title: Clinical and radiographic outcomes of medial open-wedge high tibial osteotomy with Anthony-K plate: prospective minimum five year follow-up data.
abstract: The purpose of this study was to prospectively evaluate the clinical and radiographic outcomes, and complication rates, after a minimum of five years of follow-up after medial open wedge high tibial osteotomy (MOWHTO) using an Anthony-K plate.
  
  
  
  MOWHTO was performed on 35 knees of 34 consecutive patients. A visual analogue scale (VAS), and Western Ontario and McMaster University Osteoarthritis (WOMAC) and Lysholm scores, were used in clinical evaluation. Upon radiographic assessment, alignment was expressed as the femorotibial angle (FTA). The posterior tibial slope (PTS) and the Insall-Salvati Index (ISI) were also measured.
  
  
  
  VAS, WOMAC, and Lysholm scores improved significantly upon follow-up (p < 0.001 for all). The overall mean FTA was 4.68 ± 4.39° varus pre-operatively; at the last post-operative follow-up, the value was 8.43 ± 2.02° valgus. The mean correction angle was 13.1 ± 2.7°. A significant increase in PTS was evident (p < 0.01), as was a significant decrease in the ISI (p < 0.01). The overall complication rate was 8.6 %.
  
  
  
  The Anthony-K plate affords accurate correction, initially stabilises the osteotomy after surgery, and maintains such stability until the osteotomy gap is completely healed, without correction loss. The plate survival rate was 97.2 % after a minimum of five years of follow-up. The plate increased the PTS, as do other medial osteotomy fixation plates.
authors.affiliation: Department of Orthopaedic Surgery, Harran University Faculty of Medicine, Yenisehir, 63100, Sanliurfa, Turkey. maltay63@yahoo.com.
authors.forename: Mehmet Akif
authors.initials: MA
authors.lastname: Altay
authors.affiliation: Department of Orthopaedic Surgery, Harran University Faculty of Medicine, Yenisehir, 63100, Sanliurfa, Turkey.
authors.forename: Cemil
authors.initials: C
authors.lastname: Ertürk
authors.affiliation: Department of Anesthesiology and Reanimation, Harran University Faculty of Medicine, Sanliurfa, Turkey.
authors.forename: Nuray
authors.initials: N
authors.lastname: Altay
authors.affiliation: Department of Orthopaedic Surgery, Educational and Training Hospital, Sanliurfa, Turkey.
authors.forename: Ahmet Şükrü
authors.initials: AŞ
authors.lastname: Mercan
authors.affiliation: Department of Orthopaedic Surgery, Harran University Faculty of Medicine, Yenisehir, 63100, Sanliurfa, Turkey.
authors.forename: Serkan
authors.initials: S
authors.lastname: Sipahioğlu
authors.affiliation: Department of Orthopaedic Surgery, Kahramanmaras Sutcu Imam University Faculty of Medicine, Kahramanmaras, Turkey.
authors.forename: Ali Murat
authors.initials: AM
authors.lastname: Kalender
authors.affiliation: Department of Orthopaedic Surgery, Harran University Faculty of Medicine, Yenisehir, 63100, Sanliurfa, Turkey.
authors.forename: Uğur Erdem
authors.initials: UE
authors.lastname: Işıkan
mesh_terms: D000328:Adult; D000368:Aged; D001860:Bone Plates / Q000009:adverse effects*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007719:Knee Joint / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery*; D010027:Osteotomy / Q000009:adverse effects / Q000379:methods*; D010147:Pain Measurement; D011183:Postoperative Complications; D011446:Prospective Studies; D013977:Tibia / Q000601:surgery*; D016896:Treatment Outcome
keywords: High tibial osteotomy; Knee; Medial open wedge osteotomy; Osteoarthritis; Tibial slope; Varus deformity