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Tibial slope and high tibial osteotomy using the circular external fixator
Taner Gunes1, Cengiz Sen, Mehmet Erdem
1School of Medicine, Gaziosmanpasa University, Tokat, Turkey. drtgunes@gmail.com
Summary
High tibial osteotomy using the Ilizarov system does not significantly alter tibial slope. This finding suggests reduced complications for future total knee replacement procedures.
Area of Science:
- Orthopedic Surgery
- Biomechanical Engineering
Background:
- Tibial slope alterations are significant anatomical changes after high tibial osteotomy.
- Changes in tibial slope can impact subsequent total knee prosthesis procedures.
Purpose of the Study:
- To evaluate tibial slope changes after high tibial osteotomy using a circular external fixator.
- To determine if high tibial osteotomy affects the sagittal tibial slope.
Main Methods:
- Retrospective study of 18 knees in 17 patients (17 female, mean age 51) undergoing high tibial osteotomy for medial compartment arthrosis.
- Evaluation of tibial slope changes using a circular external fixator (Ilizarov system).
- Measurement of mechanical femoro-tibial angle and posterior proximal femoral angle.
Main Results:
- A mean correction of 12.3 degrees in the mechanical femoro-tibial angle was achieved (P = 0.0001).
- No significant change in tibial slope was observed in the sagittal plane (P = 0.127).
- Postoperative posterior proximal femoral angle remained within the normal range.
Conclusions:
- High tibial osteotomy performed with the Ilizarov system does not cause significant tibial slope alteration.
- This lack of change may prevent complications related to tibial slope in follow-up and future total knee replacement surgeries.