title: A ten- to 15-year follow-up observation of high tibial osteotomy in medial compartment osteoarthrosis.
abstract: High tibial osteotomy (HTO) was performed on 86 medially osteoarthritic knees in 78 patients. Twelve patients died during the follow-up period. Fifty-six knees of 51 patients were evaluated twice postoperatively: once at six years after surgery and again after ten to 15 years. Results were satisfactory in 88% of the knees at the six-year follow-up evaluation and in 63% at the post-ten-year follow-up evaluation. Ten-year follow-up results significantly deteriorated. The femorotibial angle (FTA) at the time of bone union after HTO was a significant factor that contributed to the ten-year results. In patients maintaining excellent improvement of knee function at the post-ten-year follow-up evaluation, the mean FTA at one year after surgery was 165 degrees; this value was constant through ten years after HTO. An FTA of 164 degrees-168 degrees should be attained to ensure favorable long-term results in HTO.
authors.affiliation: Department of Orthopaedic Surgery, Hokkaido University School of Medicine, Sapporo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Yasuda
authors.forename: T
authors.initials: T
authors.lastname: Majima
authors.forename: T
authors.initials: T
authors.lastname: Tsuchida
authors.forename: K
authors.initials: K
authors.lastname: Kaneda
mesh_terms: D001858:Bone Nails; D016267:External Fixators; D005500:Follow-Up Studies; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000503:physiopathology; D010003:Osteoarthritis / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000503:physiopathology / Q000601:surgery*; D010027:Osteotomy / Q000379:methods / Q000706:statistics & numerical data; D011379:Prognosis; D011859:Radiography; D013977:Tibia / Q000601:surgery*; D013997:Time Factors; D016138:Walking