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Complication rate following high tibial open-wedge osteotomy with spacer plates for incipient osteoarthritis of the knee with varus malalignment

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

Abstract

Purpose

Medial open-wedge high tibial osteotomy (HTO) with spacer plates is recommended to correct varus malalignment of the knee with symptomatic overload of the medial compartment.

Methods

Fifty-five knees in 50 patients were assessed. Intra- and post-operative complications were recorded, and Tegner, Lysholm and IKDC scores were used to evaluate functional results. Radiological parameters consisted of medial proximal tibial angle (aMPTA), femorotibial angle (aFTA), posterior proximal tibial angle, lateral distal femur angle, mechanical axis deviation (MAD) and osteoarthritis score (Jäger and Wirth).

Results

Duration of follow-up was 5.0 ± 1.4 years. Overall and implant-related complication rates were 27.3 and 10.9 %, respectively. No statistical association could be detected between overall and implant-related complication rates and age, gender, wedge size, angle of correction or body mass index. Mean improvement in Lysholm score was 26.8. Overall IKDC scores at follow-up were A25, B26, C2 and D2. Post-operative correction of MPTA and FTA averaged to 89.6° and 173° and to 89° and 173.5° at follow-up, respectively. Initial MAD of 21.8 mm was corrected to 11.8 mm at follow-up. Osteoarthritis score increased from 1.4 ± 0.9 to 1.9 ± 0.9 points.

Conclusions

HTO with spacer plates improves knee function and is an effective procedure in selected patients. Overall and implant-related complication rates should be considered and seem to be lower with a smaller angle of correction corresponding to incipient osteoarthritis and less varus deformity.

Level of evidence

Retrospective case series, Level IV.

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Authors and Affiliations

  1. Department for Trauma Surgery and Sports Traumatology, Academic Hospital Feldkirch, Carinagasse 47, 6800, Feldkirch, Austria

    Michael Osti, Alexander Gohm, Bernd Schlick & Karl Peter Benedetto

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  1. Michael Osti
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  2. Alexander Gohm
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  3. Bernd Schlick
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  4. Karl Peter Benedetto
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Correspondence to Michael Osti.

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Osti, M., Gohm, A., Schlick, B. et al. Complication rate following high tibial open-wedge osteotomy with spacer plates for incipient osteoarthritis of the knee with varus malalignment. Knee Surg Sports Traumatol Arthrosc 23, 1943–1948 (2015). https://doi.org/10.1007/s00167-013-2757-8

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  • DOI: https://doi.org/10.1007/s00167-013-2757-8

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