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Medial malleolar osteotomy for the treatment of talar osteochondral lesions: anatomical and morbidity considerations

  • Ankle
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Knee Surgery, Sports Traumatology, Arthroscopy Aims and scope

Abstract

Purpose

Osteochondral lesions of the talus are often located posteromedially requiring open surgery to facilitate solid and complete osteochondral reconstruction. The aim of the study was to identify the optimal anatomical site for medial malleolar osteotomy based on the criteria of minimal cartilage damage (Study I) and to report on the morbidity in patients receiving osteotomy performed at the previously identified site (Study II).

Methods

For Study I, cartilage coverage of the tibiofibular ankle joint facet was measured in 40 cadaveric ankles (20 cadaver specimens). In Study II, we assessed clinical (VAS pain score, AOFAS score, range of motion) and radiological outcome measures (SPECT-CT) in 17 patients (mean age, 36.8 ± 10.8 years) undergoing medial malleolar osteotomy.

Results

The medial edge in the transition zone of the tibial plafond to the medial malleolus showed less than 75 % of cartilage coverage in 62.5 % of cadavers (Study I). Surgery resulted in lower pain levels (2.4 ± 2.6 compared with 6.3 ± 1.8 points; p < 0.001) and greater AOFAS scores (82.9 ± 14.1 compared with 43.5 ± 10.8 to points; p < 0.001) compared with baseline (Study II). No signs of intra-operative damage or mal- or non-union were found. Long-term morbidity was found in one patient. Implant removal was necessary in 12 of 17 patients (71 %).

Conclusion

Anatomically, there is an optimal location for the medial malleolar osteotomy at the medial ankle edge involving minimal cartilage damage. Clinical results using this location showed no short- or mid-term morbidity and little long-term morbidity. However, many patients required re-intervention for implant removal.

Level of evidence

IV.

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Authors and Affiliations

  1. Orthopaedic Department, University Hospital of Basel, Spitalstrasse 21, 4031, Basel, Switzerland

    André Leumann, Monika Horisberger, Olaf Buettner & Victor Valderrabano

  2. Department of Anatomy, University of Basel, Basel, Switzerland

    André Leumann & Magdalena Mueller-Gerbl

Authors
  1. André Leumann
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  2. Monika Horisberger
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  3. Olaf Buettner
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  4. Magdalena Mueller-Gerbl
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  5. Victor Valderrabano
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Correspondence to André Leumann.

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Leumann, A., Horisberger, M., Buettner, O. et al. Medial malleolar osteotomy for the treatment of talar osteochondral lesions: anatomical and morbidity considerations. Knee Surg Sports Traumatol Arthrosc 24, 2133–2139 (2016). https://doi.org/10.1007/s00167-015-3591-y

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