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We analysed the clinical and radiological results of a new coronal osteotomy involving thinning of the patella in a selected group of patients with isolated patellofemoral osteoarthritis. Since 1991, 31 patients (35 knees) have been treated, of whom 34 were available for follow-up at a mean of 9.1 years. The Knee Society Score, the Patellar score and the Short-form-36 questionnaire were used for clinical evaluation. We also examined the radiological features to confirm bone consolidation and assess the progression of osteoarthritis. A significant improvement in the functional scores and radiological parameters was noted. All patients except one were satisfied with the operation. Radiological progression of the patellofemoral osteoarthritis was slowed but radiological femorotibial osteoarthritis progressed in 23 (65%) cases, with a total knee replacement becoming necessary in four cases without technical problems in resurfacing the patella. We compared the results with other forms of surgical treatment reported in the literature. <\/jats:p><jats:p> This treatment offers good clinical and radiological results, presenting an alternative method of managing patellofemoral osteoarthritis. <\/jats:p>","DOI":"10.1302\/0301-620x.92b10.24854","type":"journal-article","created":{"date-parts":[[2010,9,30]],"date-time":"2010-09-30T23:19:46Z","timestamp":1285888786000},"page":"1385-1391","source":"Crossref","is-referenced-by-count":4,"title":["The patellar thinning osteotomy in patellofemoral arthritis"],"prefix":"10.1302","volume":"92-B","author":[{"given":"J.","family":"Vaquero","sequence":"first","affiliation":[{"name":"Hospital G. Mara\u00f1on, Doctor Esquerdo 46, 28007 Madrid, Spain."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J. A.","family":"Calvo","sequence":"additional","affiliation":[{"name":"Hospital G. 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