{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,24]],"date-time":"2026-03-24T07:58:04Z","timestamp":1774339084592,"version":"3.50.1"},"reference-count":28,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2014,11,22]],"date-time":"2014-11-22T00:00:00Z","timestamp":1416614400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2014,11,22]],"date-time":"2014-11-22T00:00:00Z","timestamp":1416614400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/www.springer.com\/tdm"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"published-print":{"date-parts":[[2016,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>To determine the medium\u2010term implant survivorship, the clinical results and the failure mechanisms of a novel unicompartmental arthroplasty for uncemented resurfacing of the medial tibio\u2010femoral compartment.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Seventy\u2010six consecutive patients were prospectively evaluated with a mean final follow\u2010up of 6 years (SD 5.3\u00a0months). In 44 patients, the diagnosis was osteoarthritis, and in 32 patients, it was avascular necrosis of the medial femoral condyle. The Hospital for Special Surgery Score was used for objective clinical evaluation, and a self\u2010administered visual analogue scale was used to quantify residual pain at each observation point. Implant survivorship was determined assuming revision for any reason as endpoint.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Nineteen patients were revised (6 with osteoarthritis and 13 with avascular necrosis of the medial femoral condyle). The mean interval time from index surgery to revision was 11.2\u00a0months (SD 4.66\u00a0months). Implant survivorship was higher in patients with osteoarthritis with respect to those with avascular necrosis of the medial femoral condyle (<jats:italic>p<\/jats:italic> = 0.018). Aseptic loosening was the most frequent failure mechanism. Femoral component loosening was reported in five patients and tibial component loosening was reported in other six patients. Assuming revision for any reason as endpoint, an implant survivorship of 74.3 % at 6\u2010year follow\u2010up was determined. In the remaining 57 patients, satisfactory clinical results were obtained. Hospital for Special Surgery Score and visual analogue scale for residual pain showed significant improvements (<jats:italic>p<\/jats:italic> &lt; 0.03 and <jats:italic>p<\/jats:italic> &lt; 0.045, respectively).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>At the present time, the standard cemented implants and the conventional designs for unicompartmental knee replacement still represent the optimal solution. The authors do not recommend the widespread use of this technique.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of evidence<\/jats:title><jats:p>IV.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00167-014-3444-0","type":"journal-article","created":{"date-parts":[[2014,11,21]],"date-time":"2014-11-21T12:28:54Z","timestamp":1416572934000},"page":"3175-3182","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["High rate of implant loosening for uncemented resurfacing\u2010type medial unicompartmental knee arthroplasty"],"prefix":"10.1002","volume":"24","author":[{"given":"Danilo","family":"Bruni","sequence":"first","affiliation":[{"name":"2nd Orthopaedics and Traumatologic Clinic Rizzoli Orthopaedic Institute Via Pupilli 1 40136 Bologna Italy"},{"name":"Biomechanics and Technologic Innovation Laboratory Codivilla\u2010Putti Research Center Via di Barbiano 1\/10 40136 Bologna Italy"},{"name":"Bologna University Bologna Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stefano","family":"Zaffagnini","sequence":"additional","affiliation":[{"name":"2nd Orthopaedics and Traumatologic Clinic Rizzoli Orthopaedic Institute Via Pupilli 1 40136 Bologna Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Francesco","family":"Iacono","sequence":"additional","affiliation":[{"name":"2nd Orthopaedics and Traumatologic Clinic Rizzoli Orthopaedic Institute Via Pupilli 1 40136 Bologna Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Laura","family":"Bragonzoni","sequence":"additional","affiliation":[{"name":"Biomechanics and Technologic Innovation Laboratory Codivilla\u2010Putti Research Center Via di Barbiano 1\/10 40136 Bologna Italy"},{"name":"Bologna University Bologna Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mirco","family":"Lo Presti","sequence":"additional","affiliation":[{"name":"2nd Orthopaedics and Traumatologic Clinic Rizzoli Orthopaedic Institute Via Pupilli 1 40136 Bologna Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maria Pia","family":"Neri","sequence":"additional","affiliation":[{"name":"2nd Orthopaedics and Traumatologic Clinic Rizzoli Orthopaedic Institute Via Pupilli 1 40136 Bologna Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Giulio Maria","family":"Marcheggiani Muccioli","sequence":"additional","affiliation":[{"name":"2nd Orthopaedics and Traumatologic Clinic Rizzoli Orthopaedic Institute Via Pupilli 1 40136 Bologna Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marco","family":"Nitri","sequence":"additional","affiliation":[{"name":"2nd Orthopaedics and Traumatologic Clinic Rizzoli Orthopaedic Institute Via Pupilli 1 40136 Bologna Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Giovanni","family":"Raspugli","sequence":"additional","affiliation":[{"name":"2nd Orthopaedics and Traumatologic Clinic Rizzoli Orthopaedic Institute Via Pupilli 1 40136 Bologna Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maurilio","family":"Marcacci","sequence":"additional","affiliation":[{"name":"2nd Orthopaedics and Traumatologic Clinic Rizzoli Orthopaedic Institute Via Pupilli 1 40136 Bologna Italy"},{"name":"Biomechanics and Technologic Innovation Laboratory Codivilla\u2010Putti Research Center Via di Barbiano 1\/10 40136 Bologna Italy"},{"name":"Bologna University Bologna Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2014,11,22]]},"reference":[{"key":"e_1_2_7_2_1","unstructured":"Ahlb\u00e4ckSOsteoarthrosis of the knee.A radiographic investigation. 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