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Clinical and radiographic outcomes of medial open-wedge high tibial osteotomy with Anthony-K plate: prospective minimum five year follow-up data

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Abstract

Purpose

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.

Methods

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.

Results

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 %.

Conclusions

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.

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Acknowledgments

The authors state that they had no funding or any conflicts of interest, which may have produced a bias in the preparation of the manuscript.

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Authors and Affiliations

  1. Department of Orthopaedic Surgery, Harran University Faculty of Medicine, Yenisehir, 63100, Sanliurfa, Turkey

    Mehmet Akif Altay, Cemil Ertürk, Serkan Sipahioğlu & Uğur Erdem Işıkan

  2. Department of Anesthesiology and Reanimation, Harran University Faculty of Medicine, Sanliurfa, Turkey

    Nuray Altay

  3. Department of Orthopaedic Surgery, Educational and Training Hospital, Sanliurfa, Turkey

    Ahmet Şükrü Mercan

  4. Department of Orthopaedic Surgery, Kahramanmaras Sutcu Imam University Faculty of Medicine, Kahramanmaras, Turkey

    Ali Murat Kalender

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  1. Mehmet Akif Altay
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  2. Cemil Ertürk
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Correspondence to Mehmet Akif Altay.

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Altay, M.A., Ertürk, C., Altay, N. et al. Clinical and radiographic outcomes of medial open-wedge high tibial osteotomy with Anthony-K plate: prospective minimum five year follow-up data. International Orthopaedics (SICOT) 40, 1447–1454 (2016). https://doi.org/10.1007/s00264-015-2919-z

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  • DOI: https://doi.org/10.1007/s00264-015-2919-z

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