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Prospective evaluation of a new plate fixator for valgus-producing medial open-wedge high tibial osteotomy

  • Knee
  • Published:
Knee Surgery, Sports Traumatology, Arthroscopy Aims and scope

Abstract

Purpose

The purpose of this study was to prospectively evaluate the clinical, radiographic, and sports-related outcome at 24 months after valgus-producing medial open-wedge high tibial osteotomy (owHTO) using a 2nd generation peek-carbon composite plate.

Methods

Between 2010 and 2011, the 2nd generation PEEKPower HTO-Plate® was used for medial owHTO in 28 consecutive patients (19 men, 9 women; mean age ± SD: 45 ± 11 years; mean varus deviation ± SD: 4° ± 2°). All of the patients had an osteotomy gap height of ≤12 mm without bone grafting. Visual analog scale (VAS) for pain, WOMAC score, and Lysholm score were evaluated preoperatively and at 12 and 24 months postoperatively. Sports-related outcomes included the Tegner scale, and a self-designed questionnaire preoperatively and 24 months postoperatively. Fixation stability of the implant was evaluated radiographically in two planes by comparing the medial proximal tibial angle (MPTA) and tibial slope 2 days after medial owHTO (baseline measurements) and after implant removal (follow-up measurements). Complications were recorded during the whole study period.

Results

Compared to preoperative conditions, VAS, WOMAC, and Lysholm scores improved significantly (p < 0.05) at the 12- and 24-month follow-up. No significant differences were found between the 12- and 24-month follow-up. After 24 months, the sports frequency increased significantly (p < 0.05). No significant differences between baseline and follow-up measurements for the MPTA and tibial slope were observed. Total complication rate was 4 %, with one patient developing non-union.

Conclusion

In the clinical practice, the 2nd generation PEEKPower HTO-Plate® is a safe and efficient implant for medial owHTO without bone grafting in patients with an osteotomy gap of ≤12 mm.

Level of evidence

III.

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Conflict of interest

A. B. Imhoff and Stefan Hinterwimmer are consultants for Arthrex. The company had no influence on study design, data collection, and interpretation of the results or the final manuscript.

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Authors and Affiliations

  1. Department of Orthopaedic Sports Medicine, Technical University of Munich, Ismaningerstr. 22, 81675, Munich, Germany

    Matthias Cotic, Stephan Vogt, Matthias J. Feucht, Tim Saier, Philipp Minzlaff, Stefan Hinterwimmer & Andreas B. Imhoff

  2. Department of Orthopaedic Sports Medicine, Hessing Stiftung Augsburg, Augsburg, Germany

    Stephan Vogt

  3. Department of Orthopedic Surgery and Traumatology, University Hospital Freiburg, Freiburg, Germany

    Matthias J. Feucht

  4. Department of Trauma and Orthopaedic Surgery, Berufsgenossenschaftliche Unfallklinik Murnau, Murnau, Germany

    Tim Saier

  5. Sportsclinic Germany GmbH, Munich, Germany

    Stefan Hinterwimmer

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  1. Matthias Cotic
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Correspondence to Andreas B. Imhoff.

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Matthias Cotic and Stephan Vogt are contributed equally.

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Cotic, M., Vogt, S., Feucht, M.J. et al. Prospective evaluation of a new plate fixator for valgus-producing medial open-wedge high tibial osteotomy. Knee Surg Sports Traumatol Arthrosc 23, 3707–3716 (2015). https://doi.org/10.1007/s00167-014-3287-8

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