{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,1]],"date-time":"2025-11-01T17:24:14Z","timestamp":1762017854497},"reference-count":23,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2015,6,1]],"date-time":"2015-06-01T00:00:00Z","timestamp":1433116800000},"content-version":"vor","delay-in-days":31,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Orthopaedic Surgery"],"published-print":{"date-parts":[[2015,5]]},"abstract":"Objective<\/jats:title>To explore the outcome and surgical technique of minimally invasive unicompartmental knee arthroplasty (UKA<\/jats:styled-content>) for spontaneous osteonecrosis of the knee.<\/jats:p><\/jats:sec>Methods<\/jats:title>Twenty\u2010seven patients with medial compartmental spontaneous osteonecrosis treated by minimally invasive Oxford phase 3 UKA<\/jats:styled-content> from J<\/jats:styled-content>anuary 2009 to J<\/jats:styled-content>une 2013 were reviewed retrospectively. Twelve subjects were men and 15 women, with an average age of 64.6 \u00b1 8.6 years (52\u201382 years). At the time of diagnosis, 11 patients had with grade III<\/jats:styled-content> necrosis and 16 grade IV<\/jats:styled-content> according to M<\/jats:styled-content>ont's classification. Pain, range of motion (ROM<\/jats:styled-content>) and Hospital for Special Surgery (HSS<\/jats:styled-content>) knee scores were evaluated before and after UKA<\/jats:styled-content>. Pre\u2010and postoperative alignment of the lower limbs was measured and compared. Postoperative radiographic assessments were made according to the guidelines proposed by the Oxford group at the final follow\u2010up.<\/jats:p><\/jats:sec>Results<\/jats:title>All patients were followed for a mean time of 27.8 \u00b1 15.9 months (6\u201359 months). There were no serious adverse events, such as infection, bearing dislocation, aseptic loosening, pulmonary embolism, deep venous thrombosis, cardio\u2010cerebral vascular incident or psychological problems. One revision was required for unrelated causes (fracture of tibia plateau) 3 years after arthroplasty. One femoral component was tilted with a postoperative radiographic angle >10\u00b0. One radiolucent line was observed in a patient with spontaneous osteonecrosis of the knee. The two patients with implant failure had no symptoms at last follow\u2010up. Visual analogue scale scores decreased from 6.9 \u00b1 0.9 to 2.0 \u00b1 1.1 (t<\/jats:italic> = 19.27, P<\/jats:italic> = 0.00). Pain was relieved in 96.3% of subjects (26\/27). The mean post\u2010operative ROM<\/jats:styled-content> and femorotibial angle were 125.7\u00b0 \u00b1 9.6\u00b0 and 177.7\u00b0 \u00b1 3.1\u00b0, respectively. HSS<\/jats:styled-content> scores increased from 61.3 \u00b1 9.7 to 93.0 \u00b1 4.8 (t<\/jats:italic> = 14.46, P<\/jats:italic> = 0.00). Of the 27 patients, 26 (96.3%) were satisfied with the outcome of this surgical procedure.<\/jats:p><\/jats:sec>Conclusion<\/jats:title>Minimally invasive UKA<\/jats:styled-content> is an effective means of managing spontaneous osteonecrosis of the knee. The short\u2010term outcome of UKA<\/jats:styled-content> is encouraging.<\/jats:p><\/jats:sec>","DOI":"10.1111\/os.12172","type":"journal-article","created":{"date-parts":[[2015,6,1]],"date-time":"2015-06-01T06:44:26Z","timestamp":1433141066000},"page":"119-124","source":"Crossref","is-referenced-by-count":16,"title":["Minimally Invasive Unicompartmental Knee Arthroplasty for Spontaneous Osteonecrosis of the Knee"],"prefix":"10.1111","volume":"7","author":[{"given":"Wan\u2010shou","family":"Guo","sequence":"first","affiliation":[{"name":"Department of Joint Surgery China\u2010Japan Friendship Hospital Beijing China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qi\u2010dong","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Joint Surgery China\u2010Japan Friendship Hospital Beijing China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhao\u2010hui","family":"Liu","sequence":"additional","affiliation":[{"name":"Department 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