":"10.1054\/arth.2000.4640","article-title":"Total knee arthroplasty after spontaneous osseous ankylosis and takedown of formal knee fusion","volume":"15","author":"Kim","year":"2000","journal-title":"J Arthroplasty."},{"issue":"6","key":"bib2-20251001","doi-asserted-by":"crossref","first-page":"768","DOI":"10.1054\/arth.2001.24375","article-title":"Total knee arthroplasty after formal knee fusion using unconstrained and semiconstrained components: a report of 7 cases","volume":"16","author":"Henkel","year":"2001","journal-title":"J Arthroplasty."},{"issue":"3","key":"bib3-20251001","first-page":"347","article-title":"Total knee arthroplasty after former knee fusion in a patient with Ehlers Danlos syndrome","volume":"79","author":"Cermak","year":"2013","journal-title":"Acta Orthop Belg."},{"issue":"6","key":"bib4-20251001","first-page":"347","article-title":"Conversion of formal knee fusion to total knee arthroplasty","volume":"23","author":"Lien","year":"2003","journal-title":"J Med Sci."},{"issue":"9","key":"bib5-20251001","doi-asserted-by":"crossref","first-page":"1322","DOI":"10.2106\/00004623-198870090-00008","article-title":"Total knee arthroplasty for tuberculous arthritis","volume":"70","author":"Kim","year":"1988","journal-title":"J Bone Joint Surg Am."},{"issue":"6","key":"bib6-20251001","doi-asserted-by":"crossref","first-page":"1047","DOI":"10.2106\/00004623-200306000-00009","article-title":"Conversion of a fused knee with use of a posterior stabilized total knee prosthesis","volume":"85","author":"Kim","year":"2003","journal-title":"J Bone Joint Surg Am."},{"issue":"2","key":"bib7-20251001","doi-asserted-by":"crossref","first-page":"296","DOI":"10.1302\/0301-620X.81B2.0810296","article-title":"Total knee arthroplasty in bony ankylosis in gross flexion","volume":"81","author":"Kim","year":"1999","journal-title":"J Bone Joint Surg Br."},{"issue":"3","key":"bib8-20251001","doi-asserted-by":"crossref","first-page":"370","DOI":"10.1080\/00016470510030841","article-title":"Conversion of knee fusion to total arthroplasty: complications in 8 patients","volume":"76","author":"Clemens","year":"2005","journal-title":"Acta Orthop."},{"issue":"3","key":"bib9-20251001","doi-asserted-by":"crossref","first-page":"455","DOI":"10.2106\/00004623-199072030-00024","article-title":"Total knee replacement after spontaneous osseous ankylosis. 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